Wyoming weather in August
The state broadly agrees with itself in August: afternoons run 80° in Yellowstone and 78° in Jackson Hole, with everywhere else in between.
Based on 2 weather stations. Two stations, both in the mountainous northwest corner where visitors go — the high plains that make up most of Wyoming aren’t measured here.
Jackson Hole & the Tetons
Highs near 78°, nights around 40°, and 1.1 in of rain in a typical August.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Jackson Hole | 78° / 40° | 4 | High summer, and the tent still frosts some mornings. |
Yellowstone Country
Highs near 80°, nights around 47°, and 1.1 in of rain in a typical August.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Yellowstone | 80° / 47° | 3 | Summer's last full month, warm days, cold clear nights. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.