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Geneseo December Weather

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

Typical Geneseo December Weather 1991–2020
Average daily high	35.7 °F
Average daily low	20.9 °F
Average monthly precipitation	2.1 inches
Average monthly snow	7.2 inches
Daily chance of precipitation	26.5%
Daily chance of snow	10.8%

Geneseo December Weather Records 1895–2024
Highest temperature	70 °F	December 3, 2012
Lowest temperature	-20 °F	December 24, 1983
Highest daily low	58 °F	December 13, 2015
Lowest daily high	-11 °F	December 24, 1983
Hottest average high temperature	44.5 °F	2015
Coldest average high temperature	20.5 °F	1983
Most daily precipitation	2.6 inches	December 2, 1982
Most monthly precipitation	5.0 inches	2008
Most daily snow	14.5 inches	December 15, 1987
Most monthly snow	24.8 inches	2000

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	41.3	25.5	63	7
December 2	40.8	25.2	67	-3
December 3	40.3	24.8	70	-3
December 4	39.8	24.4	70	-3
December 5	39.4	24.0	69	-1
December 6	38.9	23.7	62	-8
December 7	38.5	23.4	59	-10
December 8	38.1	23.2	66	-7
December 9	37.8	22.9	64	-14
December 10	37.3	22.5	60	-11
December 11	36.9	22.2	59	-15
December 12	36.6	21.9	65	-8
December 13	36.3	21.6	63	-16
December 14	36.1	21.4	61	-12
December 15	35.8	21.2	68	-15
December 16	35.6	20.9	58	-10
December 17	35.3	20.6	57	-7
December 18	34.9	20.3	59	-14
December 19	34.6	20.0	58	-18
December 20	34.4	19.9	59	-13
December 21	34.3	19.7	59	-19
December 22	34.2	19.4	56	-17
December 23	34.0	19.2	61	-19
December 24	33.8	19.0	61	-20
December 25	33.6	18.9	61	-14
December 26	33.6	18.7	54	-14
December 27	33.4	18.5	61	-8
December 28	33.3	18.4	67	-11
December 29	33.2	18.3	63	-6
December 30	32.9	18.0	61	-10
December 31	32.7	17.8	60	-14

Weather Station Details

Years	Station	Coordinates
1895–2024	Geneseo	location