Downtown Bozeman's Main Street with mountains beyond

Weather · September

Bozeman weather in September

Average highs of 71°F, lows of 42°F and 1.4 in of rain, from 30 years of weather records.

September is Bozeman’s 4th warmest month, with average highs of 71°F and lows of 42°F. That is 10° cooler than August, and 15° above the yearly average high.

Average high
71°F
Average low
42°F
Precipitation
1.4 in
Wet days
9
Sunrise · sunset
7:02 AM · 7:36 PM

September across the year

  1. 34°15°Jan
  2. 37°17°Feb
  3. 46°24°Mar
  4. 55°31°Apr
  5. 63°39°May
  6. 72°46°Jun
  7. 82°52°Jul
  8. 81°50°Aug
  9. 71°42°Sep
  10. 57°32°Oct
  11. 42°22°Nov
  12. 33°15°Dec

High and low Rain

What to wear in September

  • Mild days: dress in layers, with a light jacket or sweater for mornings and evenings.

September is good for

What’s on in Bozeman in September

See all upcoming events.

Around Bozeman

Cooper Block (Black Building), Main Street, Bozeman, MT
Cooper Block (Black Building), Main Street, Bozeman, MTw_lemay · CC BY-SA 2.0
Beale Park Community Center, Bozeman, MT 2011
BealeParkCommunityCenterBozemanMT2011Mike Cline · Public domain
Holy Rosary Catholic Church, Main Street and 3rd Avenue, Bozeman, MT
Holy Rosary Catholic Church, Main Street and 3rd Avenue, Bozeman, MT - 53770245941w_lemay · CC BY-SA 2.0

See Bozeman

A look around town before you go.

September compared with the months around it

MonthHighLowRain
August81°F50°F1.3 in
September71°F42°F1.4 in
October57°F32°F1.8 in

Planning a trip? See the best time to visit Bozeman and today’s forecast.

Questions

How hot does it get in Bozeman in September?

Average highs are 71°F and average lows 42°F, for a daily mean of 57°F. Individual days run hotter or colder than these 30-year averages.

Does it rain in Bozeman in September?

September averages 1.4 in of precipitation over about 9 days with at least 0.01 in. It is the 6th wettest month of the year.

What time is sunset in Bozeman in September?

Around mid-September the sun rises about 7:02 AM and sets about 7:36 PM, for roughly 12.6 hours of daylight.

Is September a good time to visit Bozeman?

Yes. September is one of the mildest months, with highs between 65°F and 85°F and little rain.

NOAA U.S. Climate Normals 1991–2020, Bozeman Montana State Univ station (1.3 mi from downtown). Sunrise and sunset are calculated for September 15 at the city’s coordinates.

Bozeman AI

Your Bozeman local guide
Hey there!

I'm Bozeman AI. Ask about neighborhood food, independent shops, local history or planning a visit.

AI recommendations may be inaccurate. Verify hours and prices. Questions are processed by Cloudflare. Privacy