Average Temperatures and Rainfall for Montana

Average annual temperatures for Montana (7°C/45°F) are significantly below the average for United States (13°C/55°F).

Average annual rainfall for Montana (509mm/20 inches) is significantly below the average for United States (1,039mm/41 inches).

What is the warmest or hottest month in Montana?

July is the hottest or warmest month in Montana, with an average maximum temperate of 29°C/84°F.

What is the coldest or coolest month in Montana?

February is the coolest or coldest month in Montana, with an average minimum temperate of -11°C/12°F.

What is the most rainy or wettest month in Montana?

May is the wettest or most rainy month in Montana, with an average rainfall of 69mm/3 inches.

What is the least rainy or driest month in Montana?

July is the driest or least rainy month in Montana, with an average rainfall of 25mm/1 inches.

What is the warmest or hottest place in Montana?

Billings is the hottest or warmest place in Montana, with an average maximum temperate of 9°C/48°F.

What is the coldest place in Montana?

Great Falls is the coldest place in Montana, with an average maximum temperate of 7°C/45°F.

What is the most rainy or wettest place in Montana?

Billings is the most rainy or wettest place in Montana, with an average annual rainfall of 445mm/18 inches.

What is the least rainy or driest place in Montana?

Great Falls is the least rainy or driest place in Montana, with an average annual rainfall of 414mm/16 inches.

Average Monthly Temperatures
Average Maximum Temperature Average Minimum Temperature
Average Monthly Rainfall
PlaceMin TempMax TempAvg TempRainfall
Billings 2 16 9 445
Great Falls 0 14 7 414
Missoula 1 14 8 -