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

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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

April

Best month of the year

January

What is active in July

Grass

Moderate

Cities in Maryland

City	Today	Worst today	Typical in July
Germantown	Very Highas of Jul 15	Grass	Moderate
Salisbury	Very Highas of Jul 15	Grass	Moderate
Glen Burnie	Very Highas of Jul 15	Grass	Moderate
Dundalk	Very Highas of Jul 15	Grass	Moderate
Bel Air South	Very Highas of Jul 15	Grass	Moderate
Aspen Hill	Very Highas of Jul 15	Grass	Moderate
Odenton	Very Highas of Jul 15	Grass	Moderate
Annapolis	Very Highas of Jul 15	Grass	Moderate
Pasadena	Very Highas of Jul 15	Grass	Moderate
Middle River	Very Highas of Jul 15	Grass	Moderate
Parkville	Very Highas of Jul 15	Grass	Moderate
South Laurel	Very Highas of Jul 15	Grass	Moderate
Lochearn	Very Highas of Jul 15	Grass	Moderate
Ballenger Creek	Very Highas of Jul 15	Grass	Moderate
Arbutus	Very Highas of Jul 15	Grass	Moderate
East Riverdale	Very Highas of Jul 15	Grass	Moderate
Cumberland	Very Highas of Jul 15	Grass	Moderate
Takoma Park	Very Highas of Jul 15	Grass	Moderate
Aberdeen	Very Highas of Jul 15	Grass	Moderate
Glenmont	Very Highas of Jul 15	Grass	Moderate
White Oak	Very Highas of Jul 15	Grass	Moderate
Mays Chapel	Very Highas of Jul 15	Grass	Moderate
Rossville	Very Highas of Jul 15	Grass	Moderate
Lexington Park	Very Highas of Jul 15	Grass	Moderate
Joppatowne	Very Highas of Jul 15	Grass	Moderate
Overlea	Very Highas of Jul 15	Grass	Moderate
Friendly	Very Highas of Jul 15	Grass	Moderate
Chevy Chase	Very Highas of Jul 15	Grass	Moderate
Vienna	Very Highas of Jul 15	Grass	Moderate
Hunt Valley	Very Highas of Jul 15	Grass	Moderate
La Plata	Very Highas of Jul 15	Grass	Moderate
North East	Very Highas of Jul 15	Grass	Moderate
Nottingham	Very Highas of Jul 15	Grass	Moderate
Davidsonville	Very Highas of Jul 15	Grass	Moderate
Millersville	Very Highas of Jul 15	Grass	Moderate
Upper Marlboro	Very Highas of Jul 15	Grass	Moderate
Monkton	Very Highas of Jul 15	Grass	Moderate
Temple Hills	Very Highas of Jul 15	Grass	Moderate
Poolesville	Very Highas of Jul 15	Grass	Moderate
Rising Sun	Very Highas of Jul 15	Grass	Moderate
Sudlersville	Very Highas of Jul 15	Grass	Moderate
Swanton	Very Highas of Jul 15	Grass	Moderate
Manchester	Very Highas of Jul 15	Grass	Moderate
Colmar Manor	Very Highas of Jul 15	Grass	Moderate
Freeland	Very Highas of Jul 15	Grass	Moderate
Centreville	Very Highas of Jul 15	Grass	Moderate
Joppa	Very Highas of Jul 15	Grass	Moderate
Keedysville	Very Highas of Jul 15	Grass	Moderate
Sugarland	Very Highas of Jul 15	Grass	Moderate
Piscataway	Very Highas of Jul 15	Grass	Moderate
Windsor Mill	Very Highas of Jul 15	Grass	Moderate
Dunbar	Very Highas of Jul 15	Grass	Moderate
Myersville	Very Highas of Jul 15	Grass	Moderate
Smithsburg	Very Highas of Jul 15	Grass	Moderate
Chesapeake Ranch Estates	Very Highas of Jul 15	Grass	Moderate
Stevenson	Very Highas of Jul 15	Grass	Moderate
Indian Head	Very Highas of Jul 15	Grass	Moderate
Hughesville	Very Highas of Jul 15	Grass	Moderate
Saint Johns Creek	Very Highas of Jul 15	Grass	Moderate
