Weather in December in Casper, Wy

< December >
	Normal Max/ High Temperature	1°C (34°F)
	Average Temperature	-5°C (24°F)
	Min/ Low Temperature	-10°C (14°F)
	Normal Precipitation	17mm (0.7in)
	Average Daylight per day	09h 03'
	Sun altitude at solar noon on the 21st day.	23.7°

The average temperature in Casper, Wy in December is slightly cold at -4.6 °C (23.72 °F).
Afternoons can be very cool with average high temperatures reaching 1.1 °C (34 °F).
Overnight temperatures are generally very cold with an average low of -10.2 °C (13.6 °F).
In December the mean daily temperature variation/ range is 11.3 °C (20.3 °F).
Precipitation averages for December are low with 16.8mm (0.7 in) recorded.
The shortest day is 9h 00' long and the longest day is 9h 13' long with an average length of 9h 03'.

Weather Trend Graph for December in Casper, Wy, Usa

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