Weather in Missoula in September
How warm is it in Missoula in September?
In September the typical daytime high in Missoula is 22.6 °C on average, from 26.3 °C at the start to 19.4 °C at the end of the month.
That is 5.7 °C cooler than in August and 7.6 °C warmer than in October.
The last 10 years were 1.3 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
The average of the weather stations Boulder (160 km) and Spokane Intl Ap (279 km); nearer ones count more.