Massachusetts pollen and allergy seasons
July outlookModerate
Massachusetts has a spring tree season and a strong ragweed season in late summer and early 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
September
Best month of the year
January
What is active in July
Grass
Cities in Massachusetts
| City | Today | Worst today | Typical in July |
|---|---|---|---|
| Boston | Very Highas of Jul 15 | Grass | Moderate |
| New Bedford | Very Highas of Jul 15 | Grass | Moderate |
| Lowell | Very Highas of Jul 15 | Grass | Moderate |
| Leominster | Very Highas of Jul 15 | Grass | Moderate |
| Brockton | Very Highas of Jul 15 | Grass | Moderate |
| Lynn | Very Highas of Jul 15 | Grass | Moderate |
| Waltham | Very Highas of Jul 15 | Grass | Moderate |
| Chicopee | Very Highas of Jul 15 | Grass | Moderate |
| Woburn | Very Highas of Jul 15 | Grass | Moderate |
| Chelsea | Very Highas of Jul 15 | Grass | Moderate |
| Holyoke | Very Highas of Jul 15 | Grass | Moderate |
| Melrose | Very Highas of Jul 15 | Grass | Moderate |
| Northampton | Very Highas of Jul 15 | Grass | Moderate |
| Gardner | Very Highas of Jul 15 | Grass | Moderate |
| Newburyport | Very Highas of Jul 15 | Grass | Moderate |
| Holden | Very Highas of Jul 15 | Grass | Moderate |
| Colrain | Very Highas of Jul 15 | Grass | Moderate |
| Somerset | Very Highas of Jul 15 | Grass | Moderate |
| Templeton | Very Highas of Jul 15 | Grass | Moderate |
| Framingham Center | Very Highas of Jul 15 | Grass | Moderate |
| Byfield | Very Highas of Jul 15 | Grass | Moderate |
| Manchester | Very Highas of Jul 15 | Grass | Moderate |
| Sherborn | Very Highas of Jul 15 | Grass | Moderate |
| Weston | Very Highas of Jul 15 | Grass | Moderate |
| Pembroke | Very Highas of Jul 15 | Grass | Moderate |
| Carver | Very Highas of Jul 15 | Grass | Moderate |
| Ashfield | Very Highas of Jul 15 | Grass | Moderate |
| White Horse Beach | Very Highas of Jul 15 | Grass | Moderate |
| Feeding Hills | Very Highas of Jul 15 | Grass | Moderate |
| Barre | Very Highas of Jul 15 | Grass | Moderate |
| Needham | Very Highas of Jul 15 | Grass | Moderate |
| Plainville | Very Highas of Jul 15 | Grass | Moderate |
| Whitinsville | Very Highas of Jul 15 | Grass | Moderate |
| Upton | Very Highas of Jul 15 | Grass | Moderate |
| Wendell | Very Highas of Jul 15 | Grass | Moderate |
| Haydenville | Very Highas of Jul 15 | Grass | Moderate |
| Webster | Very Highas of Jul 15 | Grass | Moderate |
| Waverley | Very Highas of Jul 15 | Grass | Moderate |
| Greenfield | Very Highas of Jul 15 | Grass | Moderate |
| Wilmington | Very Highas of Jul 15 | Grass | Moderate |
| Douglas | Very Highas of Jul 15 | Grass | Moderate |
| Dracut | Very Highas of Jul 15 | Grass | Moderate |
| East Longmeadow | Very Highas of Jul 15 | Grass | Moderate |
| Oxford | Very Highas of Jul 15 | Grass | Moderate |
| Roxbury | Very Highas of Jul 15 | Grass | Moderate |
| Randolph | Very Highas of Jul 15 | Grass | Moderate |
| Watertown | Very Highas of Jul 15 | Grass | Moderate |
| Wellesley Hills | Very Highas of Jul 15 | Grass | Moderate |
| Reading | Very Highas of Jul 15 | Grass | Moderate |
| South Weymouth | Very Highas of Jul 15 | Grass | Moderate |
| Lexington | Very Highas of Jul 15 | Grass | Moderate |
| Plymouth | Very Highas of Jul 15 | Grass | Moderate |
| Wilbraham | Very Highas of Jul 15 | Grass | Moderate |
| South Easton | Very Highas of Jul 15 | Grass | Moderate |
| Wayland | Very Highas of Jul 15 | Grass | Moderate |
