Summer temperatures · Wyoming
How hot does Casper get in summer?
In a typical summer, June to August, Casper averages highs around 85°F and lows around 50°F.
About 38 days a year reach 90°F or hotter, and about one reaches 100°F. About 92 days a year get to 80°F or warmer. That makes it the 15th coolest summer of the 129 US cities we track.
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The hottest high in the forecast for the next 48 hours is about 55°F.
Casper averages summer highs around 85°F and lows around 50°F, so the same day can feel like July at lunch and October by midnight.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 85°F |
|---|---|
| Average summer low | 50°F |
| Days a year at 80°F or warmer | 92 |
| Days a year at 90°F or hotter | 38 |
| Days a year at 100°F or hotter | 1 |
| Average winter high, for comparison | 36°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Spokane, Washington: highs around 81°F, lows around 55°F
- Cheyenne, Wyoming: highs around 81°F, lows around 53°F
- Portland, Maine: highs around 77°F, lows around 59°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00024089.