25. Las Vegas, Nevada
> Average temperature, September 2021: 86.3°F (5.2°F above average)
> Average September temperature, 1901-2000: 81.1°F
> Hottest September on record: 2018 (87.7°F)
> Coldest September on record: 1965 (75.5°F)
24. Rapid City, South Dakota
> Average temperature, September 2021: 65.2°F (5.3°F above average)
> Average September temperature, 1901-2000: 59.9°F
> Hottest September on record: 1998 (67.2°F)
> Coldest September on record: 1965 (48.3°F)
23. Des Moines, Iowa
> Average temperature, September 2021: 70.4°F (5.3°F above average)
> Average September temperature, 1901-2000: 65.1°F
> Hottest September on record: 2019 (71.6°F)
> Coldest September on record: 1993 (59.4°F)
22. Milwaukee, Wisconsin
> Average temperature, September 2021: 68.3°F (5.3°F above average)
> Average September temperature, 1901-2000: 63.0°F
> Hottest September on record: 2005 (69.9°F)
> Coldest September on record: 1943 (58.4°F)
21. Topeka, Kansas
> Average temperature, September 2021: 73.3°F (5.3°F above average)
> Average September temperature, 1901-2000: 68.0°F
> Hottest September on record: 2019 (76.2°F)
> Coldest September on record: 1974 (61.5°F)
