Wyoming climate by month
January highs across Wyoming range from 26°F in Jackson to 40°F in Cheyenne; July highs from 79°F in Jackson to 89°F in Casper. The most common best months across these cities are May, June, September.
Wyoming weather month by month
Average of the 4 Wyoming cities on this site, computed from NOAA's unrounded values (so it can differ by a degree from averaging the rounded city figures); individual cities differ, sometimes a lot.
| Month | High | Low | Wet days | Snow |
|---|---|---|---|---|
| January | 34°F | 14°F | 8 | 10.7 in |
| February | 37°F | 15°F | 8 | 11.1 in |
| March | 47°F | 23°F | 8 | 9.4 in |
| April | 54°F | 29°F | 10 | 8.9 in |
| May | 64°F | 37°F | 12 | 2.0 in |
| June | 76°F | 46°F | 10 | 0.05 in |
| July | 85°F | 52°F | 8 | 0.0 in |
| August | 83°F | 50°F | 8 | 0.0 in |
| September | 73°F | 42°F | 7 | 0.8 in |
| October | 58°F | 31°F | 8 | 4.8 in |
| November | 44°F | 22°F | 7 | 8.3 in |
| December | 34°F | 14°F | 8 | 11.2 in |
Regional differences
Warmest and coolest Wyoming city each month
| Month | Warmest | Coolest | Best month for |
|---|---|---|---|
| January | Cheyenne 40°F | Jackson 26°F | – |
| February | Cheyenne 41°F | Jackson 30°F | – |
| March | Cheyenne 49°F | Jackson 40°F | – |
| April | Gillette 56°F | Jackson 50°F | – |
| May | Casper 67°F | Jackson 60°F | 3 cities |
| June | Casper 80°F | Jackson 70°F | 3 cities |
| July | Casper 89°F | Jackson 79°F | – |
| August | Casper 87°F | Jackson 78°F | – |
| September | Casper 76°F | Jackson 68°F | 1 city |
| October | Casper 60°F | Jackson 55°F | – |
| November | Cheyenne 48°F | Jackson 38°F | – |
| December | Cheyenne 39°F | Jackson 26°F | – |
By normal daily high. "Best month for": how many of the 4 cities have it among their best months by our comfort score.