Maryland pollen and allergy seasons
July outlookModerate
Maryland has a strong spring tree season led by oak and a heavy ragweed season in the fall.
Twelve month pollen calendar
J
F
M
A
M
J
J
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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
April
Best month of the year
January
What is active in July
Grass
Cities in Maryland
| City | Today | Worst today | Typical in July |
|---|---|---|---|
| Baltimore | Very Highas of Jul 12 | Grass | Moderate |
| Catonsville | Very Highas of Jul 12 | Grass | Moderate |
| Woodlawn | Very Highas of Jul 12 | Grass | Moderate |
| Milford Mill | Very Highas of Jul 12 | Grass | Moderate |
| Langley Park | Very Highas of Jul 12 | Grass | Moderate |
| Hyattsville | Very Highas of Jul 12 | Grass | Moderate |
| Seabrook | Very Highas of Jul 12 | Grass | Moderate |
| Adelphi | Very Highas of Jul 12 | Grass | Moderate |
| Colesville | Very Highas of Jul 12 | Grass | Moderate |
| California | Very Highas of Jul 12 | Grass | Moderate |
| Green Valley | Very Highas of Jul 12 | Grass | Moderate |
| Rosaryville | Very Highas of Jul 12 | Grass | Moderate |
| Westphalia | Very Highas of Jul 12 | Grass | Moderate |
| Largo | Very Highas of Jul 12 | Grass | Moderate |
| Hydes | Very Highas of Jul 12 | Grass | Moderate |
| Leonardtown | Very Highas of Jul 12 | Grass | Moderate |
| Sparrows Point | Very Highas of Jul 12 | Grass | Moderate |
| Dayton | Very Highas of Jul 12 | Grass | Moderate |
| Marriottsville | Very Highas of Jul 12 | Grass | Moderate |
| Linthicum Heights | Very Highas of Jul 12 | Grass | Moderate |
| Churchton | Very Highas of Jul 12 | Grass | Moderate |
| Halethorpe | Very Highas of Jul 12 | Grass | Moderate |
| Stevenson | Very Highas of Jul 12 | Grass | Moderate |
| Indian Head | Very Highas of Jul 12 | Grass | Moderate |
| Chesapeake City | Very Highas of Jul 12 | Grass | Moderate |
| Boyds | Very Highas of Jul 12 | Grass | Moderate |
| Lake Arbor | Highas of Jul 12 | Grass | Moderate |
| Bensville | Highas of Jul 12 | Grass | Moderate |
| Hanover | Highas of Jul 12 | Grass | Moderate |
| Finksburg | Highas of Jul 12 | Grass | Moderate |
| Crownsville | Highas of Jul 12 | Grass | Moderate |
| Saint Michaels | Highas of Jul 12 | Grass | Moderate |
| Wheaton | Moderateas of Jul 12 | Grass | Moderate |
| Laurel | Moderateas of Jul 12 | Grass | Moderate |
| Elkridge | Moderateas of Jul 12 | Grass | Moderate |
| Annapolis Neck | Moderateas of Jul 12 | Grass | Moderate |
| Ocean Pines | Moderateas of Jul 12 | Grass | Moderate |
| Freeland | Moderateas of Jul 12 | Grass | Moderate |
| Berlin | Moderateas of Jul 12 | Grass | Moderate |
| Ocean City | Moderateas of Jul 12 | Grass | Moderate |
| Maryland City | Lowas of Jul 12 | Grass | Moderate |
| Jessup | Lowas of Jul 12 | Grass | Moderate |
| Hagerstown | No live reading | Not available | Moderate |
| Frederick | No live reading | Not available | Moderate |
| Waldorf | No live reading | Not available | Moderate |
| Columbia | No live reading | Not available | Moderate |
| Germantown | No live reading | Not available | Moderate |
| Silver Spring | No live reading | Not available | Moderate |
| Salisbury | No live reading | Not available | Moderate |
| Ellicott City | No live reading | Not available | Moderate |
| Glen Burnie | No live reading | Not available | Moderate |
| Gaithersburg | No live reading | Not available | Moderate |
| Bethesda | No live reading | Not available | Moderate |
| Rockville | No live reading | Not available | Moderate |
| Dundalk | No live reading | Not available | Moderate |
| Severn | No live reading | Not available | Moderate |
| Bowie | No live reading | Not available | Moderate |
| Bel Air South | No live reading | Not available | Moderate |
| Towson | No live reading | Not available | Moderate |
| Aspen Hill | No live reading | Not available | Moderate |
| North Bethesda | No live reading | Not available | Moderate |
| Potomac | No live reading | Not available | Moderate |
| Odenton | No live reading | Not available | Moderate |
| Annapolis | No live reading | Not available | Moderate |
| Essex | No live reading | Not available | Moderate |
| Severna Park | No live reading | Not available | Moderate |
