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Jacksonville December Weather

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

Typical Jacksonville December Weather 1991–2020
Average daily high	41.2 °F
Average daily low	23.0 °F
Average monthly precipitation	1.9 inches
Average monthly snow	4.3 inches
Daily chance of precipitation	26.3%
Daily chance of snow	10.0%

Jacksonville December Weather Records 1895–2024
Highest temperature	74 °F	December 4, 2012
Lowest temperature	-21 °F	December 26, 1914
Highest daily low	60 °F	December 3, 1982
Lowest daily high	-9 °F	December 25, 1983
Hottest average high temperature	50.5 °F	2021
Coldest average high temperature	24.3 °F	1983
Most daily precipitation	4.8 inches	December 3, 1982
Most monthly precipitation	9.7 inches	1982
Most daily snow	8.5 inches	December 23, 1981
Most monthly snow	23.5 inches	1973

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	46.5	27.1	65	5
December 2	46.1	26.9	68	-2
December 3	45.7	26.5	72	-9
December 4	45.2	26.2	74	2
December 5	44.7	25.8	74	-3
December 6	44.2	25.5	68	-1
December 7	43.8	25.2	72	-4
December 8	43.5	24.8	69	-4
December 9	43.1	24.7	73	-5
December 10	42.8	24.4	65	-12
December 11	42.4	24.1	71	-12
December 12	42.1	23.8	64	-8
December 13	41.8	23.6	70	-7
December 14	41.5	23.3	64	-7
December 15	41.2	23.1	72	-13
December 16	41.0	22.9	71	-15
December 17	40.8	22.7	64	-10
December 18	40.5	22.4	67	-7
December 19	40.2	22.0	60	-18
December 20	39.9	21.8	66	-17
December 21	39.8	21.6	63	-15
December 22	39.6	21.4	64	-19
December 23	39.5	21.2	70	-20
December 24	39.3	21.0	64	-16
December 25	39.1	20.9	67	-13
December 26	38.9	20.7	66	-21
December 27	38.7	20.6	67	-8
December 28	38.5	20.4	65	-17
December 29	38.5	20.3	73	-11
December 30	38.4	20.2	67	-14
December 31	38.1	19.9	66	-8

Weather Station Details

Years	Station	Coordinates
1895–2024	Jacksonville 2E	location