Typical Weather in Helena, MT in December

32° F Avg High

13° F Avg Low

2 Rainy Days

☀️ Temperature Summary

Highs in December are typically around 32°F, which is cooler than usual in Helena. Pack a jacket if you're considering a visit to Helena at this time. You can expect overnight lows near 13°F most days. This is the coldest month of the year in Helena.

You may want to consider a warmer month to visit Helena, 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 43°.

High Temps Throughout the Year

☔ Rain Summary

You can expect about a 5% chance of rain for any given day in December. It's one of the drier months of the year for Helena, with total rainfall for the month around 0 inches.