Jerseyville city, Illinois

Official LSAD Designation: Jerseyville city • Census GEOID: 1738414 • Jersey County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Jerseyville city.

Reference Weather Station: JERSEYVILLE 2 SW, IL US (ID: USC00114489) • Located 1.3 miles from community center • Elevation: 192.0 m

Month	Average High (°F)	Average Low (°F)	Mean Temp (°F)	Precipitation (in)
January	36.3°	19.2°	27.8°	2.45"
February	41.5°	22.8°	32.2°	2.31"
March	52.5°	31.8°	42.2°	3.17"
April	64.8°	42.1°	53.4°	4.55"
May	74.3°	53.8°	64.1°	5.29"
June	82.9°	62.8°	72.8°	4.12"
July	86.5°	66.0°	76.2°	3.56"
August	85.2°	63.3°	74.2°	3.72"
September	79.2°	54.7°	66.9°	3.44"
October	67.2°	43.3°	55.2°	3.29"
November	52.8°	33.0°	42.9°	3.67"
December	41.2°	24.2°	32.7°	2.65"

2010–2025, completed calendar years only.

NOAA station JERSEYVILLE 2 SW, IL US (ID: USC00114489) • 1.3 miles from community center .

This is the same reference station used for monthly normals.

Show annual mean of daily highs and lows

Annual mean Annual mean of daily highs Annual mean of daily lows

Annual temperature data table (°F)

Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year	Annual mean (°F)	Annual mean of daily highs (°F)	Annual mean of daily lows (°F)
2010	53.5	64.3	42.7
2011	54.2	64.6	43.8
2012	Unavailable	Unavailable	Unavailable
2013	51.8	62.3	41.4
2014	50.3	60.6	40.0
2015	53.7	63.8	43.5
2016	55.7	65.7	45.6
2017	55.3	66.4	44.3
2018	53.6	64.2	43.1
2019	53.1	62.9	43.2
2020	54.0	64.0	44.0
2021	54.5	64.4	44.5
2022	52.9	63.7	42.1
2023	55.3	66.5	44.2
2024	Unavailable	67.4	Unavailable
2025	Unavailable	66.1	Unavailable

Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.