Montana pollen and allergy seasons
Montana has a spring tree season, grass in early summer, and a sagebrush led weed season in late summer.
Twelve month pollen calendar
What is active in August
Cities in Montana
| City | Today | Worst today | Typical in August |
|---|---|---|---|
| Billings | Very Highas of Aug 8 | Grass | High |
| Missoula | Very Highas of Aug 8 | Grass | High |
| Great Falls | Very Highas of Aug 8 | Grass | High |
| Bozeman | Very Highas of Aug 8 | Grass | High |
| Butte | Very Highas of Aug 8 | Grass | High |
| Helena | Very Highas of Aug 8 | Grass | High |
| Kalispell | Very Highas of Aug 8 | Grass | High |
| Belgrade | Very Highas of Aug 8 | Grass | High |
| Lewistown | Very Highas of Aug 8 | Grass | High |
| Saint Ignatius | Very Highas of Aug 8 | Grass | High |
| Seeley Lake | Very Highas of Aug 8 | Grass | High |
| Whitefish | Very Highas of Aug 8 | Grass | High |
| West Yellowstone | Very Highas of Aug 8 | Grass | High |
| Cascade | Very Highas of Aug 8 | Grass | High |
| Deer Lodge | Very Highas of Aug 8 | Grass | High |
| Hamilton | Very Highas of Aug 8 | Grass | High |
| Lakeside | Very Highas of Aug 8 | Grass | High |
| Columbia Falls | Very Highas of Aug 8 | Grass | High |
| Clancy | Very Highas of Aug 8 | Grass | High |
| Babb | Very Highas of Aug 8 | Grass | High |
| Livingston | Very Highas of Aug 8 | Grass | High |
| Corvallis | Very Highas of Aug 8 | Grass | High |
| Ronan | Very Highas of Aug 8 | Grass | High |
| Alberton | Highas of Aug 8 | Grass | High |
| Wolf Creek | Highas of Aug 8 | Grass | High |
| Eureka | Highas of Aug 8 | Grass | High |
| Roundup | Highas of Aug 8 | Grass | High |
| Ennis | Moderateas of Aug 8 | Grass | High |
| Stevensville | Moderateas of Aug 8 | Grass | High |
| Circle | Noneas of Aug 8 | None | High |
| Drummond | No live reading | Not available | High |
| Grass Range | No live reading | Not available | High |
| Florence | No live reading | Not available | High |
| Havre | No live reading | Not available | High |
| West Glacier | No live reading | Not available | High |
| Pleasant Prairie | No live reading | Not available | High |
Today and worst today come from live readings where available. Typical shows the usual level for this month from the seasonal profile.
Pollen is only half of what's in the air. See today's air quality in Montana for ozone, dust, and smoke readings by city.
The Montana allergy season
Allergy levels in Montana peak in June, when grass pollen runs highest. The season moves through tree pollen around March, grass in June, weed pollen such as ragweed in August. Levels start to climb around March. The lowest pollen levels of the year arrive in January.
Common questions
When does allergy season start in Montana?
Pollen levels in Montana usually begin climbing in March and reach their highest point in June.
What is the worst month for allergies in Montana?
June is typically the worst month in Montana, driven by grass pollen.
When does ragweed season end in Montana?
Ragweed pollen in Montana usually fades by the end of September, after the first hard frost in colder areas.
When is the best time for allergies in Montana?
January usually brings the lowest pollen levels of the year in Montana.