| Clinton | No live reading | Not available | Moderate |
| Olney | No live reading | Not available | Moderate |
| Randallstown | No live reading | Not available | Moderate |
| Owings Mills | No live reading | Not available | Moderate |
| Chillum | No live reading | Not available | Moderate |
| College Park | No live reading | Not available | Moderate |
| Pikesville | No live reading | Not available | Moderate |
| Montgomery Village | No live reading | Not available | Moderate |
| Pasadena | No live reading | Not available | Moderate |
| Middle River | No live reading | Not available | Moderate |
| Bel Air North | No live reading | Not available | Moderate |
| Eldersburg | No live reading | Not available | Moderate |
| Parkville | No live reading | Not available | Moderate |
| Crofton | No live reading | Not available | Moderate |
| Clarksburg | No live reading | Not available | Moderate |
| Perry Hall | No live reading | Not available | Moderate |
| Carney | No live reading | Not available | Moderate |
| Reisterstown | No live reading | Not available | Moderate |
| South Laurel | No live reading | Not available | Moderate |
| Lochearn | No live reading | Not available | Moderate |
| Ilchester | No live reading | Not available | Moderate |
| Fairland | No live reading | Not available | Moderate |
| Ballenger Creek | No live reading | Not available | Moderate |
| Fort Washington | No live reading | Not available | Moderate |
| North Laurel | No live reading | Not available | Moderate |
| Edgewood | No live reading | Not available | Moderate |
| Suitland | No live reading | Not available | Moderate |
| Greenbelt | No live reading | Not available | Moderate |
| Landover | No live reading | Not available | Moderate |
| North Potomac | No live reading | Not available | Moderate |
| Arnold | No live reading | Not available | Moderate |
| Cockeysville | No live reading | Not available | Moderate |
| Camp Springs | No live reading | Not available | Moderate |
| Arbutus | No live reading | Not available | Moderate |
| Rosedale | No live reading | Not available | Moderate |
| Westminster | No live reading | Not available | Moderate |
| Beltsville | No live reading | Not available | Moderate |
| East Riverdale | No live reading | Not available | Moderate |
| Redland | No live reading | Not available | Moderate |
| Cumberland | No live reading | Not available | Moderate |
| Oxon Hill | No live reading | Not available | Moderate |
| Lake Shore | No live reading | Not available | Moderate |
| Parole | No live reading | Not available | Moderate |
| Calverton | No live reading | Not available | Moderate |
| Glassmanor | No live reading | Not available | Moderate |
| Takoma Park | No live reading | Not available | Moderate |
| Easton | No live reading | Not available | Moderate |
| Ferndale | No live reading | Not available | Moderate |
| Damascus | No live reading | Not available | Moderate |
| Aberdeen | No live reading | Not available | Moderate |
| Cloverly | No live reading | Not available | Moderate |
| Glenmont | No live reading | Not available | Moderate |
| White Oak | No live reading | Not available | Moderate |
| Elkton | No live reading | Not available | Moderate |
| Brooklyn Park | No live reading | Not available | Moderate |
| Hillcrest Heights | No live reading | Not available | Moderate |
| Summerfield | No live reading | Not available | Moderate |
| Mays Chapel | No live reading | Not available | Moderate |
| Rossville | No live reading | Not available | Moderate |
| Glenn Dale | No live reading | Not available | Moderate |
| Havre De Grace | No live reading | Not available | Moderate |
| Kemp Mill | No live reading | Not available | Moderate |
| Urbana | No live reading | Not available | Moderate |
| Kettering | No live reading | Not available | Moderate |
| Flower Hill | No live reading | Not available | Moderate |
| New Carrollton | No live reading | Not available | Moderate |
| Lexington Park | No live reading | Not available | Moderate |
| Brock Hall | No live reading | Not available | Moderate |
| Joppatowne | No live reading | Not available | Moderate |
| Accokeek | No live reading | Not available | Moderate |
| Cambridge | No live reading | Not available | Moderate |
| Linganore | No live reading | Not available | Moderate |
