Weather forecast for: Colchester IL
Last Update: 6:31 pm CDT Sep 27, 2026
Tonight: Mostly cloudy, with a low around 53. Calm wind.
Monday: Sunny, with a high near 73. Calm wind.
Monday Night: Mostly clear, with a low around 54. Calm wind.
Tuesday: Mostly sunny, with a high near 77. Light southeast wind becoming south 5 to 10 mph in the morning.
Tuesday Night: Mostly cloudy, with a low around 65.
Wednesday: Mostly cloudy, with a high near 78.
Wednesday Night: A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 67.
Thursday: Showers. High near 74. Chance of precipitation is 80%.
Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 57.
Friday: Mostly sunny, with a high near 66.
Friday Night: Mostly clear, with a low around 51.
Saturday: Mostly sunny, with a high near 66.
Saturday Night: Partly cloudy, with a low around 54.
Sunday: Mostly sunny, with a high near 67.