ClimateAverages

Missoula Weather in September

JanFebMarAprMayJunJulAugSepOctNovDec
September daytime high
19.1°C
September overnight low
3.4°C
September average
11.1°C

In September, Missoula typically sees daytime highs of 19.1°C and overnight lows around 3.4°C. Compared to the annual average high of 11.0°C, September runs +8.1°C.

vs. annual avg high
+8.1°C
Rank among 12 months
#4 warmest
Hottest year overall
1933

Where September ranks in Missoula

JanFebMarAprMayJunJulAugSep19°OctNovDec

FAQ

What is the average temperature in Missoula in September?

September in Missoula averages a daytime high of 19.1°C and an overnight low of 3.4°C.

Is September warm or cold in Missoula?

September runs +8.1°C compared to Missoula's annual average high of 11.0°C, ranking #4 of 12 months by warmth.

What should I pack for Missoula in September?

Plan for daytime highs near 19.1°C and cooler evenings around 3.4°C.

Other months for Missoula

JanuaryFebruaryMarchAprilMayJuneJulyAugustOctoberNovemberDecember

September in nearby cities

BillingsGreat Falls