Weather forecast for: Chester IL
Last Update: 11:51 am CDT Sep 11, 2026
This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Cloudy, with a high near 81. Southeast wind 5 to 7 mph.
Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 4am. Patchy fog after 4am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 66. Light and variable wind. Chance of precipitation is 30%.
Saturday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 90. Calm wind becoming west around 5 mph.
Saturday Night: Partly cloudy, with a low around 66. Light and variable wind.
Sunday: Mostly sunny, with a high near 90. Light and variable wind.
Sunday Night: Partly cloudy, with a low around 66.
Monday: Sunny, with a high near 90.
Monday Night: Mostly clear, with a low around 68.
Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92.
Tuesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Wednesday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Wednesday Night: A 30 percent chance of showers. Partly cloudy, with a low around 68.
Thursday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.