Temperature
Pleasant by day, cold at night.
73°Ftypical September high
Typical range
September climate
September in Bozeman
United States · North America
Mild days with cool nights and plenty of sun.
One of the best months here
Daytime high
73°F
Lows around 44°F
Rain
Several rainy days
Sun
11 h/day
Air feel
Very dry
When to visit
Month-by-month fit
Best
Precipitation
Several rainy days. About 8 wet days, the lowest monthly average.
27%wet-day frequency
AmountWet-day chance
Sunshine
Plenty of sun this month.
11.1 hSeptember sunshine
Heat & humidity by month
Very drySeptember Heat feel
Easy airWarm airHot airHumid air
Hourly temperature pattern
In September, afternoons feel about 63° and nights feel near 41°.
FrigidFreezingVery coldColdCoolComfortableWarmNight hours
Clear sky
Partly cloudy skies this month.
59%September Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in September.
4 mphSeptember Calm
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 69°F, easing to about 64°F in early evening.
Avg temp Typical range
Morning55°F
Rain12%
Cloud40%
Humid airLow
Sun intensityLow
Best windowMidday65°F
Rain15%
Cloud43%
Humid airLow
Sun intensityStrong
Late afternoon69°F
Rain14%
Cloud47%
Humid airLow
Sun intensityModerate
Early evening63°F
Rain13%
Cloud43%
Humid airLow
Sun intensityMinimal
Data tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 32 | 16 | 1.2 | 9 | 7.2 | 75 |
| Feb | 34 | 17 | 1.5 | 10 | 8.4 | 74 |
| Mar | 43 | 24 | 1.8 | 11 | 10.1 | 72 |
| Apr | 51 | 29 | 3.0 | 13 | 11.1 | 70 |
| May | 62 | 38 | 4.1 | 16 | 12.3 | 70 |
| Jun | 72 | 46 | 4.0 | 14 | 13.4 | 68 |
| Jul | 84 | 52 | 1.6 | 9 | 14.4 | 58 |
| Aug | 82 | 51 | 1.6 | 8 | 12.8 | 55 |
| Sep | 73 | 44 | 2.1 | 8 | 11.1 | 59 |
| Oct | 56 | 34 | 2.3 | 10 | 9.0 | 68 |
| Nov | 41 | 23 | 1.5 | 9 | 7.6 | 72 |
| Dec | 31 | 15 | 1.4 | 9 | 6.6 | 76 |
Similar climates
Similar
Similar travel styleBendUnited StatesSimilar travel styleLa PazBoliviaSimilar travel styleTorontoCanadaSimilar travel styleNew York CityUnited States
Want a side-by-side climate view? Compare Bozeman with Bend.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology