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
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F
M
A
M
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A
S
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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 |
|---|---|---|---|
| Strongsville | Very Highas of Jul 15 | Grass | Moderate |
| Lancaster | Very Highas of Jul 15 | Grass | Moderate |
| Westerville | Very Highas of Jul 15 | Grass | Moderate |
| Marion | Very Highas of Jul 15 | Grass | Moderate |
| Brunswick | Very Highas of Jul 15 | Grass | Moderate |
| Westlake | Very Highas of Jul 15 | Grass | Moderate |
| North Royalton | Very Highas of Jul 15 | Grass | Moderate |
| Troy | Very Highas of Jul 15 | Grass | Moderate |
| Whitehall | Very Highas of Jul 15 | Grass | Moderate |
| Broadview Heights | Very Highas of Jul 15 | Grass | Moderate |
| Norwood | Very Highas of Jul 15 | Grass | Moderate |
| Brook Park | Very Highas of Jul 15 | Grass | Moderate |
| Bay Village | Very Highas of Jul 15 | Grass | Moderate |
| Brecksville | Very Highas of Jul 15 | Grass | Moderate |
| Clayton | Very Highas of Jul 15 | Grass | Moderate |
| Seven Hills | Very Highas of Jul 15 | Grass | Moderate |
| Batavia | Very Highas of Jul 15 | Grass | Moderate |
| West Chester | Very Highas of Jul 15 | Grass | Moderate |
| London | Very Highas of Jul 15 | Grass | Moderate |
| Pleasantville | Very Highas of Jul 15 | Grass | Moderate |
| Mantua | Very Highas of Jul 15 | Grass | Moderate |
| Brooklyn Heights | Very Highas of Jul 15 | Grass | Moderate |
| Bradford | Very Highas of Jul 15 | Grass | Moderate |
| Windham | Very Highas of Jul 15 | Grass | Moderate |
| Canfield | Very Highas of Jul 15 | Grass | Moderate |
| Middlefield | Very Highas of Jul 15 | Grass | Moderate |
| Huntsburg | Very Highas of Jul 15 | Grass | Moderate |
| Fayetteville | Very Highas of Jul 15 | Grass | Moderate |
| Burton | Very Highas of Jul 15 | Grass | Moderate |
| Morrow | Very Highas of Jul 15 | Grass | Moderate |
| Huber Ridge | Very Highas of Jul 15 | Grass | Moderate |
| Geneva-On-The-Lake | Very Highas of Jul 15 | Grass | Moderate |
| South Lebanon | Very Highas of Jul 15 | Grass | Moderate |
| Olmsted Falls | Very Highas of Jul 15 | Grass | Moderate |
| Oberlin | Very Highas of Jul 15 | Grass | Moderate |
| Carroll | Very Highas of Jul 15 | Grass | Moderate |
| Independence | Very Highas of Jul 15 | Grass | Moderate |
| Medway | Very Highas of Jul 15 | Grass | Moderate |
| Newark | Highas of Jul 15 | Grass | Moderate |
| Hamilton | Highas of Jul 15 | Grass | Moderate |
| Cleveland Heights | Highas of Jul 15 | Grass | Moderate |
| Mason | Highas of Jul 15 | Grass | Moderate |
| North Olmsted | Highas of Jul 15 | Grass | Moderate |
| Solon | Highas of Jul 15 | Grass | Moderate |
| Pickerington | Highas of Jul 15 | Grass | Moderate |
| Hudson | Highas of Jul 15 | Grass | Moderate |
| Oxford | Highas of Jul 15 | Grass | Moderate |
| Lebanon | Highas of Jul 15 | Grass | Moderate |
| Oregon | Highas of Jul 15 | Grass | Moderate |
| Mount Vernon | Highas of Jul 15 | Grass | Moderate |
| East Cleveland | Highas of Jul 15 | Grass | Moderate |
| University Heights | Highas of Jul 15 | Grass | Moderate |
| Monfort Heights | Highas of Jul 15 | Grass | Moderate |
| Macedonia | Highas of Jul 15 | Grass | Moderate |
| Forestville | Highas of Jul 15 | Grass | Moderate |
| Sunbury | Highas of Jul 15 | Grass | Moderate |
| Groveport | Highas of Jul 15 | Grass | Moderate |
| Chardon | Highas of Jul 15 | Grass | Moderate |
| Alexandria | Highas of Jul 15 | Grass | Moderate |
| Evendale | Highas of Jul 15 | Grass | Moderate |
| Blacklick | Highas of Jul 15 | Grass | Moderate |
| Chesterland | Highas of Jul 15 | Grass | Moderate |
| Germantown | Highas of Jul 15 | Grass | Moderate |
| Cleveland | Moderateas of Jul 15 | Grass | Moderate |
| Columbus | Moderateas of Jul 15 | Grass | Moderate |
| Dayton | Moderateas of Jul 15 | Grass | Moderate |
| Toledo | Moderateas of Jul 15 | Grass | Moderate |
| Youngstown | Moderateas of Jul 15 | Grass | Moderate |
| Cincinnati | Moderateas of Jul 15 | Grass | Moderate |
| Lorain | Moderateas of Jul 15 | Grass | Moderate |
| Kettering | Moderateas of Jul 15 | Grass | Moderate |
| Elyria | Moderateas of Jul 15 | Grass | Moderate |
| Euclid | Moderateas of Jul 15 | Grass | Moderate |
| Mentor | Moderateas of Jul 15 | Grass | Moderate |
| Fairfield | Moderateas of Jul 15 | Grass | Moderate |
| Hilliard | Moderateas of Jul 15 | Grass | Moderate |
| Gahanna | Moderateas of Jul 15 | Grass | Moderate |
| Austintown | Moderateas of Jul 15 | Grass | Moderate |
| Shaker Heights | Moderateas of Jul 15 | Grass | Moderate |
| Xenia | Moderateas of Jul 15 | Grass | Moderate |
| Avon | Moderateas of Jul 15 | Grass | Moderate |
| Centerville | Moderateas of Jul 15 | Grass | Moderate |
| Riverside | Moderateas of Jul 15 | Grass | Moderate |
| Willoughby | Moderateas of Jul 15 | Grass | Moderate |
| Chillicothe | Moderateas of Jul 15 | Grass | Moderate |
| South Euclid | Moderateas of Jul 15 | Grass | Moderate |
| Parma Heights | Moderateas of Jul 15 | Grass | Moderate |
| Painesville | Moderateas of Jul 15 | Grass | Moderate |
| Mayfield Heights | Moderateas of Jul 15 | Grass | Moderate |
| Forest Park | Moderateas of Jul 15 | Grass | Moderate |
| Miamisburg | Moderateas of Jul 15 | Grass | Moderate |
| Springboro | Moderateas of Jul 15 | Grass | Moderate |
| Sylvania | Moderateas of Jul 15 | Grass | Moderate |
| White Oak | Moderateas of Jul 15 | Grass | Moderate |
| Berea | Moderateas of Jul 15 | Grass | Moderate |
| Steubenville | Moderateas of Jul 15 | Grass | Moderate |
| Eastlake | Moderateas of Jul 15 | Grass | Moderate |
| Aurora | Moderateas of Jul 15 | Grass | Moderate |
| Fairview Park | Moderateas of Jul 15 | Grass | Moderate |
| Vandalia | Moderateas of Jul 15 | Grass | Moderate |
| Monroe | Moderateas of Jul 15 | Grass | Moderate |
| Washington Court House | Moderateas of Jul 15 | Grass | Moderate |
| Powell | Moderateas of Jul 15 | Grass | Moderate |
| Circleville | Moderateas of Jul 15 | Grass | Moderate |
| Beachwood | Moderateas of Jul 15 | Grass | Moderate |
| Warrensville Heights | Moderateas of Jul 15 | Grass | Moderate |
| Englewood | Moderateas of Jul 15 | Grass | Moderate |
| Loveland | Moderateas of Jul 15 | Grass | Moderate |
| West Carrollton | Moderateas of Jul 15 | Grass | Moderate |
| Bedford | Moderateas of Jul 15 | Grass | Moderate |
| Greenville | Moderateas of Jul 15 | Grass | Moderate |
| Wickliffe | Moderateas of Jul 15 | Grass | Moderate |
| Brooklyn | Moderateas of Jul 15 | Grass | Moderate |
| Gettysburg | Moderateas of Jul 15 | Grass | Moderate |
| Georgetown | Moderateas of Jul 15 | Grass | Moderate |
| New Carlisle | Moderateas of Jul 15 | Grass | Moderate |
| Lewis Center | Moderateas of Jul 15 | Grass | Moderate |
| Hubbard | Moderateas of Jul 15 | Grass | Moderate |
| Miami Grove | Moderateas of Jul 15 | Grass | Moderate |
| Croton | Moderateas of Jul 15 | Grass | Moderate |
| Kenton | Moderateas of Jul 15 | Grass | Moderate |
| Chagrin Falls | Moderateas of Jul 15 | Grass | Moderate |
| Plain City | Moderateas of Jul 15 | Grass | Moderate |
| Hamersville | Moderateas of Jul 15 | Grass | Moderate |
| Gambier | Moderateas of Jul 15 | Grass | Moderate |
