| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Daylight per day
|Sun altitude at solar noon on the 21st day.
- The average temperature in Clinton, Ia in September is somewhat warm at 18.4 °C (65.12 °F).
- Afternoons can be fairly hot with average high temperatures reaching 24.9 °C (76.8 °F).
- Overnight temperatures are generally quite mild with an average low of 11.9 °C (53.4 °F).
- The variation/ range of diurnal average temperatures in September is 13 °C (23.4 °F).
- The weather in September is dryish. Just 87.9mm (3.5in) of liquid is unloaded.
- The shortest day is 11:44 long and the longest day is 13:07 long with an average length of 12:26.
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Weather Trend Graph for September in Clinton, Ia, Usa
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