| Riviera Beach | No live reading | Not available | Moderate |
| Overlea | No live reading | Not available | Moderate |
| Honeygo | No live reading | Not available | Moderate |
| Lanham | No live reading | Not available | Moderate |
| Friendly | No live reading | Not available | Moderate |
| Mitchellville | No live reading | Not available | Moderate |
| Travilah | No live reading | Not available | Moderate |
| Chewsville | No live reading | Not available | Moderate |
| Stevensville | No live reading | Not available | Moderate |
| Chevy Chase | No live reading | Not available | Moderate |
| Brandywine | No live reading | Not available | Moderate |
| Vienna | No live reading | Not available | Moderate |
| Chesapeake Beach | No live reading | Not available | Moderate |
| Phoenix | No live reading | Not available | Moderate |
| Mechanicsville | No live reading | Not available | Moderate |
| Mount Airy | No live reading | Not available | Moderate |
| Edgewater | No live reading | Not available | Moderate |
| White Plains | No live reading | Not available | Moderate |
| Thurmont | No live reading | Not available | Moderate |
| La Plata | No live reading | Not available | Moderate |
| Sykesville | No live reading | Not available | Moderate |
| Forest Hill | No live reading | Not available | Moderate |
| Port Deposit | No live reading | Not available | Moderate |
| Gambrills | No live reading | Not available | Moderate |
| Middletown | No live reading | Not available | Moderate |
| North East | No live reading | Not available | Moderate |
| Queenstown | No live reading | Not available | Moderate |
| Monrovia | No live reading | Not available | Moderate |
| Millersville | No live reading | Not available | Moderate |
| Fulton | No live reading | Not available | Moderate |
| Lutherville Timonium | No live reading | Not available | Moderate |
| Hampstead | No live reading | Not available | Moderate |
| Nottingham | No live reading | Not available | Moderate |
| Davidsonville | No live reading | Not available | Moderate |
| Andrews Air Force Base | No live reading | Not available | Moderate |
| Huntingtown | No live reading | Not available | Moderate |
| Upper Marlboro | No live reading | Not available | Moderate |
| Boonsboro | No live reading | Not available | Moderate |
| Westover | No live reading | Not available | Moderate |
| Port Republic | No live reading | Not available | Moderate |
| Monkton | No live reading | Not available | Moderate |
| Denton | No live reading | Not available | Moderate |
| Whaleyville | No live reading | Not available | Moderate |
| Temple Hills | No live reading | Not available | Moderate |
| West Friendship | No live reading | Not available | Moderate |
| Poolesville | No live reading | Not available | Moderate |
| Jonoya (7) | No live reading | Not available | Moderate |
| Port Tobacco | No live reading | Not available | Moderate |
| Rising Sun | No live reading | Not available | Moderate |
| Sudlersville | No live reading | Not available | Moderate |
| Mount Rainier | No live reading | Not available | Moderate |
| Braddock Heights | No live reading | Not available | Moderate |
| North Kensington | No live reading | Not available | Moderate |
| Morrisville | No live reading | Not available | Moderate |
| Swanton | No live reading | Not available | Moderate |
| Manchester | No live reading | Not available | Moderate |
| Colmar Manor | No live reading | Not available | Moderate |
| Woodstock | No live reading | Not available | Moderate |
| Rohrersville | No live reading | Not available | Moderate |
| Bel Air | No live reading | Not available | Moderate |
| Centreville | No live reading | Not available | Moderate |
| Joppa | No live reading | Not available | Moderate |
| Pocomoke City | No live reading | Not available | Moderate |
| Delmar | No live reading | Not available | Moderate |
| Keedysville | No live reading | Not available | Moderate |
| Frostburg | No live reading | Not available | Moderate |
| Sugarland | No live reading | Not available | Moderate |
| Piscataway | No live reading | Not available | Moderate |
| Walkersville | No live reading | Not available | Moderate |
| White Hall | No live reading | Not available | Moderate |