| Amesbury | Very Highas of Jul 15 | Grass | Moderate |
| Leeds | Very Highas of Jul 15 | Grass | Moderate |
| Billerica | Very Highas of Jul 15 | Grass | Moderate |
| Charlton | Very Highas of Jul 15 | Grass | Moderate |
| Amherst | Very Highas of Jul 15 | Grass | Moderate |
| Fairhaven | Very Highas of Jul 15 | Grass | Moderate |
| Tyngsboro | Very Highas of Jul 15 | Grass | Moderate |
| Ashby | Very Highas of Jul 15 | Grass | Moderate |
| Acton | Very Highas of Jul 15 | Grass | Moderate |
| Bedford | Very Highas of Jul 15 | Grass | Moderate |
| Westford | Very Highas of Jul 15 | Grass | Moderate |
| Brighton | Very Highas of Jul 15 | Grass | Moderate |
| Sharon | Very Highas of Jul 15 | Grass | Moderate |
| Holliston | Very Highas of Jul 15 | Grass | Moderate |
| Stoughton | Very Highas of Jul 15 | Grass | Moderate |
| Shrewsbury | Very Highas of Jul 15 | Grass | Moderate |
| East Wareham | Very Highas of Jul 15 | Grass | Moderate |
| Belmont | Very Highas of Jul 15 | Grass | Moderate |
| Wrentham | Very Highas of Jul 15 | Grass | Moderate |
| Adams | Very Highas of Jul 15 | Grass | Moderate |
| Sandisfield | Very Highas of Jul 15 | Grass | Moderate |
| Medway | Very Highas of Jul 15 | Grass | Moderate |
| Tewksbury | Very Highas of Jul 15 | Grass | Moderate |
| Canton | Very Highas of Jul 15 | Grass | Moderate |
| Swansea | Very Highas of Jul 15 | Grass | Moderate |
| Sudbury | Very Highas of Jul 15 | Grass | Moderate |
| Southampton | Very Highas of Jul 15 | Grass | Moderate |
| Middleboro | Very Highas of Jul 15 | Grass | Moderate |
| Stockbridge | Very Highas of Jul 15 | Grass | Moderate |
| Ware | Very Highas of Jul 15 | Grass | Moderate |
| Ipswich | Very Highas of Jul 15 | Grass | Moderate |
| Amherst Center | Very Highas of Jul 15 | Grass | Moderate |
| East Freetown | Very Highas of Jul 15 | Grass | Moderate |
| Hadley | Very Highas of Jul 15 | Grass | Moderate |
| Southbridge | Very Highas of Jul 15 | Grass | Moderate |
| South Boston | Very Highas of Jul 15 | Grass | Moderate |
| Hinsdale | Very Highas of Jul 15 | Grass | Moderate |
| Belchertown | Very Highas of Jul 15 | Grass | Moderate |
| Housatonic | Very Highas of Jul 15 | Grass | Moderate |
| Indian Lake Estates | Very Highas of Jul 15 | Grass | Moderate |
| Bellingham | Very Highas of Jul 15 | Grass | Moderate |
| Princeton | Very Highas of Jul 15 | Grass | Moderate |
| Worcester | Highas of Jul 15 | Grass | Moderate |
| Cambridge | Highas of Jul 15 | Grass | Moderate |
| Fall River | Highas of Jul 15 | Grass | Moderate |
| Malden | Highas of Jul 15 | Grass | Moderate |
| Medford | Highas of Jul 15 | Grass | Moderate |
| Peabody | Highas of Jul 15 | Grass | Moderate |
| Westfield | Highas of Jul 15 | Grass | Moderate |
| Milford | Highas of Jul 15 | Grass | Moderate |
| Dudley | Highas of Jul 15 | Grass | Moderate |
| Shirley | Highas of Jul 15 | Grass | Moderate |
| Back Bay | Highas of Jul 15 | Grass | Moderate |
| North Dartmouth | Highas of Jul 15 | Grass | Moderate |
| West Newton | Highas of Jul 15 | Grass | Moderate |
| Manomet | Highas of Jul 15 | Grass | Moderate |
| Easton | Highas of Jul 15 | Grass | Moderate |
| Kingston | Highas of Jul 15 | Grass | Moderate |
| Palmer | Highas of Jul 15 | Grass | Moderate |
| Indian Orchard | Highas of Jul 15 | Grass | Moderate |
| Halifax | Highas of Jul 15 | Grass | Moderate |
| Methuen | Highas of Jul 15 | Grass | Moderate |
| Northborough | Highas of Jul 15 | Grass | Moderate |