| Mount Healthy | Moderateas of Jul 15 | Grass | Moderate |
| Valley View | Moderateas of Jul 15 | Grass | Moderate |
| Lewisburg | Moderateas of Jul 15 | Grass | Moderate |
| Thornville | Moderateas of Jul 15 | Grass | Moderate |
| Blanchester | Moderateas of Jul 15 | Grass | Moderate |
| Rosewood | Moderateas of Jul 15 | Grass | Moderate |
| Clarksburg | Moderateas of Jul 15 | Grass | Moderate |
| Struthers | Moderateas of Jul 15 | Grass | Moderate |
| Richwood | Moderateas of Jul 15 | Grass | Moderate |
| Fishersville | Moderateas of Jul 15 | Grass | Moderate |
| East Liverpool | Moderateas of Jul 15 | Grass | Moderate |
| New Madison | Moderateas of Jul 15 | Grass | Moderate |
| Springfield | Noneas of Jul 15 | None | Moderate |
| Lima | Noneas of Jul 15 | None | Moderate |
| Findlay | Noneas of Jul 15 | None | Moderate |
| Warren | Noneas of Jul 15 | None | Moderate |
| Stow | Noneas of Jul 15 | None | Moderate |
| Massillon | Noneas of Jul 15 | None | Moderate |
| Bowling Green | Noneas of Jul 15 | None | Moderate |
| Medina | Noneas of Jul 15 | None | Moderate |
| Barberton | Noneas of Jul 15 | None | Moderate |
| Zanesville | Noneas of Jul 15 | None | Moderate |
| Wadsworth | Noneas of Jul 15 | None | Moderate |
| Athens | Noneas of Jul 15 | None | Moderate |
| Sidney | Noneas of Jul 15 | None | Moderate |
| Ashland | Noneas of Jul 15 | None | Moderate |
| Tallmadge | Noneas of Jul 15 | None | Moderate |
| Ashtabula | Noneas of Jul 15 | None | Moderate |
| Portsmouth | Noneas of Jul 15 | None | Moderate |
| North Canton | Noneas of Jul 15 | None | Moderate |
| New Philadelphia | Noneas of Jul 15 | None | Moderate |
| Norwalk | Noneas of Jul 15 | None | Moderate |
| Fremont | Noneas of Jul 15 | None | Moderate |
| Bellefontaine | Noneas of Jul 15 | None | Moderate |
| Maumee | Noneas of Jul 15 | None | Moderate |
| Marietta | Noneas of Jul 15 | None | Moderate |
| Fostoria | Noneas of Jul 15 | None | Moderate |
| Wilmington | Noneas of Jul 15 | None | Moderate |
| Conneaut | Noneas of Jul 15 | None | Moderate |
| Salem | Noneas of Jul 15 | None | Moderate |
| Bucyrus | Noneas of Jul 15 | None | Moderate |
| Norton | Noneas of Jul 15 | None | Moderate |
| Ravenna | Noneas of Jul 15 | None | Moderate |
| Urbana | Noneas of Jul 15 | None | Moderate |
| Cambridge | Noneas of Jul 15 | None | Moderate |
| Long Bottom | Noneas of Jul 15 | None | Moderate |
| Lucasville | Noneas of Jul 15 | None | Moderate |
| Coshocton | Noneas of Jul 15 | None | Moderate |
| Summerfield | Noneas of Jul 15 | None | Moderate |
| Ironton | Noneas of Jul 15 | None | Moderate |
| Barnesville | Noneas of Jul 15 | None | Moderate |
| New Bremen | Noneas of Jul 15 | None | Moderate |
| Pomeroy | Noneas of Jul 15 | None | Moderate |
| Jamestown | Noneas of Jul 15 | None | Moderate |
| Gibsonburg | Noneas of Jul 15 | None | Moderate |
| South Point | Noneas of Jul 15 | None | Moderate |
| Port Clinton | Noneas of Jul 15 | None | Moderate |
| Leipsic | Noneas of Jul 15 | None | Moderate |
| Cortland | Noneas of Jul 15 | None | Moderate |
| Stryker | Noneas of Jul 15 | None | Moderate |
| Whitehouse | Noneas of Jul 15 | None | Moderate |
| Newton Falls | Noneas of Jul 15 | None | Moderate |
| Cedarville | Noneas of Jul 15 | None | Moderate |
| Wakeman | Noneas of Jul 15 | None | Moderate |
| Friendship | Noneas of Jul 15 | None | Moderate |
| Killbuck | Noneas of Jul 15 | None | Moderate |
| Doylestown | Noneas of Jul 15 | None | Moderate |
| New Knoxville | Noneas of Jul 15 | None | Moderate |
| Rootstown | Noneas of Jul 15 | None | Moderate |
| Clinton | Noneas of Jul 15 | None | Moderate |
