Jerseyville, in Illinois, United States, is home to roughly 8,500 people in the Central Time Zone at 39.1°N latitude.
Recent weather here gives a sense of typical conditions: in 2025, Jerseyville recorded a mean annual temperature of 55°F, ranging from -5°F lows in January to 93°F highs in July, with about 35 inches of precipitation across the year.
View historical weather for Jerseyville · More cities in Illinois