Monmouth December Weather

Averages and records for weather in Monmouth, Illinois in the month of December.
Typical Monmouth December Weather
1991–2020
Average daily high 37.6 °F
Average daily low 21.3 °F
Average monthly precipitation 2.1 inches
Average monthly snow 5.8 inches
Daily chance of precipitation 21.5%
Daily chance of snow 9.7%
Monmouth December Weather Records
1893–2024
Highest temperature 73 °F December 16, 2021
Lowest temperature -22 °F December 28, 1924
Highest daily low 57 °F December 2, 1982
Lowest daily high -11 °F December 24, 1983
Hottest average high temperature 47.2 °F 2021
Coldest average high temperature 22.6 °F 1983
Most daily precipitation 3.8 inches December 10, 2003
Most monthly precipitation 4.9 inches 2015
Most daily snow 12.0 inches December 15, 1987
Most monthly snow 19.7 inches 2000
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
December 1 43.4 26.1 63 3
December 2 42.9 25.7 68 -2
December 3 42.5 25.3 69 -4
December 4 42.0 24.9 72 -4
December 5 41.4 24.5 72 -2
December 6 40.9 24.2 67 -5
December 7 40.6 23.9 66 -9
December 8 40.2 23.7 68 -10
December 9 39.9 23.4 66 -10
December 10 39.5 23.0 59 -14
December 11 39.1 22.6 66 -10
December 12 38.7 22.3 66 -10
December 13 38.5 22.1 64 -15
December 14 38.3 21.9 61 -15
December 15 38.0 21.6 62 -18
December 16 37.8 21.4 73 -13
December 17 37.4 21.1 59 -8
December 18 37.2 20.8 65 -13
December 19 36.9 20.5 59 -14
December 20 36.6 20.2 62 -16
December 21 36.5 20.0 60 -20
December 22 36.3 19.8 60 -21
December 23 36.1 19.5 64 -21
December 24 35.9 19.3 61 -20
December 25 35.7 19.1 65 -15
December 26 35.6 19.0 63 -18
December 27 35.5 18.8 63 -13
December 28 35.4 18.7 68 -22
December 29 35.3 18.6 67 -18
December 30 35.1 18.3 64 -11
December 31 34.9 18.1 60 -12
Weather Station Details
Years Station Coordinates
1893–2024 Monmouth location