Jefferson	Very Highas of Jul 15	Grass	Moderate
Hollywood	Very Highas of Jul 15	Grass	Moderate
Harwood	Very Highas of Jul 15	Grass	Moderate
Burkittsville	Very Highas of Jul 15	Grass	Moderate
Saint Michaels	Very Highas of Jul 15	Grass	Moderate
Ocean City	Very Highas of Jul 15	Grass	Moderate
Kensington	Very Highas of Jul 15	Grass	Moderate
Brunswick	Very Highas of Jul 15	Grass	Moderate
Deale	Very Highas of Jul 15	Grass	Moderate
Grasonville	Very Highas of Jul 15	Grass	Moderate
Prince Frederick	Very Highas of Jul 15	Grass	Moderate
New Market	Very Highas of Jul 15	Grass	Moderate
District Heights	Very Highas of Jul 15	Grass	Moderate
Baltimore	Highas of Jul 15	Grass	Moderate
Hagerstown	Highas of Jul 15	Grass	Moderate
Frederick	Highas of Jul 15	Grass	Moderate
Columbia	Highas of Jul 15	Grass	Moderate
Ellicott City	Highas of Jul 15	Grass	Moderate
Gaithersburg	Highas of Jul 15	Grass	Moderate
Essex	Highas of Jul 15	Grass	Moderate
Bel Air North	Highas of Jul 15	Grass	Moderate
Ilchester	Highas of Jul 15	Grass	Moderate
Fairland	Highas of Jul 15	Grass	Moderate
Suitland	Highas of Jul 15	Grass	Moderate
Hyattsville	Highas of Jul 15	Grass	Moderate
Westminster	Highas of Jul 15	Grass	Moderate
Redland	Highas of Jul 15	Grass	Moderate
Maryland City	Highas of Jul 15	Grass	Moderate
Glassmanor	Highas of Jul 15	Grass	Moderate
Elkton	Highas of Jul 15	Grass	Moderate
New Carrollton	Highas of Jul 15	Grass	Moderate
Accokeek	Highas of Jul 15	Grass	Moderate
California	Highas of Jul 15	Grass	Moderate
Ocean Pines	Highas of Jul 15	Grass	Moderate
Largo	Highas of Jul 15	Grass	Moderate
Mitchellville	Highas of Jul 15	Grass	Moderate
Travilah	Highas of Jul 15	Grass	Moderate
Stevensville	Highas of Jul 15	Grass	Moderate
Hanover	Highas of Jul 15	Grass	Moderate
Edgewater	Highas of Jul 15	Grass	Moderate
Hydes	Highas of Jul 15	Grass	Moderate
Hampstead	Highas of Jul 15	Grass	Moderate
Westover	Highas of Jul 15	Grass	Moderate
Whaleyville	Highas of Jul 15	Grass	Moderate
Port Tobacco	Highas of Jul 15	Grass	Moderate
Linthicum Heights	Highas of Jul 15	Grass	Moderate
Bel Air	Highas of Jul 15	Grass	Moderate
Rohrersville	Highas of Jul 15	Grass	Moderate
Delmar	Highas of Jul 15	Grass	Moderate
Frostburg	Highas of Jul 15	Grass	Moderate
Walkersville	Highas of Jul 15	Grass	Moderate
White Hall	Highas of Jul 15	Grass	Moderate
Mchenry	Highas of Jul 15	Grass	Moderate
Tall Timbers	Highas of Jul 15	Grass	Moderate
Greensboro	Highas of Jul 15	Grass	Moderate
Darlington	Highas of Jul 15	Grass	Moderate
Washington Grove	Highas of Jul 15	Grass	Moderate
Bishopville	Highas of Jul 15	Grass	Moderate
Marion Station	Highas of Jul 15	Grass	Moderate
Abingdon	Highas of Jul 15	Grass	Moderate
Annapolis Junction	Highas of Jul 15	Grass	Moderate
Knoxville	Highas of Jul 15	Grass	Moderate
Brookeville	Highas of Jul 15	Grass	Moderate
Sparks Glencoe	Highas of Jul 15	Grass	Moderate
Charlotte Hall	Highas of Jul 15	Grass	Moderate
Boyds	Highas of Jul 15	Grass	Moderate
Waldorf	Moderateas of Jul 15	Grass	Moderate
Silver Spring	Moderateas of Jul 15	Grass	Moderate
Bethesda	Moderateas of Jul 15	Grass	Moderate
Rockville	Moderateas of Jul 15	Grass	Moderate
Severn	Moderateas of Jul 15	Grass	Moderate
Bowie	Moderateas of Jul 15	Grass	Moderate
