Weather history and climate summary information is available for the following locations:
- Casper
- Cheyenne
- Sheridan
Warmest October Days
The warmest October days in Wyoming are:
| Sheridan, Wyoming | 2011 | 93°F |
| Sheridan, Wyoming | 1992 | 90°F |
| Sheridan, Wyoming | 2003 | 89.1°F |
| Sheridan, Wyoming | 2010 | 89.1°F |
| Sheridan, Wyoming | 1993 | 87.1°F |
Coldest October Days
The coldest October days in Wyoming were:
| Sheridan, Wyoming | 1991 | -8°F |
| Cheyenne, Wyoming | 1991 | 0°F |
| Cheyenne, Wyoming | 1993 | 1°F |
| Casper, Wyoming | 1991 | 1.9°F |
| Sheridan, Wyoming | 2006 | 1.9°F |
Wettest October Days
The wettest single days in October occurred:
| Casper, Wyoming | 1998 | 2.3 inches |
| Sheridan, Wyoming | 2011 | 2.1 inches |
| Casper, Wyoming | 1962 | 1.9 inches |
| Casper, Wyoming | 1994 | 1.5 inches |
| Sheridan, Wyoming | 2009 | 1.4 inches |