September · United States
Best time to visit Bozeman in September Weather, crowds & prices
Weather in Bozeman in September
Average temperature 13°C, 52 mm of rain, about 17 days with 6+ hours of sunshine and 55% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.9/10
Ranked #4 of 12 months
- Avg temp
- 13°C
- Rainfall
- 52 mm
- Humidity
- 55%
- Days with 6h+ sun
- 17
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Bozeman scores 8.9/10 for nature and wildlife travel - an above-average month (#4 of 12). Expect around 13°C, 52 mm of rain, and roughly 17 days with 6+ hours of sunshine this month.
Bozeman sits between the Bridger range and Yellowstone, with skiing, fly-fishing and a university town core.
September is one of the strongest months in Bozeman (4th)
September averages 13°C (56°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 52 mm, so plan one flexible day in three; you still get about 17 days with 6+ hours of sunshine and 12.3 hours of daylight.
A 8.9/10 puts this among the year's best months in Bozeman (4th of 12); only July scores higher, at 10/10.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer, footwear you can get muddy.
Plan for mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Bozeman in September?
- In September, Bozeman averages 13°C, 52 mm of rain, and about 17 days with 6+ hours of sunshine. Its climate-comfort score is 8.9/10.
- Is September a good time to visit Bozeman?
- September earns a 8.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Bozeman in September?
- Expect about 52 mm of rain in September. Average humidity is 55% and there are about 17 days with 6+ hours of sunshine.
Curated in Bozeman
Tickets & experiences
Things to do in Bozeman
Bozeman, United States. Live activities and tours from GetYourGuide, matched to this destination.