Typical Weather in Great Falls, MT in December

34° F Avg High

18° F Avg Low

3 Rainy Days

☀️ Temperature Summary

Highs in December are typically around 34°F, which is cooler than usual in Great Falls. Pack a jacket if you're considering a visit to Great Falls at this time. You can expect overnight lows near 18°F most days. This is the coldest month of the year in Great Falls.

You may want to consider a warmer month to visit Great Falls, unless you're ready to brave the cold. If you're looking to travel when it's warmer, you might consider visiting in November instead, when daily highs are typically closer to 46°.

High Temps Throughout the Year

☔ Rain Summary

You can expect about a 9% chance of rain for any given day in December. It's one of the drier months of the year for Great Falls, with total rainfall for the month around 1 inches.