Typical September weather
Bozeman
Montana · September
71° days
42° nights
about 4 rainy days · 12½ hours of daylight
What to pack
- Sweater
- Layers
What September feels like
Students are back, the tourist traffic thins, and the aspens in Hyalite and Bridger Canyon turn. The first hard frost usually lands before the month is out, and the Hyalite trailhead lots that were overflowing in July suddenly have parking.
Expect about 4 days with real rain — enough to notice, not enough to plan around.
The numbers
| Typical high | 71° |
|---|---|
| Typical low | 42° |
| Days with real rain | 4 |
| Total rain | 1.4 in |
| Sunrise / sunset (mid-month) | 7:03 am / 7:35 pm |