| < 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 Storm Lake, Ia in September is very mild at 15.7 °C (60.26 °F).
- Afternoons can be really warm with average high temperatures reaching 22.7 °C (72.9 °F).
- Overnight temperatures are generally a little cool with an average low of 8.7 °C (47.7 °F).
- The mean diurnal temperature range/ variation in September is 14 °C (25.2 °F).
- The weather in September is hardly arid. Circa 95.8mm (3.8in) of liquid falls.
- The shortest day is 11:43 long and the longest day is 13:09 long with an average length of 12:26.
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Weather Trend Graph for September in Storm Lake, Ia, Usa
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