Towson	Moderateas of Jul 15	Grass	Moderate
Wheaton	Moderateas of Jul 15	Grass	Moderate
Potomac	Moderateas of Jul 15	Grass	Moderate
Woodlawn	Moderateas of Jul 15	Grass	Moderate
Severna Park	Moderateas of Jul 15	Grass	Moderate
Olney	Moderateas of Jul 15	Grass	Moderate
Randallstown	Moderateas of Jul 15	Grass	Moderate
Owings Mills	Moderateas of Jul 15	Grass	Moderate
Chillum	Moderateas of Jul 15	Grass	Moderate
College Park	Moderateas of Jul 15	Grass	Moderate
Pikesville	Moderateas of Jul 15	Grass	Moderate
Montgomery Village	Moderateas of Jul 15	Grass	Moderate
Milford Mill	Moderateas of Jul 15	Grass	Moderate
Eldersburg	Moderateas of Jul 15	Grass	Moderate
Laurel	Moderateas of Jul 15	Grass	Moderate
Clarksburg	Moderateas of Jul 15	Grass	Moderate
Perry Hall	Moderateas of Jul 15	Grass	Moderate
Carney	Moderateas of Jul 15	Grass	Moderate
Reisterstown	Moderateas of Jul 15	Grass	Moderate
Elkridge	Moderateas of Jul 15	Grass	Moderate
Fort Washington	Moderateas of Jul 15	Grass	Moderate
North Laurel	Moderateas of Jul 15	Grass	Moderate
Edgewood	Moderateas of Jul 15	Grass	Moderate
Landover	Moderateas of Jul 15	Grass	Moderate
North Potomac	Moderateas of Jul 15	Grass	Moderate
Arnold	Moderateas of Jul 15	Grass	Moderate
Cockeysville	Moderateas of Jul 15	Grass	Moderate
Camp Springs	Moderateas of Jul 15	Grass	Moderate
Langley Park	Moderateas of Jul 15	Grass	Moderate
Beltsville	Moderateas of Jul 15	Grass	Moderate
Lake Shore	Moderateas of Jul 15	Grass	Moderate
Parole	Moderateas of Jul 15	Grass	Moderate
Calverton	Moderateas of Jul 15	Grass	Moderate
Adelphi	Moderateas of Jul 15	Grass	Moderate
Easton	Moderateas of Jul 15	Grass	Moderate
Ferndale	Moderateas of Jul 15	Grass	Moderate
Damascus	Moderateas of Jul 15	Grass	Moderate
Hillcrest Heights	Moderateas of Jul 15	Grass	Moderate
Summerfield	Moderateas of Jul 15	Grass	Moderate
Lake Arbor	Moderateas of Jul 15	Grass	Moderate
Glenn Dale	Moderateas of Jul 15	Grass	Moderate
Havre De Grace	Moderateas of Jul 15	Grass	Moderate
Bensville	Moderateas of Jul 15	Grass	Moderate
Flower Hill	Moderateas of Jul 15	Grass	Moderate
Brock Hall	Moderateas of Jul 15	Grass	Moderate
Annapolis Neck	Moderateas of Jul 15	Grass	Moderate
Rosaryville	Moderateas of Jul 15	Grass	Moderate
Westphalia	Moderateas of Jul 15	Grass	Moderate
Lanham	Moderateas of Jul 15	Grass	Moderate
Phoenix	Moderateas of Jul 15	Grass	Moderate
Mechanicsville	Moderateas of Jul 15	Grass	Moderate
Mount Airy	Moderateas of Jul 15	Grass	Moderate
Chesapeake Beach	Moderateas of Jul 15	Grass	Moderate
Sykesville	Moderateas of Jul 15	Grass	Moderate
Forest Hill	Moderateas of Jul 15	Grass	Moderate
Port Deposit	Moderateas of Jul 15	Grass	Moderate
Gambrills	Moderateas of Jul 15	Grass	Moderate
Queenstown	Moderateas of Jul 15	Grass	Moderate
Monrovia	Moderateas of Jul 15	Grass	Moderate
White Plains	Moderateas of Jul 15	Grass	Moderate
Fulton	Moderateas of Jul 15	Grass	Moderate
Leonardtown	Moderateas of Jul 15	Grass	Moderate
Andrews Air Force Base	Moderateas of Jul 15	Grass	Moderate
Huntingtown	Moderateas of Jul 15	Grass	Moderate
Boonsboro	Moderateas of Jul 15	Grass	Moderate
Port Republic	Moderateas of Jul 15	Grass	Moderate
Dayton	Moderateas of Jul 15	Grass	Moderate