| Royalston | Highas of Jul 15 | Grass | Moderate |
| Grafton | Highas of Jul 15 | Grass | Moderate |
| Weymouth | Highas of Jul 15 | Grass | Moderate |
| Three Rivers | Highas of Jul 15 | Grass | Moderate |
| Agawam | Highas of Jul 15 | Grass | Moderate |
| Topsfield | Highas of Jul 15 | Grass | Moderate |
| Rowley | Highas of Jul 15 | Grass | Moderate |
| Stoneham | Highas of Jul 15 | Grass | Moderate |
| Roslindale | Highas of Jul 15 | Grass | Moderate |
| Granville | Highas of Jul 15 | Grass | Moderate |
| Groton | Highas of Jul 15 | Grass | Moderate |
| North Andover | Highas of Jul 15 | Grass | Moderate |
| Hanson | Highas of Jul 15 | Grass | Moderate |
| Brookline | Highas of Jul 15 | Grass | Moderate |
| Saugus | Highas of Jul 15 | Grass | Moderate |
| Mendon | Highas of Jul 15 | Grass | Moderate |
| North Billerica | Highas of Jul 15 | Grass | Moderate |
| Marion | Highas of Jul 15 | Grass | Moderate |
| Littleton | Highas of Jul 15 | Grass | Moderate |
| West Roxbury | Highas of Jul 15 | Grass | Moderate |
| Sheldonville | Highas of Jul 15 | Grass | Moderate |
| Harvard | Highas of Jul 15 | Grass | Moderate |
| Warwick | Highas of Jul 15 | Grass | Moderate |
| Jamaica Plain | Highas of Jul 15 | Grass | Moderate |
| Dorchester Center | Highas of Jul 15 | Grass | Moderate |
| Rutland | Highas of Jul 15 | Grass | Moderate |
| Wareham | Highas of Jul 15 | Grass | Moderate |
| South Deerfield | Highas of Jul 15 | Grass | Moderate |
| Marshfield | Highas of Jul 15 | Grass | Moderate |
| Allston | Highas of Jul 15 | Grass | Moderate |
| Hull | Highas of Jul 15 | Grass | Moderate |
| Cambridgeport | Highas of Jul 15 | Grass | Moderate |
| Springfield | Moderateas of Jul 15 | Grass | Moderate |
| Quincy | Moderateas of Jul 15 | Grass | Moderate |
| Newton | Moderateas of Jul 15 | Grass | Moderate |
| Lawrence | Moderateas of Jul 15 | Grass | Moderate |
| Somerville | Moderateas of Jul 15 | Grass | Moderate |
| Framingham | Moderateas of Jul 15 | Grass | Moderate |
| Haverhill | Moderateas of Jul 15 | Grass | Moderate |
| Revere | Moderateas of Jul 15 | Grass | Moderate |
| Taunton | Moderateas of Jul 15 | Grass | Moderate |
| Methuen Town | Moderateas of Jul 15 | Grass | Moderate |
| Everett | Moderateas of Jul 15 | Grass | Moderate |
| Attleboro | Moderateas of Jul 15 | Grass | Moderate |
| Salem | Moderateas of Jul 15 | Grass | Moderate |
| Beverly | Moderateas of Jul 15 | Grass | Moderate |
| Fitchburg | Moderateas of Jul 15 | Grass | Moderate |
| Watertown Town | Moderateas of Jul 15 | Grass | Moderate |
| Gloucester | Moderateas of Jul 15 | Grass | Moderate |
| North Adams | Moderateas of Jul 15 | Grass | Moderate |
| Rockland | Moderateas of Jul 15 | Grass | Moderate |
| Westwood | Moderateas of Jul 15 | Grass | Moderate |
| Attleborough City | Moderateas of Jul 15 | Grass | Moderate |
| Rockport | Moderateas of Jul 15 | Grass | Moderate |
| Onset | Moderateas of Jul 15 | Grass | Moderate |
| North Grafton | Moderateas of Jul 15 | Grass | Moderate |
| Westminster | Moderateas of Jul 15 | Grass | Moderate |
| Hanover | Moderateas of Jul 15 | Grass | Moderate |
| Goshen | Moderateas of Jul 15 | Grass | Moderate |
| Rochester | Moderateas of Jul 15 | Grass | Moderate |
| Boylston | Moderateas of Jul 15 | Grass | Moderate |
| Pepperell | Moderateas of Jul 15 | Grass | Moderate |
| Natick | Moderateas of Jul 15 | Grass | Moderate |
| Newbury | Moderateas of Jul 15 | Grass | Moderate |
