Ohio pollen and allergy seasons
July outlookModerate
Ohio has a spring tree season and one of the heavier ragweed seasons in the country in late summer.
Twelve month pollen calendar
J
F
M
A
M
J
J
●
A
S
O
N
D
LowModerateHighVery high
Dominant species in July
Grass
Typical peak in July
No clear peak this month
Worst month of the year
September
Best month of the year
January
What is active in July
Grass
Cities in Ohio
| City | Today | Worst today | Typical in July |
|---|---|---|---|
| Youngstown | Very Highas of Jul 12 | Grass | Moderate |
| Westlake | Very Highas of Jul 12 | Grass | Moderate |
| Avon | Very Highas of Jul 12 | Grass | Moderate |
| Hudson | Very Highas of Jul 12 | Grass | Moderate |
| Middlefield | Very Highas of Jul 12 | Grass | Moderate |
| Burton | Very Highas of Jul 12 | Grass | Moderate |
| Richmond Heights | Very Highas of Jul 12 | Grass | Moderate |
| Grove City | Moderateas of Jul 12 | Grass | Moderate |
| Hilliard | Moderateas of Jul 12 | Grass | Moderate |
| Mount Vernon | Moderateas of Jul 12 | Grass | Moderate |
| Fayetteville | Moderateas of Jul 12 | Grass | Moderate |
| Obetz | Moderateas of Jul 12 | Grass | Moderate |
| Clarksburg | Moderateas of Jul 12 | Grass | Moderate |
| Riverside | Lowas of Jul 12 | Grass | Moderate |
| Whitehall | Lowas of Jul 12 | Grass | Moderate |
| Miamisburg | Lowas of Jul 12 | Grass | Moderate |
| White Oak | Lowas of Jul 12 | Grass | Moderate |
| Batavia | Lowas of Jul 12 | Grass | Moderate |
| Rossmoyne | Lowas of Jul 12 | Grass | Moderate |
| Bradford | Lowas of Jul 12 | Grass | Moderate |
| Thornville | Lowas of Jul 12 | Grass | Moderate |
| Canton | Noneas of Jul 12 | None | Moderate |
| Lima | Noneas of Jul 12 | None | Moderate |
| Barberton | Noneas of Jul 12 | None | Moderate |
| Norwalk | Noneas of Jul 12 | None | Moderate |
| Maumee | Noneas of Jul 12 | None | Moderate |
| Wapakoneta | Noneas of Jul 12 | None | Moderate |
| Cortland | Noneas of Jul 12 | None | Moderate |
| Carmel | Noneas of Jul 12 | None | Moderate |
| Archbold | Noneas of Jul 12 | None | Moderate |
| Yellow Springs | Noneas of Jul 12 | None | Moderate |
| Dennison | Noneas of Jul 12 | None | Moderate |
| Uniontown | Noneas of Jul 12 | None | Moderate |
| Cleveland | No live reading | Not available | Moderate |
| Columbus | No live reading | Not available | Moderate |
| Dayton | No live reading | Not available | Moderate |
| Akron | No live reading | Not available | Moderate |
| Toledo | No live reading | Not available | Moderate |
| Cincinnati | No live reading | Not available | Moderate |
| Lorain | No live reading | Not available | Moderate |
| Middletown | No live reading | Not available | Moderate |
| Springfield | No live reading | Not available | Moderate |
| Newark | No live reading | Not available | Moderate |
| Parma | No live reading | Not available | Moderate |
| Mansfield | No live reading | Not available | Moderate |
| Hamilton | No live reading | Not available | Moderate |
| Kettering | No live reading | Not available | Moderate |
| Elyria | No live reading | Not available | Moderate |
| Cuyahoga Falls | No live reading | Not available | Moderate |
| Lakewood | No live reading | Not available | Moderate |
| Dublin | No live reading | Not available | Moderate |
| Euclid | No live reading | Not available | Moderate |
| Mentor | No live reading | Not available | Moderate |
| Beavercreek | No live reading | Not available | Moderate |
| Strongsville | No live reading | Not available | Moderate |
| Cleveland Heights | No live reading | Not available | Moderate |
| Fairfield | No live reading | Not available | Moderate |
| Huber Heights | No live reading | Not available | Moderate |
| Delaware | No live reading | Not available | Moderate |
| Reynoldsburg | No live reading | Not available | Moderate |
| Lancaster | No live reading | Not available | Moderate |
| Findlay | No live reading | Not available | Moderate |
| Warren | No live reading | Not available | Moderate |
| Westerville | No live reading | Not available | Moderate |
| Upper Arlington | No live reading | Not available | Moderate |
| North Ridgeville | No live reading | Not available | Moderate |
| Marion | No live reading | Not available | Moderate |
| Gahanna | No live reading | Not available | Moderate |
| Brunswick | No live reading | Not available | Moderate |
| Mason | No live reading | Not available | Moderate |
| Fairborn | No live reading | Not available | Moderate |