| New London | Noneas of Jul 15 | None | Moderate |
| Atwater | Noneas of Jul 15 | None | Moderate |
| Shelby | Noneas of Jul 15 | None | Moderate |
| Dresden | Noneas of Jul 15 | None | Moderate |
| Lakeside Marblehead | Noneas of Jul 15 | None | Moderate |
| Howard | Noneas of Jul 15 | None | Moderate |
| Elmore | Noneas of Jul 15 | None | Moderate |
| Luckey | Noneas of Jul 15 | None | Moderate |
| Maplewood | Noneas of Jul 15 | None | Moderate |
| Ottawa | Noneas of Jul 15 | None | Moderate |
| Sullivan | Noneas of Jul 15 | None | Moderate |
| Franklin Furnace | Noneas of Jul 15 | None | Moderate |
| Pemberville | Noneas of Jul 15 | None | Moderate |
| Dennison | Noneas of Jul 15 | None | Moderate |
| Westland | Noneas of Jul 15 | None | Moderate |
| North Zanesville | Noneas of Jul 15 | None | Moderate |
| Portland | Noneas of Jul 15 | None | Moderate |
| Jefferson | Noneas of Jul 15 | None | Moderate |
| Hartville | Noneas of Jul 15 | None | Moderate |
| Walnut Creek | Noneas of Jul 15 | None | Moderate |
| Litchfield | Noneas of Jul 15 | None | Moderate |
| Gallipolis | Noneas of Jul 15 | None | Moderate |
| Van Wert | Noneas of Jul 15 | None | Moderate |
| North Jackson | Noneas of Jul 15 | None | Moderate |
| Mc Arthur | Noneas of Jul 15 | None | Moderate |
| Lake Milton | Noneas of Jul 15 | None | Moderate |
| Winchester | Noneas of Jul 15 | None | Moderate |
| Saint Clairsville | Noneas of Jul 15 | None | Moderate |
| Louisville | Noneas of Jul 15 | None | Moderate |
| Uniontown | Noneas of Jul 15 | None | Moderate |
| Millersburg | Noneas of Jul 15 | None | Moderate |
| Jackson | Noneas of Jul 15 | None | Moderate |
| Akron | No live reading | Not available | Moderate |
| Canton | No live reading | Not available | Moderate |
| Middletown | No live reading | Not available | Moderate |
| Parma | No live reading | Not available | Moderate |
| Mansfield | 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 |
| Beavercreek | No live reading | Not available | Moderate |
| Huber Heights | No live reading | Not available | Moderate |
| Delaware | No live reading | Not available | Moderate |
| Grove City | No live reading | Not available | Moderate |
| Reynoldsburg | No live reading | Not available | Moderate |
| Upper Arlington | No live reading | Not available | Moderate |
| North Ridgeville | No live reading | Not available | Moderate |
| Fairborn | No live reading | Not available | Moderate |
| Garfield 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 |
| Marysville | No live reading | Not available | Moderate |
| Avon Lake | No live reading | Not available | Moderate |
| Perrysburg | No live reading | Not available | Moderate |
| Sandusky | No live reading | Not available | Moderate |
| Maple Heights | No live reading | Not available | Moderate |
| Trotwood | No live reading | Not available | Moderate |
| Alliance | No live reading | Not available | Moderate |
| Rocky River | No live reading | Not available | Moderate |
| Piqua | No live reading | Not available | Moderate |
| Twinsburg | No live reading | Not available | Moderate |
| Niles | No live reading | Not available | Moderate |
| Pataskala | No live reading | Not available | Moderate |
| Tiffin | No live reading | Not available | Moderate |
| Streetsboro | No live reading | Not available | Moderate |
| Defiance | No live reading | Not available | Moderate |
| Middleburg Heights | No live reading | Not available | Moderate |
| Worthington | No live reading | Not available | Moderate |
| Willowick | No live reading | Not available | Moderate |
| Sharonville | No live reading | Not available | Moderate |
