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 July
Cities in Montana
| City | Today | Worst today | Typical in July |
|---|---|---|---|
| Missoula | Very Highas of Jul 15 | Grass | High |
| Saint Ignatius | Very Highas of Jul 15 | Grass | High |
| Havre | Very Highas of Jul 15 | Grass | High |
| West Glacier | Very Highas of Jul 15 | Grass | High |
| Seeley Lake | Very Highas of Jul 15 | Grass | High |
| Ennis | Very Highas of Jul 15 | Grass | High |
| Stevensville | Very Highas of Jul 15 | Grass | High |
| Hamilton | Very Highas of Jul 15 | Grass | High |
| Roundup | Very Highas of Jul 15 | Grass | High |
| Babb | Very Highas of Jul 15 | Grass | High |
| Corvallis | Very Highas of Jul 15 | Grass | High |
| Great Falls | Highas of Jul 15 | Grass | High |
| Helena | Highas of Jul 15 | Grass | High |
| Kalispell | Highas of Jul 15 | Grass | High |
| Lewistown | Highas of Jul 15 | Grass | High |
| Florence | Highas of Jul 15 | Grass | High |
| Deer Lodge | Highas of Jul 15 | Grass | High |
| Eureka | Highas of Jul 15 | Grass | High |
| Columbia Falls | Highas of Jul 15 | Grass | High |
| Billings | Moderateas of Jul 15 | Grass | High |
| Butte | Moderateas of Jul 15 | Grass | High |
| Belgrade | Moderateas of Jul 15 | Grass | High |
| Grass Range | Moderateas of Jul 15 | Grass | High |
| Whitefish | Moderateas of Jul 15 | Grass | High |
| West Yellowstone | Moderateas of Jul 15 | Grass | High |
| Clancy | Moderateas of Jul 15 | Grass | High |
| Livingston | Moderateas of Jul 15 | Grass | High |
| Pleasant Prairie | Noneas of Jul 15 | None | High |
| Bozeman | No live reading | Not available | High |
| Alberton | No live reading | Not available | High |
| Ronan | No live reading | Not available | High |
| Lakeside | No live reading | Not available | High |
| Circle | 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.
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.