Weather history and climate summary information is available for the following locations:
- Evansville
- Fort Wayne
- Indianapolis
- South Bend
Warmest October Days
The warmest October days in Indiana are:
| Evansville, Indiana | 2007 | 93°F |
| Evansville, Indiana | 1989 | 91°F |
| Evansville, Indiana | 2010 | 91°F |
| Indianapolis, Indiana | 2007 | 91°F |
| Fort Wayne, Indiana | 1951 | 90.3°F |
Coldest October Days
The coldest October days in Indiana were:
| Fort Wayne, Indiana | 1988 | 19°F |
| Indianapolis, Indiana | 1976 | 19.9°F |
| Fort Wayne, Indiana | 1952 | 19.9°F |
| Indianapolis, Indiana | 1981 | 19.9°F |
| South Bend, Indiana | 1988 | 19.9°F |
Wettest October Days
The wettest single days in October occurred:
| South Bend, Indiana | 1988 | 3.5 inches |
| Indianapolis, Indiana | 1986 | 3.4 inches |
| Indianapolis, Indiana | 1977 | 3 inches |
| Indianapolis, Indiana | 1991 | 2.9 inches |
| Evansville, Indiana | 2009 | 2.7 inches |