| Stow | No live reading | Not available | Moderate |
| Massillon | No live reading | Not available | Moderate |
| North Olmsted | No live reading | Not available | Moderate |
| North Royalton | No live reading | Not available | Moderate |
| Austintown | No live reading | Not available | Moderate |
| Bowling Green | No live reading | Not available | Moderate |
| Garfield Heights | No live reading | Not available | Moderate |
| Shaker Heights | No live reading | Not available | Moderate |
| Green | No live reading | Not available | Moderate |
| Kent | No live reading | Not available | Moderate |
| Wooster | No live reading | Not available | Moderate |
| Troy | No live reading | Not available | Moderate |
| Marysville | No live reading | Not available | Moderate |
| Medina | No live reading | Not available | Moderate |
| Xenia | No live reading | Not available | Moderate |
| Avon Lake | No live reading | Not available | Moderate |
| Perrysburg | No live reading | Not available | Moderate |
| Centerville | No live reading | Not available | Moderate |
| Sandusky | No live reading | Not available | Moderate |
| Zanesville | No live reading | Not available | Moderate |
| Wadsworth | No live reading | Not available | Moderate |
| Solon | No live reading | Not available | Moderate |
| Willoughby | No live reading | Not available | Moderate |
| Pickerington | No live reading | Not available | Moderate |
| Maple Heights | No live reading | Not available | Moderate |
| Athens | No live reading | Not available | Moderate |
| Trotwood | No live reading | Not available | Moderate |
| Oxford | No live reading | Not available | Moderate |
| Chillicothe | No live reading | Not available | Moderate |
| South Euclid | No live reading | Not available | Moderate |
| Alliance | No live reading | Not available | Moderate |
| Rocky River | No live reading | Not available | Moderate |
| Lebanon | No live reading | Not available | Moderate |
| Parma Heights | No live reading | Not available | Moderate |
| Piqua | No live reading | Not available | Moderate |
| Sidney | No live reading | Not available | Moderate |
| Painesville | No live reading | Not available | Moderate |
| Mayfield Heights | No live reading | Not available | Moderate |
| Forest Park | No live reading | Not available | Moderate |
| Oregon | No live reading | Not available | Moderate |
| Broadview Heights | No live reading | Not available | Moderate |
| Springboro | No live reading | Not available | Moderate |
| Twinsburg | No live reading | Not available | Moderate |
| Sylvania | No live reading | Not available | Moderate |
| Norwood | No live reading | Not available | Moderate |
| Ashland | No live reading | Not available | Moderate |
| Tallmadge | No live reading | Not available | Moderate |
| Brook Park | No live reading | Not available | Moderate |
| Berea | No live reading | Not available | Moderate |
| Niles | No live reading | Not available | Moderate |
| Steubenville | No live reading | Not available | Moderate |
| Pataskala | No live reading | Not available | Moderate |
| Ashtabula | No live reading | Not available | Moderate |
| Portsmouth | No live reading | Not available | Moderate |
| Tiffin | No live reading | Not available | Moderate |
| North Canton | No live reading | Not available | Moderate |
| New Philadelphia | No live reading | Not available | Moderate |
| Eastlake | No live reading | Not available | Moderate |
| Streetsboro | No live reading | Not available | Moderate |
| Aurora | No live reading | Not available | Moderate |
| Fairview Park | No live reading | Not available | Moderate |
| Defiance | No live reading | Not available | Moderate |
| Bay Village | No live reading | Not available | Moderate |
| Fremont | No live reading | Not available | Moderate |
| Middleburg Heights | No live reading | Not available | Moderate |
| Vandalia | No live reading | Not available | Moderate |
| Monroe | No live reading | Not available | Moderate |
| Worthington | No live reading | Not available | Moderate |
| Washington Court House | No live reading | Not available | Moderate |
| Powell | No live reading | Not available | Moderate |
| Willowick | No live reading | Not available | Moderate |
| Circleville | No live reading | Not available | Moderate |
| Bellefontaine | No live reading | Not available | Moderate |
| Sharonville | No live reading | Not available | Moderate |
| Lyndhurst | No live reading | Not available | Moderate |