| Lyndhurst | No live reading | Not available | Moderate |
| New Franklin | No live reading | Not available | Moderate |
| Bridgetown | No live reading | Not available | Moderate |
| Harrison | 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 |
| Dover | No live reading | Not available | Moderate |
| Amherst | No live reading | Not available | Moderate |
| Amelia | No live reading | Not available | Moderate |
| Dent | No live reading | Not available | Moderate |
| Finneytown | No live reading | Not available | Moderate |
| Franklin | No live reading | Not available | Moderate |
| Mack | No live reading | Not available | Moderate |
| New Albany | No live reading | Not available | Moderate |
| Canal Winchester | No live reading | Not available | Moderate |
| Milford | No live reading | Not available | Moderate |
| Huron | No live reading | Not available | Moderate |
| Celina | No live reading | Not available | Moderate |
| Williamsburg | No live reading | Not available | Moderate |
| Thompson | No live reading | Not available | Moderate |
| Crestline | No live reading | Not available | Moderate |
| Kalida | No live reading | Not available | Moderate |
| Milan | No live reading | Not available | Moderate |
| Montpelier | No live reading | Not available | Moderate |
| Cleves | No live reading | Not available | Moderate |
| Covington | No live reading | Not available | Moderate |
| Wapakoneta | 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 |
| West Milton | No live reading | Not available | Moderate |
| Northfield | No live reading | Not available | Moderate |
| Magnetic Springs | No live reading | Not available | Moderate |
| Lynchburg | No live reading | Not available | Moderate |
| Rossmoyne | No live reading | Not available | Moderate |
| Carmel | No live reading | Not available | Moderate |
| Tipp City | 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 |
| Archbold | No live reading | Not available | Moderate |
| Wauseon | No live reading | Not available | Moderate |
| Yellow Springs | No live reading | Not available | Moderate |
| Boardman | No live reading | Not available | Moderate |
| Peebles | 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 |
| Bainbridge | 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 |
| Waterville | No live reading | Not available | Moderate |
| Mogadore | 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 |
| Brookville | 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 |
| Fort Jennings | No live reading | Not available | Moderate |
| Mcconnelsville | No live reading | Not available | Moderate |
| Chesapeake | No live reading | Not available | Moderate |
| North Bend | No live reading | Not available | Moderate |
| Bethel | No live reading | Not available | Moderate |
| Mayfield | No live reading | Not available | Moderate |
| Fairlawn | No live reading | Not available | Moderate |
| Madison | No live reading | Not available | Moderate |
| Anna | No live reading | Not available | Moderate |
| Maineville | No live reading | Not available | Moderate |
| Northfield Center | No live reading | Not available | Moderate |
| Obetz | No live reading | Not available | Moderate |
| Bellbrook | No live reading | Not available | Moderate |
| Mount Orab | No live reading | Not available | Moderate |
| Etna | No live reading | Not available | Moderate |
| Canal Fulton | No live reading | Not available | Moderate |
| Granville | No live reading | Not available | Moderate |
| Richmond Heights | No live reading | Not available | Moderate |
| Grafton | 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 |
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.