| < December >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Daylight per day
|Sun altitude at solar noon on the 21st day.
- The average temperature in Walnut, Il in December is slightly cold at -4.1 °C (24.62 °F).
- Afternoons can be very cool with average high temperatures reaching 0.5 °C (32.9 °F).
- Overnight temperatures are generally cold with an average low of -8.7 °C (16.3 °F).
- In December the mean daily temperature variation/ range is 9.2 °C (16.6 °F).
- The weather in December is slightly dry. Only 51.3mm (2in) of H2O descends.
- The shortest day is 9:06 long and the longest day is 9:19 long with an average length of 9:10.
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Weather Trend Graph for December in Walnut, Il, Usa
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