| Danvers | Moderateas of Jul 15 | Grass | Moderate |
| Buzzards Bay | Moderateas of Jul 15 | Grass | Moderate |
| Essex | Moderateas of Jul 15 | Grass | Moderate |
| Westport Factory | Moderateas of Jul 15 | Grass | Moderate |
| West Brookfield | Moderateas of Jul 15 | Grass | Moderate |
| Chelmsford | Moderateas of Jul 15 | Grass | Moderate |
| Bridgewater | Moderateas of Jul 15 | Grass | Moderate |
| Maynard | Moderateas of Jul 15 | Grass | Moderate |
| Norton | Moderateas of Jul 15 | Grass | Moderate |
| Ashland | Moderateas of Jul 15 | Grass | Moderate |
| Winchester | Moderateas of Jul 15 | Grass | Moderate |
| Wakefield | Moderateas of Jul 15 | Grass | Moderate |
| Westport | Moderateas of Jul 15 | Grass | Moderate |
| Erving | Moderateas of Jul 15 | Grass | Moderate |
| Andover | Moderateas of Jul 15 | Grass | Moderate |
| Millbury | Moderateas of Jul 15 | Grass | Moderate |
| Ludlow | Moderateas of Jul 15 | Grass | Moderate |
| North Amherst | Moderateas of Jul 15 | Grass | Moderate |
| Milton | Moderateas of Jul 15 | Grass | Moderate |
| Georgetown | Moderateas of Jul 15 | Grass | Moderate |
| Paxton | Moderateas of Jul 15 | Grass | Moderate |
| Longmeadow | Moderateas of Jul 15 | Grass | Moderate |
| North Attleboro | Moderateas of Jul 15 | Grass | Moderate |
| Duxbury | Moderateas of Jul 15 | Grass | Moderate |
| Dover | Moderateas of Jul 15 | Grass | Moderate |
| Concord | Moderateas of Jul 15 | Grass | Moderate |
| Wellesley | Moderateas of Jul 15 | Grass | Moderate |
| Swampscott | Moderateas of Jul 15 | Grass | Moderate |
| East Bridgewater | Moderateas of Jul 15 | Grass | Moderate |
| Sterling | Moderateas of Jul 15 | Grass | Moderate |
| Hopkinton | Moderateas of Jul 15 | Grass | Moderate |
| Franklin | Moderateas of Jul 15 | Grass | Moderate |
| Southwick | Moderateas of Jul 15 | Grass | Moderate |
| East Walpole | Moderateas of Jul 15 | Grass | Moderate |
| Marblehead | Moderateas of Jul 15 | Grass | Moderate |
| Burlington | Moderateas of Jul 15 | Grass | Moderate |
| Uxbridge | Moderateas of Jul 15 | Grass | Moderate |
| Walpole | Moderateas of Jul 15 | Grass | Moderate |
| Lynnfield | Moderateas of Jul 15 | Grass | Moderate |
| Newton Center | Moderateas of Jul 15 | Grass | Moderate |
| Westborough | Moderateas of Jul 15 | Grass | Moderate |
| Braintree | Moderateas of Jul 15 | Grass | Moderate |
| Dedham | Moderateas of Jul 15 | Grass | Moderate |
| West Springfield | Moderateas of Jul 15 | Grass | Moderate |
| Mansfield | Moderateas of Jul 15 | Grass | Moderate |
| Bourne | Moderateas of Jul 15 | Grass | Moderate |
| Mattapoisett | Moderateas of Jul 15 | Grass | Moderate |
| Lakeville | Moderateas of Jul 15 | Grass | Moderate |
| Baldwinville | Moderateas of Jul 15 | Grass | Moderate |
| Medfield | Moderateas of Jul 15 | Grass | Moderate |
| Norwood | Moderateas of Jul 15 | Grass | Moderate |
| Downtown Crossing | Moderateas of Jul 15 | Grass | Moderate |
| Brookline Village | Moderateas of Jul 15 | Grass | Moderate |
| New Marlborough | Moderateas of Jul 15 | Grass | Moderate |
| Newtonville | Moderateas of Jul 15 | Grass | Moderate |
| Lanesboro | Moderateas of Jul 15 | Grass | Moderate |
| Assonet | Moderateas of Jul 15 | Grass | Moderate |
| Arlington | Moderateas of Jul 15 | Grass | Moderate |
| Rehoboth | Moderateas of Jul 15 | Grass | Moderate |
| Florence | Moderateas of Jul 15 | Grass | Moderate |
| Foxboro | Moderateas of Jul 15 | Grass | Moderate |
| Easthampton | Moderateas of Jul 15 | Grass | Moderate |