| Beachwood | No live reading | Not available | Moderate |
| New Franklin | No live reading | Not available | Moderate |
| Bridgetown | No live reading | Not available | Moderate |
| East Cleveland | No live reading | Not available | Moderate |
| Brecksville | No live reading | Not available | Moderate |
| Warrensville Heights | No live reading | Not available | Moderate |
| University Heights | No live reading | Not available | Moderate |
| Harrison | No live reading | Not available | Moderate |
| Englewood | No live reading | Not available | Moderate |
| Blue Ash | No live reading | Not available | Moderate |
| Bexley | No live reading | Not available | Moderate |
| Trenton | No live reading | Not available | Moderate |
| Marietta | No live reading | Not available | Moderate |
| Loveland | No live reading | Not available | Moderate |
| Clayton | No live reading | Not available | Moderate |
| Dover | No live reading | Not available | Moderate |
| West Carrollton | No live reading | Not available | Moderate |
| Bedford | No live reading | Not available | Moderate |
| Amherst | No live reading | Not available | Moderate |
| Greenville | No live reading | Not available | Moderate |
| Fostoria | No live reading | Not available | Moderate |
| Wickliffe | No live reading | Not available | Moderate |
| Wilmington | No live reading | Not available | Moderate |
| Amelia | No live reading | Not available | Moderate |
| Conneaut | No live reading | Not available | Moderate |
| Monfort Heights | No live reading | Not available | Moderate |
| Macedonia | No live reading | Not available | Moderate |
| Dent | No live reading | Not available | Moderate |
| Finneytown | No live reading | Not available | Moderate |
| Salem | No live reading | Not available | Moderate |
| Franklin | No live reading | Not available | Moderate |
| Seven Hills | No live reading | Not available | Moderate |
| Bucyrus | No live reading | Not available | Moderate |
| Norton | No live reading | Not available | Moderate |
| Mack | No live reading | Not available | Moderate |
| Ravenna | No live reading | Not available | Moderate |
| Forestville | No live reading | Not available | Moderate |
| Brooklyn | No live reading | Not available | Moderate |
| Urbana | No live reading | Not available | Moderate |
| New Albany | No live reading | Not available | Moderate |
| Canal Winchester | No live reading | Not available | Moderate |
| Cambridge | No live reading | Not available | Moderate |
| Milford | No live reading | Not available | Moderate |
| Long Bottom | No live reading | Not available | Moderate |
| Lucasville | No live reading | Not available | Moderate |
| Gettysburg | No live reading | Not available | Moderate |
| Coshocton | No live reading | Not available | Moderate |
| Summerfield | No live reading | Not available | Moderate |
| Huron | No live reading | Not available | Moderate |
| Celina | No live reading | Not available | Moderate |
| Sunbury | No live reading | Not available | Moderate |
| West Chester | No live reading | Not available | Moderate |
| Georgetown | No live reading | Not available | Moderate |
| Ironton | No live reading | Not available | Moderate |
| Barnesville | No live reading | Not available | Moderate |
| New Bremen | No live reading | Not available | Moderate |
| Williamsburg | No live reading | Not available | Moderate |
| New Carlisle | No live reading | Not available | Moderate |
| Pomeroy | No live reading | Not available | Moderate |
| Lewis Center | No live reading | Not available | Moderate |
| Jamestown | No live reading | Not available | Moderate |
| Thompson | No live reading | Not available | Moderate |
| Gibsonburg | No live reading | Not available | Moderate |
| South Point | No live reading | Not available | Moderate |
| Crestline | No live reading | Not available | Moderate |
| London | No live reading | Not available | Moderate |
| Kalida | No live reading | Not available | Moderate |
| Milan | No live reading | Not available | Moderate |
| Groveport | No live reading | Not available | Moderate |
| Montpelier | No live reading | Not available | Moderate |
| Pleasantville | No live reading | Not available | Moderate |
| Mantua | No live reading | Not available | Moderate |
| Cleves | No live reading | Not available | Moderate |
| Covington | No live reading | Not available | Moderate |
| Brooklyn Heights | No live reading | Not available | Moderate |
