Average Temperatures and Rainfall for Wyoming

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

Average annual rainfall for Wyoming (337mm/13 inches) is significantly below the average for United States (1,039mm/41 inches).

What is the warmest or hottest month in Wyoming?

July is the hottest or warmest month in Wyoming, with an average maximum temperate of 30°C/86°F.

What is the coldest or coolest month in Wyoming?

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

What is the most rainy or wettest month in Wyoming?

May is the wettest or most rainy month in Wyoming, with an average rainfall of 55mm/2 inches.

What is the least rainy or driest month in Wyoming?

January is the driest or least rainy month in Wyoming, with an average rainfall of 20mm/1 inches.

What is the warmest or hottest place in Wyoming?

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

What is the coldest place in Wyoming?

Cheyenne is the coldest place in Wyoming, with an average maximum temperate of 8°C/46°F.

What is the most rainy or wettest place in Wyoming?

Cheyenne is the most rainy or wettest place in Wyoming, with an average annual rainfall of 433mm/17 inches.

What is the least rainy or driest place in Wyoming?

Casper is the least rainy or driest place in Wyoming, with an average annual rainfall of 354mm/14 inches.

Average Monthly Temperatures
Average Maximum Temperature Average Minimum Temperature
Average Monthly Rainfall
PlaceMin TempMax TempAvg TempRainfall
Casper 0 16 8 354
Cheyenne 1 16 8 433
Gillette 3 15 9 -