| < 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 Chicago/ 0’Hare, Il in December is slightly cold at -3 °C (26.6 °F).
- Afternoons can be very cool with average high temperatures reaching 1.1 °C (34 °F).
- Overnight temperatures are generally cold with an average low of -7.2 °C (19 °F).
- The variation/ range of diurnal mean temperatures in December is 8.3 °C (14.9 °F).
- The weather in December is marginally dry. Only 62.7mm (2.5in) of water falls.
- 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 Chicago/ 0’Hare, Il, Usa
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