| Windsor Mill | No live reading | Not available | Moderate |
| Dunbar | No live reading | Not available | Moderate |
| Myersville | No live reading | Not available | Moderate |
| Mchenry | No live reading | Not available | Moderate |
| Fallston | No live reading | Not available | Moderate |
| Bowleys Quarters | No live reading | Not available | Moderate |
| Charles Village | No live reading | Not available | Moderate |
| Tall Timbers | No live reading | Not available | Moderate |
| Jackson Ville Township | No live reading | Not available | Moderate |
| Crisfield | No live reading | Not available | Moderate |
| Saint Leonard | No live reading | Not available | Moderate |
| Smithsburg | No live reading | Not available | Moderate |
| Wa | No live reading | Not available | Moderate |
| Chesapeake Ranch Estates | No live reading | Not available | Moderate |
| Spring Hill | No live reading | Not available | Moderate |
| Brooklyn | No live reading | Not available | Moderate |
| Hughesville | No live reading | Not available | Moderate |
| Greensboro | No live reading | Not available | Moderate |
| Wye Mills | No live reading | Not available | Moderate |
| North Beach | No live reading | Not available | Moderate |
| Saint Johns Creek | No live reading | Not available | Moderate |
| Jefferson | No live reading | Not available | Moderate |
| Hollywood | No live reading | Not available | Moderate |
| Harwood | No live reading | Not available | Moderate |
| Burkittsville | No live reading | Not available | Moderate |
| Taneytown | No live reading | Not available | Moderate |
| Darlington | No live reading | Not available | Moderate |
| Chestertown | No live reading | Not available | Moderate |
| Woodbine | No live reading | Not available | Moderate |
| Kensington | No live reading | Not available | Moderate |
| Brunswick | No live reading | Not available | Moderate |
| Lusby | No live reading | Not available | Moderate |
| Washington Grove | No live reading | Not available | Moderate |
| Bishopville | No live reading | Not available | Moderate |
| Oakland | No live reading | Not available | Moderate |
| White Marsh | No live reading | Not available | Moderate |
| Point Of Rocks | No live reading | Not available | Moderate |
| Deale | No live reading | Not available | Moderate |
| Marion Station | No live reading | Not available | Moderate |
| Abingdon | No live reading | Not available | Moderate |
| Annapolis Junction | No live reading | Not available | Moderate |
| Grasonville | No live reading | Not available | Moderate |
| Knoxville | No live reading | Not available | Moderate |
| Clarksville | No live reading | Not available | Moderate |
| Brookeville | No live reading | Not available | Moderate |
| Sharpsburg | No live reading | Not available | Moderate |
| Capitol Heights | No live reading | Not available | Moderate |
| Prince Frederick | No live reading | Not available | Moderate |
| New Market | No live reading | Not available | Moderate |
| District Heights | No live reading | Not available | Moderate |
| Bryans Road | No live reading | Not available | Moderate |
| Sparks Glencoe | No live reading | Not available | Moderate |
| Charlotte Hall | No live reading | Not available | Moderate |
| Curtis Bay | No live reading | Not available | Moderate |
| Hunt Valley | No live reading | Not available | Moderate |
| Riva | 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 Maryland allergy season
Allergy levels in Maryland peak in April, when oak pollen runs highest. The season moves through tree pollen around April, grass in May, weed pollen such as ragweed in September. Levels start to climb around February. The lowest pollen levels of the year arrive in January.
Common questions
When does allergy season start in Maryland?
Pollen levels in Maryland usually begin climbing in February and reach their highest point in April.
What is the worst month for allergies in Maryland?
April is typically the worst month in Maryland, driven by oak pollen.
When does ragweed season end in Maryland?
Ragweed pollen in Maryland usually fades by the end of October, after the first hard frost in colder areas.
When is the best time for allergies in Maryland?
January usually brings the lowest pollen levels of the year in Maryland.