Montana Weather in September

During September, Montana experiences high daytime temperatures of 24°C (75°F) and cooler nights around 13°C (55°F). Expect quite a bit of rainfall. Around 64 mm (2.5 in) is typical.

Rainfall in Montana in September

Expect around 5 days of rain based on historical data, with 64 mm (2.5 in) average. The rain this month typically falls in concentrated bursts rather than all-day showers. Expect a few heavier spells rather than constant grey skies.

Temperature in Montana in September

September is one of the better months to visit Montana. Expect 24°C (75°F) during the day and 13°C (55°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

So this is a great month to visit if you prefer dry days with pleasant temperatures.