Rainy days · Wyoming
How often does it rain in Casper?
Casper’s rain is so brief the wind barely notices it was there.
Casper gets measurable rain or snow on about 91 days a year, adding up to about 12 inches.
November usually brings Casper about 6 wet days and 0.6 inches. The wettest month is usually May, with about 11 wet days, and the driest is August, with about 6 wet days. That makes Casper number 102 of the 129 US cities we track, rainiest first.
Last updated
No rain in the forecast for the next 48 hours.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 6 | 0.5 |
| February | 7 | 0.6 |
| March | 8 | 0.8 |
| April | 10 | 1.4 |
| May | 11 | 2.2 |
| June | 9 | 1.3 |
| July | 7 | 1.2 |
| August | 6 | 0.8 |
| September | 7 | 0.9 |
| October | 8 | 1.2 |
| November | 6 | 0.6 |
| December | 7 | 0.6 |
Cities with about as many rainy days
- Salt Lake City, Utah: about 91 wet days a year
- Helena, Montana: about 92 wet days a year
- Boise, Idaho: about 89 wet days a year
Source: NOAA daily precipitation records for the Casper area, 1991 to 2020 (at least 30 complete years behind every month), via the Applied Climate Information System. A wet day here means at least a hundredth of an inch of rain or melted snow.