As of 09:15 CDT

Jerseyville, IL weather in December

80°

Jerseyville, Sunday, 9 August, 09:15

Overcast. Feels like 86°. High 95°, low 72°.

Pressure30.03 inHg

Wind10.4 mph S

Humidity85%

Visibility6.2 mi

Dew point75°

See detailed hourly forecast

In December, Jerseyville, IL averages a high of 41.4° and a low of 27.6°. About 2.8 inches of precipitation fall over the month (9 wet days). The record high is 73.4° (2025) and the record low -20.6° (1989). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	45°	31.6°	28%	66.4° (1970)	11.8° (1985)
2	46°	31.6°	25%	69.3° (1982)	6.4° (2006)
3	45.1°	32°	28%	70.5° (2012)	9.7° (1985)
4	44.1°	30.7°	28%	68.9° (1998)	2.7° (2006)
5	44.8°	29.8°	28%	69.6° (1998)	3.7° (2025)
6	42.3°	29.5°	38%	69.1° (1998)	2.1° (1964)
7	41.4°	28.9°	20%	65.5° (1980)	-1.7° (1977)
8	41.9°	29.1°	30%	68.5° (1991)	-0.6° (2006)
9	42.3°	28.6°	30%	60.4° (2021)	0.7° (1977)
10	42.1°	27.3°	25%	63.5° (2021)	-4.7° (1977)
11	42.1°	27.3°	28%	63.9° (2021)	-0.4° (1977)
12	42.1°	29.3°	23%	68.4° (2015)	0.9° (1962)
13	42.3°	28.8°	33%	63.9° (2015)	-2.7° (1961)
14	42.6°	29.1°	35%	64.9° (1975)	1.8° (1985)
15	43°	28.8°	37%	68.9° (2021)	-6.2° (1989)
16	40.6°	27.5°	27%	66.9° (2021)	-8.9° (1989)
17	39.4°	25.7°	22%	58.8° (1984)	-10.7° (1972)
18	39.9°	25.3°	28%	57.9° (2002)	-2° (1983)
19	39.9°	25.7°	27%	59.9° (1976)	-11° (1981)
20	40.5°	26.1°	25%	61.9° (1988)	-9.2° (1981)
21	39.7°	25.9°	32%	62.4° (1967)	-14.1° (1989)
22	40.3°	26.1°	25%	57.6° (1988)	-19.7° (1989)
23	40.5°	26.6°	27%	63.3° (2025)	-20.6° (1989)
24	37.6°	24.4°	28%	67.5° (2021)	-17.3° (1983)
25	37.8°	23.9°	22%	63.5° (2021)	-17.9° (1983)
26	39.4°	25.3°	20%	64.8° (2019)	-5.6° (1983)
27	40.6°	26.8°	28%	63.5° (1971)	0.1° (2017)
28	41.7°	27°	33%	73.4° (2025)	2.5° (2000)
29	39.4°	26.4°	33%	67.5° (1984)	-6.3° (1983)
30	39.7°	25.7°	35%	63.1° (1965)	-15.2° (1983)
31	38.3°	25.2°	30%	63.1° (2021)	-2.6° (1990)