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Charleston December Weather

Averages and records for weather in Charleston, Illinois in the month of December.

Typical Charleston December Weather 1991–2020
Average daily high	41.5 °F
Average daily low	25.9 °F
Average monthly precipitation	2.8 inches
Average monthly snow	4.3 inches
Daily chance of precipitation	33.4%
Daily chance of snow	10.5%

Charleston December Weather Records 1896–2024
Highest temperature	73 °F	December 15, 1948
Lowest temperature	-20 °F	December 22, 1989
Highest daily low	61 °F	December 4, 1998
Lowest daily high	-7 °F	December 22, 1989
Hottest average high temperature	51.3 °F	2015
Coldest average high temperature	27.2 °F	1983
Most daily precipitation	2.9 inches	December 30, 1990
Most monthly precipitation	8.5 inches	2015
Most daily snow	8.3 inches	December 26, 1975
Most monthly snow	17.8 inches	2005

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
December 1	47.1	30.5	70	7
December 2	46.7	30.2	71	-1
December 3	46.2	29.9	72	2
December 4	45.7	29.5	71	4
December 5	45.2	29.1	67	10
December 6	44.8	28.8	71	0
December 7	44.4	28.5	70	-2
December 8	44.1	28.3	66	-1
December 9	43.8	28.1	66	-9
December 10	43.4	27.7	65	-11
December 11	42.9	27.3	66	-16
December 12	42.6	27.0	69	-11
December 13	42.3	26.7	66	-6
December 14	42.0	26.4	67	-10
December 15	41.6	26.1	73	-12
December 16	41.4	26.0	67	-14
December 17	41.2	25.9	64	-9
December 18	41.0	25.5	63	-7
December 19	40.8	25.3	59	-12
December 20	40.6	25.1	65	-10
December 21	40.5	24.9	65	-13
December 22	40.3	24.8	63	-20
December 23	40.1	24.6	69	-17
December 24	39.9	24.4	64	-17
December 25	39.7	24.3	64	-14
December 26	39.6	24.1	67	-8
December 27	39.4	23.9	69	-8
December 28	39.4	23.8	69	-20
December 29	39.3	23.7	65	-6
December 30	39.1	23.5	66	-9
December 31	39.0	23.2	66	-7

Weather Station Details

Years	Station	Coordinates
1896–2024	Charleston	location