| 50° | - September 01
- Average high: 39°
- Average low: 27°
- Record high: 48° (1950)
- Record low: 15° (1942)
- Average precip: 0.05 cm
| - September 02
- Average high: 39°
- Average low: 27°
- Record high: 46° (1948)
- Record low: 14° (1944)
- Average precip: 0.05 cm
| - September 03
- Average high: 39°
- Average low: 26°
- Record high: 46° (1948)
- Record low: 15° (1941)
- Average precip: 0.05 cm
| - September 04
- Average high: 39°
- Average low: 26°
- Record high: 45° (1947)
- Record low: 15° (1936)
- Average precip: 0.05 cm
| - September 05
- Average high: 39°
- Average low: 26°
- Record high: 46° (1947)
- Record low: 15° (1941)
- Average precip: 0.05 cm
| - September 06
- Average high: 39°
- Average low: 26°
- Record high: 44° (1986)
- Record low: 14° (1926)
- Average precip: 0.05 cm
| - September 07
- Average high: 38°
- Average low: 26°
- Record high: 44° (1979)
- Record low: 15° (1921)
- Average precip: 0.05 cm
| - September 08
- Average high: 38°
- Average low: 26°
- Record high: 43° (1979)
- Record low: 14° (1920)
- Average precip: 0.05 cm
| - September 09
- Average high: 38°
- Average low: 26°
- Record high: 43° (1990)
- Record low: 12° (1920)
- Average precip: 0.05 cm
| - September 10
- Average high: 38°
- Average low: 26°
- Record high: 44° (1990)
- Record low: 12° (1920)
- Average precip: 0.05 cm
| - September 11
- Average high: 38°
- Average low: 25°
- Record high: 44° (1990)
- Record low: 12° (1920)
- Average precip: 0.05 cm
| - September 12
- Average high: 38°
- Average low: 25°
- Record high: 43° (2001)
- Record low: 13° (1942)
- Average precip: 0.05 cm
| - September 13
- Average high: 38°
- Average low: 25°
- Record high: 43° (1946)
- Record low: 13° (1952)
- Average precip: 0.05 cm
| - September 14
- Average high: 38°
- Average low: 25°
- Record high: 44° (2000)
- Record low: 10° (1964)
- Average precip: 0.05 cm
| - September 15
- Average high: 38°
- Average low: 24°
- Record high: 43° (2000)
- Record low: 11° (1915)
- Average precip: 0.05 cm
| - September 16
- Average high: 37°
- Average low: 24°
- Record high: 43° (1922)
- Record low: 12° (1930)
- Average precip: 0.05 cm
| - September 17
- Average high: 37°
- Average low: 24°
- Record high: 43° (1962)
- Record low: 13° (1930)
- Average precip: 0.05 cm
| - September 18
- Average high: 37°
- Average low: 24°
- Record high: 42° (1922)
- Record low: 14° (1930)
- Average precip: 0.05 cm
| - September 19
- Average high: 37°
- Average low: 24°
- Record high: 42° (1962)
- Record low: 12° (1965)
- Average precip: 0.05 cm
| - September 20
- Average high: 37°
- Average low: 24°
- Record high: 41° (1922)
- Record low: 8° (1965)
- Average precip: 0.05 cm
| - September 21
- Average high: 37°
- Average low: 23°
- Record high: 42° (2003)
- Record low: 8° (1965)
- Average precip: 0.05 cm
| - September 22
- Average high: 37°
- Average low: 23°
- Record high: 43° (1989)
- Record low: 10° (1965)
- Average precip: 0.05 cm
| - September 23
- Average high: 36°
- Average low: 23°
- Record high: 42° (2002)
- Record low: 8° (1941)
- Average precip: 0.05 cm
| - September 24
- Average high: 36°
- Average low: 23°
- Record high: 42° (2002)
- Record low: 8° (1941)
- Average precip: 0.05 cm
| - September 25
- Average high: 36°
- Average low: 23°
- Record high: 42° (1989)
- Record low: 10° (1941)
- Average precip: 0.05 cm
| - September 26
- Average high: 36°
- Average low: 22°
- Record high: 42° (1989)
- Record low: 8° (1934)
- Average precip: 0.05 cm
| - September 27
- Average high: 36°
- Average low: 22°
- Record high: 42° (2009)
- Record low: 8° (1934)
- Average precip: 0.03 cm
| - September 28
- Average high: 36°
- Average low: 22°
- Record high: 42° (1992)
- Record low: 7° (1934)
- Average precip: 0.03 cm
| - September 29
- Average high: 35°
- Average low: 22°
- Record high: 42° (2003)
- Record low: 7° (1934)
- Average precip: 0.03 cm
| - September 30
- Average high: 35°
- Average low: 22°
- Record high: 42° (2003)
- Record low: 9° (1965)
- Average precip: 0.03 cm
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