Weather history and climate summary information is available for the following locations:
- Casper
- Cheyenne
- Sheridan
Warmest April Days
The warmest April days in Wyoming are:
| Sheridan, Wyoming | 1989 | 86°F |
| Sheridan, Wyoming | 2012 | 84.9°F |
| Sheridan, Wyoming | 1980 | 84.9°F |
| Sheridan, Wyoming | 1992 | 84°F |
| Casper, Wyoming | 1992 | 84°F |
Coldest April Days
The coldest April days in Wyoming were:
| Cheyenne, Wyoming | 1975 | -7.1°F |
| Casper, Wyoming | 1997 | -6°F |
| Cheyenne, Wyoming | 1959 | -2°F |
| Sheridan, Wyoming | 1975 | -2°F |
| Casper, Wyoming | 1975 | -0.9°F |
Wettest April Days
The wettest single days in April occurred:
| Sheridan, Wyoming | 1973 | 5.9 inches |
| Casper, Wyoming | 1974 | 2.7 inches |
| Casper, Wyoming | 1964 | 1.6 inches |
| Sheridan, Wyoming | 1978 | 1.5 inches |
| Cheyenne, Wyoming | 1988 | 1.5 inches |