West Friendship	Moderateas of Jul 15	Grass	Moderate
Marriottsville	Moderateas of Jul 15	Grass	Moderate
Braddock Heights	Moderateas of Jul 15	Grass	Moderate
Churchton	Moderateas of Jul 15	Grass	Moderate
Pocomoke City	Moderateas of Jul 15	Grass	Moderate
Halethorpe	Moderateas of Jul 15	Grass	Moderate
Fallston	Moderateas of Jul 15	Grass	Moderate
Crownsville	Moderateas of Jul 15	Grass	Moderate
Charles Village	Moderateas of Jul 15	Grass	Moderate
Brooklyn	Moderateas of Jul 15	Grass	Moderate
Berlin	Moderateas of Jul 15	Grass	Moderate
Wye Mills	Moderateas of Jul 15	Grass	Moderate
Chesapeake City	Moderateas of Jul 15	Grass	Moderate
Taneytown	Moderateas of Jul 15	Grass	Moderate
Woodbine	Moderateas of Jul 15	Grass	Moderate
Oakland	Moderateas of Jul 15	Grass	Moderate
White Marsh	Moderateas of Jul 15	Grass	Moderate
Clarksville	Moderateas of Jul 15	Grass	Moderate
Capitol Heights	Moderateas of Jul 15	Grass	Moderate
Curtis Bay	Moderateas of Jul 15	Grass	Moderate
Riva	Moderateas of Jul 15	Grass	Moderate
Jonoya (7)	Noneas of Jul 15	None	Moderate
Jackson Ville Township	Noneas of Jul 15	None	Moderate
Wa	Noneas of Jul 15	None	Moderate
North Bethesda	No live reading	Not available	Moderate
Catonsville	No live reading	Not available	Moderate
Clinton	No live reading	Not available	Moderate
Crofton	No live reading	Not available	Moderate
Greenbelt	No live reading	Not available	Moderate
Rosedale	No live reading	Not available	Moderate
Seabrook	No live reading	Not available	Moderate
Oxon Hill	No live reading	Not available	Moderate
Cloverly	No live reading	Not available	Moderate
Brooklyn Park	No live reading	Not available	Moderate
Kemp Mill	No live reading	Not available	Moderate
Colesville	No live reading	Not available	Moderate
Urbana	No live reading	Not available	Moderate
Kettering	No live reading	Not available	Moderate
Green Valley	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
Honeygo	No live reading	Not available	Moderate
Bryans Road	No live reading	Not available	Moderate
Thurmont	No live reading	Not available	Moderate
Middletown	No live reading	Not available	Moderate
Lutherville Timonium	No live reading	Not available	Moderate
Sparrows Point	No live reading	Not available	Moderate
Jessup	No live reading	Not available	Moderate
Finksburg	No live reading	Not available	Moderate
Denton	No live reading	Not available	Moderate
Accident	No live reading	Not available	Moderate
Mount Rainier	No live reading	Not available	Moderate
North Kensington	No live reading	Not available	Moderate
Morrisville	No live reading	Not available	Moderate
Woodstock	No live reading	Not available	Moderate
Bowleys Quarters	No live reading	Not available	Moderate
Crisfield	No live reading	Not available	Moderate
Saint Leonard	No live reading	Not available	Moderate
Spring Hill	No live reading	Not available	Moderate
North Beach	No live reading	Not available	Moderate
Chestertown	No live reading	Not available	Moderate
Lusby	No live reading	Not available	Moderate
Point Of Rocks	No live reading	Not available	Moderate
Sharpsburg	No live reading	Not available	Moderate
Chewsville	No live reading	Not available	Moderate
Brandywine	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.