| Lodi | No live reading | Not available | Moderate |
| Galion | No live reading | Not available | Moderate |
| Logan | No live reading | Not available | Moderate |
| Vinton | No live reading | Not available | Moderate |
| Port Clinton | No live reading | Not available | Moderate |
| West Milton | No live reading | Not available | Moderate |
| Northfield | No live reading | Not available | Moderate |
| Magnetic Springs | No live reading | Not available | Moderate |
| Leipsic | No live reading | Not available | Moderate |
| Lynchburg | No live reading | Not available | Moderate |
| Stryker | No live reading | Not available | Moderate |
| Whitehouse | No live reading | Not available | Moderate |
| Tipp City | No live reading | Not available | Moderate |
| Windham | No live reading | Not available | Moderate |
| Newton Falls | No live reading | Not available | Moderate |
| Hubbard | No live reading | Not available | Moderate |
| Bluffton | No live reading | Not available | Moderate |
| Crown City | No live reading | Not available | Moderate |
| Ada | No live reading | Not available | Moderate |
| Mount Gilead | No live reading | Not available | Moderate |
| Cedarville | No live reading | Not available | Moderate |
| Canfield | No live reading | Not available | Moderate |
| Wauseon | No live reading | Not available | Moderate |
| Miami Grove | No live reading | Not available | Moderate |
| Boardman | No live reading | Not available | Moderate |
| Wakeman | No live reading | Not available | Moderate |
| Peebles | No live reading | Not available | Moderate |
| Huntsburg | No live reading | Not available | Moderate |
| Friendship | No live reading | Not available | Moderate |
| Killbuck | No live reading | Not available | Moderate |
| Burbank | No live reading | Not available | Moderate |
| Willard | No live reading | Not available | Moderate |
| Campus | No live reading | Not available | Moderate |
| Fort Loramie | No live reading | Not available | Moderate |
| Cardington | No live reading | Not available | Moderate |
| Croton | No live reading | Not available | Moderate |
| Doylestown | No live reading | Not available | Moderate |
| Kenton | No live reading | Not available | Moderate |
| New Knoxville | No live reading | Not available | Moderate |
| Bainbridge | No live reading | Not available | Moderate |
| Rootstown | No live reading | Not available | Moderate |
| Clinton | No live reading | Not available | Moderate |
| Stoutsville | No live reading | Not available | Moderate |
| Clarksville | No live reading | Not available | Moderate |
| Concord | No live reading | Not available | Moderate |
| Morrow | No live reading | Not available | Moderate |
| Waterville | No live reading | Not available | Moderate |
| Chagrin Falls | No live reading | Not available | Moderate |
| Mogadore | No live reading | Not available | Moderate |
| New London | No live reading | Not available | Moderate |
| Atwater | No live reading | Not available | Moderate |
| Huber Ridge | No live reading | Not available | Moderate |
| Shelby | No live reading | Not available | Moderate |
| Deersville | No live reading | Not available | Moderate |
| Leetonia | No live reading | Not available | Moderate |
| Ontario | No live reading | Not available | Moderate |
| Dresden | No live reading | Not available | Moderate |
| Lakeside Marblehead | No live reading | Not available | Moderate |
| Howard | No live reading | Not available | Moderate |
| Elmore | No live reading | Not available | Moderate |
| Luckey | No live reading | Not available | Moderate |
| Plain City | No live reading | Not available | Moderate |
| Brookville | No live reading | Not available | Moderate |
| Hamersville | No live reading | Not available | Moderate |
| Goshen | No live reading | Not available | Moderate |
| Walnut Hills | No live reading | Not available | Moderate |
| Sycamore | No live reading | Not available | Moderate |
| Shreve | No live reading | Not available | Moderate |
| Maplewood | No live reading | Not available | Moderate |
| Chardon | No live reading | Not available | Moderate |
| Fort Jennings | No live reading | Not available | Moderate |
| Alexandria | No live reading | Not available | Moderate |
| Mcconnelsville | No live reading | Not available | Moderate |
| Ottawa | No live reading | Not available | Moderate |
| Chesapeake | No live reading | Not available | Moderate |
| Sullivan | No live reading | Not available | Moderate |
