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Weather in December in Mt Vernon, Il

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< December >
 
Normal Max/ High Temperature 6°C (42°F)
 
Average Temperature 0°C (33°F)
 
Min/ Low Temperature -5°C (24°F)
 
Normal Precipitation 91mm (3.6in)
Average Daylight per day 09:34
Sun altitude at solar noon on the 21st day.
28.6°


  • The average temperature in Mt Vernon, Il in December is very cool at 0.4 °C (32.72 °F).
  • Afternoons can be cool with average high temperatures reaching 5.6 °C (42.1 °F).
  • Overnight temperatures are generally slightly cold with an average low of -4.7 °C (23.5 °F).
  • The average diurnal temperature range/ variation in December is 10.3 °C (18.5 °F).
  • The weather in December is hardly arid. Circa 90.9mm (3.6in) of water is deposited.
  • The shortest day is 9:31 long and the longest day is 9:42 long with an average length of 9:34.

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Weather Trend Graph for December in Mt Vernon, Il, Usa

Graph of weather in Mt Vernon, Il in December

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