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Pollen Level
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Bozeman's allergy season is relatively mild compared to other US regions, running from April through September. However, the dry air and altitude around Bozeman, MT create unique challenges — pollen travels further and dry conditions can irritate airways.
Right now: August brings sagebrush pollen to Bozeman. This is the primary fall allergen in the Mountain West.
Spring
Apr – Jun
Juniper, pine, and cottonwood tree pollen peak at lower elevations.
Summer
Jun – Aug
Grass pollen peaks. Higher elevations see delayed and shorter seasons.
Fall
Aug – Sep
Sagebrush and ragweed in lower elevations. Season ends earlier at altitude.
Dry air near Bozeman can carry pollen over longer distances, but lower humidity means less mold than in humid regions. Elevation significantly affects local pollen timing — even a 30-minute drive changes conditions. PollenTracker accounts for these variations.
Open another nearby forecast without going back to the map.
Weather
70°F
Overcast · 38% humidity · 3 mph wind
Google UPI 0/5
Google UPI 0/5
CAUTION
Ragweed pollen risk is very high; the source reading is Google UPI 5/5 (Very High). Limit outdoor time and take precautions if you go out.
Pollen: Ragweed pollen risk is very-high today; source reading: Google UPI 5/5 (Very High).
Lower-risk hours: 17:00-19:00
Hourly pollen risk is estimated from weather trends when no live hourly pollen feed is available.
Informational only. Not medical advice. For health concerns, please consult a qualified healthcare provider. Editorial standards.