| Russells Mills | Moderateas of Jul 15 | Grass | Moderate |
| Lenox | Moderateas of Jul 15 | Grass | Moderate |
| Scituate | Moderateas of Jul 15 | Grass | Moderate |
| Charlestown | Moderateas of Jul 15 | Grass | Moderate |
| South Hamilton | Moderateas of Jul 15 | Grass | Moderate |
| Abington | Moderateas of Jul 15 | Grass | Moderate |
| South Yarmouth | Noneas of Jul 15 | None | Moderate |
| East Falmouth | Noneas of Jul 15 | None | Moderate |
| East Dennis | Noneas of Jul 15 | None | Moderate |
| Acapesket | Noneas of Jul 15 | None | Moderate |
| South Harwich | Noneas of Jul 15 | None | Moderate |
| Wellfleet | Noneas of Jul 15 | None | Moderate |
| Vineyard Haven | Noneas of Jul 15 | None | Moderate |
| Harwich | Noneas of Jul 15 | None | Moderate |
| Yarmouth Port | Noneas of Jul 15 | None | Moderate |
| Dennis | Noneas of Jul 15 | None | Moderate |
| Hyannis | Noneas of Jul 15 | None | Moderate |
| Brewster | Noneas of Jul 15 | None | Moderate |
| Falmouth | Noneas of Jul 15 | None | Moderate |
| Marstons Mills | Noneas of Jul 15 | None | Moderate |
| Barnstable | Noneas of Jul 15 | None | Moderate |
| South Chatham | Noneas of Jul 15 | None | Moderate |
| Edgartown | Noneas of Jul 15 | None | Moderate |
| Mashpee | Noneas of Jul 15 | None | Moderate |
| Pittsfield | No live reading | Not available | Moderate |
| Marlborough | No live reading | Not available | Moderate |
| West Newbury | No live reading | Not available | Moderate |
| Seekonk | No live reading | Not available | Moderate |
| Whately | No live reading | Not available | Moderate |
| Huntington | No live reading | Not available | Moderate |
| Ayer | No live reading | Not available | Moderate |
| Raynham | No live reading | Not available | Moderate |
| Norfolk | No live reading | Not available | Moderate |
| Shutesbury | No live reading | Not available | Moderate |
| Brookfield | No live reading | Not available | Moderate |
| Great Barrington | No live reading | Not available | Moderate |
| Sutton | No live reading | Not available | Moderate |
| Boxborough | No live reading | Not available | Moderate |
| Acushnet | No live reading | Not available | Moderate |
| Gilbertville | No live reading | Not available | Moderate |
| South Dennis | No live reading | Not available | Moderate |
| Woods Hole | No live reading | Not available | Moderate |
| Hudson | No live reading | Not available | Moderate |
| North Reading | No live reading | Not available | Moderate |
| East Weymouth | No live reading | Not available | Moderate |
| Williamsburg | No live reading | Not available | Moderate |
| Leverett | No live reading | Not available | Moderate |
| Chestnut Hill | No live reading | Not available | Moderate |
| Foxborough | 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 Massachusetts allergy season
Allergy levels in Massachusetts 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 Massachusetts?
Pollen levels in Massachusetts usually begin climbing in March and reach their highest point in September.
What is the worst month for allergies in Massachusetts?
September is typically the worst month in Massachusetts, driven by ragweed pollen.
When does ragweed season end in Massachusetts?
Ragweed pollen in Massachusetts usually fades by the end of October, after the first hard frost in colder areas.
When is the best time for allergies in Massachusetts?
January usually brings the lowest pollen levels of the year in Massachusetts.