‹ Yellowstone weather by month
Typical August weather
Yellowstone
Wyoming · August
80° days
47° nights
about 3 rainy days · 14 hours of daylight
What to pack
- Sweater
- Sunscreen
- Layers
What August feels like
August is the driest of the summer months and the best window for the high trails, once the passes have finally shed their snow. Fire is the wildcard — the park has its own closures some years, and haze from elsewhere in the northern Rockies can flatten the long views across Hayden Valley.
Expect about 3 days with real rain — enough to notice, not enough to plan around.
The numbers
| Typical high | 80° |
|---|---|
| Typical low | 47° |
| Days with real rain | 3 |
| Total rain | 1.1 in |
| Sunrise / sunset (mid-month) | 6:25 am / 8:29 pm |