Weather history and climate summary information is available for the following locations:
- Blytheville
- Fort Smith
- Little Rock
- Texarkana
Warmest September Days
The warmest September days in Arkansas are:
| Fort Smith, Arkansas | 2000 | 109°F |
| Texarkana, Arkansas | 2000 | 108°F |
| Fort Smith, Arkansas | 1998 | 108°F |
| Fort Smith, Arkansas | 1947 | 105.3°F |
| Texarkana, Arkansas | 2012 | 105.1°F |
Coldest September Days
The coldest September days in Arkansas were:
| Fort Smith, Arkansas | 1967 | 34°F |
| Fort Smith, Arkansas | 1989 | 36°F |
| Fort Smith, Arkansas | 1984 | 37°F |
| Blytheville, Arkansas | 1967 | 37.9°F |
| Fort Smith, Arkansas | 1982 | 37.9°F |
Wettest September Days
The wettest single days in September occurred:
| Fort Smith, Arkansas | 2007 | 4 inches |
| Texarkana, Arkansas | 2005 | 3.9 inches |
| Little Rock, Arkansas | 2009 | 3.7 inches |
| Texarkana, Arkansas | 2009 | 3.7 inches |
| Fort Smith, Arkansas | 2008 | 3.7 inches |