Weather history and climate summary information is available for the following locations:
- Cincinnati
- Cleveland
- Columbus
- Dayton
- Wilmington
- Youngstown
Warmest October Days
The warmest October days in Ohio are:
| Columbus, Ohio | 2007 | 93.2°F |
| Cincinnati, Ohio | 2007 | 91.9°F |
| Columbus, Ohio | 2007 | 91°F |
| Dayton, Ohio | 1939 | 90.3°F |
| Dayton, Ohio | 2007 | 90.3°F |
Coldest October Days
The coldest October days in Ohio were:
| Columbus, Ohio | 1952 | 18°F |
| Columbus, Ohio | 1952 | 19°F |
| Cleveland, Ohio | 1988 | 19°F |
| Dayton, Ohio | 1962 | 19.9°F |
| Dayton, Ohio | 1952 | 19.9°F |
Wettest October Days
The wettest single days in October occurred:
| Dayton, Ohio | 1984 | 10 inches |
| Dayton, Ohio | 1989 | 5.6 inches |
| Dayton, Ohio | 1986 | 3.8 inches |
| Cincinnati, Ohio | 2007 | 3.7 inches |
| Wilmington, Ohio | 2007 | 2.8 inches |