| < 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 Decatur, Il in December is slightly cold at -0.9 °C (30.38 °F).
- Afternoons can be cool with average high temperatures reaching 3.8 °C (38.8 °F).
- Overnight temperatures are generally cold with an average low of -5.6 °C (21.9 °F).
- In December the variation/ range of diurnal mean temperatures is 9.4 °C (16.9 °F).
- The weather in December is dryish. Just 80.3mm (3.2in) of fluid precipitates.
- The shortest day is 9:19 long and the longest day is 9:31 long with an average length of 9:23.
Check the distance to and compare the Decatur, Il December averages with somewhere beginning with:
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Weather Trend Graph for December in Decatur, Il, Usa
Navigate to December Weather in Locations Surrounding Decatur, Il:
- Minonk, Il, Usa - 100.6 kms (62.5 miles) N
- Peoria, Il, Usa - 94.1 kms (58.5 miles) NW
- Jacksonville, Il, Usa - 85.2 kms (52.9 miles) W
- Springfield, Il, Usa - 59.2 kms (36.8 miles) WSW
- Pana, Il, Usa - 68.3 kms (42.4 miles) S
- Carlinville, Il, Usa - 110.1 kms (68.4 miles) SW
- Windsor, Il, Usa - 111.2 kms (69.1 miles) S
- Hillsboro, Il, Usa - 111.2 kms (69.1 miles) S
- Pontiac, Il, Usa - 111.2 kms (69.1 miles) N
- Ottawa, Il, Usa - 111.2 kms (69.1 miles) N
- Hoopestonne, Il, Usa - 124.4 kms (77.3 miles) ENE
- Danville, Il, Usa - 85.2 kms (52.9 miles) E
- Urbana, Il, Usa - 85.2 kms (52.9 miles) E
- Paris, Il, Usa - 85.2 kms (52.9 miles) E