| Franklin Furnace | No live reading | Not available | Moderate |
| Geneva-On-The-Lake | No live reading | Not available | Moderate |
| North Bend | No live reading | Not available | Moderate |
| Gambier | No live reading | Not available | Moderate |
| Evendale | No live reading | Not available | Moderate |
| Bethel | No live reading | Not available | Moderate |
| Pemberville | No live reading | Not available | Moderate |
| Mount Healthy | No live reading | Not available | Moderate |
| Mayfield | No live reading | Not available | Moderate |
| Westland | No live reading | Not available | Moderate |
| Valley View | No live reading | Not available | Moderate |
| Lewisburg | No live reading | Not available | Moderate |
| North Zanesville | No live reading | Not available | Moderate |
| Blanchester | No live reading | Not available | Moderate |
| Portland | No live reading | Not available | Moderate |
| South Lebanon | No live reading | Not available | Moderate |
| Fairlawn | No live reading | Not available | Moderate |
| Jefferson | No live reading | Not available | Moderate |
| Madison | No live reading | Not available | Moderate |
| Rosewood | No live reading | Not available | Moderate |
| Anna | No live reading | Not available | Moderate |
| Olmsted Falls | No live reading | Not available | Moderate |
| Maineville | No live reading | Not available | Moderate |
| Northfield Center | No live reading | Not available | Moderate |
| Blacklick | No live reading | Not available | Moderate |
| Hartville | No live reading | Not available | Moderate |
| Oberlin | No live reading | Not available | Moderate |
| Struthers | No live reading | Not available | Moderate |
| Bellbrook | No live reading | Not available | Moderate |
| Walnut Creek | No live reading | Not available | Moderate |
| Litchfield | No live reading | Not available | Moderate |
| Gallipolis | No live reading | Not available | Moderate |
| Mount Orab | No live reading | Not available | Moderate |
| Etna | No live reading | Not available | Moderate |
| Van Wert | No live reading | Not available | Moderate |
| Richwood | No live reading | Not available | Moderate |
| North Jackson | No live reading | Not available | Moderate |
| Fishersville | No live reading | Not available | Moderate |
| Mc Arthur | No live reading | Not available | Moderate |
| Chesterland | No live reading | Not available | Moderate |
| Lake Milton | No live reading | Not available | Moderate |
| Carroll | No live reading | Not available | Moderate |
| Independence | No live reading | Not available | Moderate |
| Canal Fulton | No live reading | Not available | Moderate |
| Granville | No live reading | Not available | Moderate |
| Medway | No live reading | Not available | Moderate |
| Winchester | No live reading | Not available | Moderate |
| East Liverpool | No live reading | Not available | Moderate |
| Saint Clairsville | No live reading | Not available | Moderate |
| Louisville | No live reading | Not available | Moderate |
| Grafton | No live reading | Not available | Moderate |
| Millersburg | No live reading | Not available | Moderate |
| Orient | No live reading | Not available | Moderate |
| New Holland | No live reading | Not available | Moderate |
| Holmesville | No live reading | Not available | Moderate |
| Germantown | No live reading | Not available | Moderate |
| Jackson | No live reading | Not available | Moderate |
| New Madison | No live reading | Not available | Moderate |
Today and worst today come from live readings where available. Typical shows the usual level for this month from the seasonal profile.
The Ohio allergy season
Allergy levels in Ohio peak in September, when ragweed pollen runs highest. The season moves through tree pollen around April, grass in June, weed pollen such as ragweed in September. Levels start to climb around March. The lowest pollen levels of the year arrive in January.
Common questions
When does allergy season start in Ohio?
Pollen levels in Ohio usually begin climbing in March and reach their highest point in September.
What is the worst month for allergies in Ohio?
September is typically the worst month in Ohio, driven by ragweed pollen.
When does ragweed season end in Ohio?
Ragweed pollen in Ohio usually fades by the end of October, after the first hard frost in colder areas.
When is the best time for allergies in Ohio?
January usually brings the lowest pollen levels of the year in Ohio.