Weather forecast for: Colusa IL
Last Update: 9:46 pm CDT Sep 18, 2026
Overnight: A 10 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 71. Southeast wind around 10 mph.
Saturday: Increasing clouds, with a high near 88. Southwest wind 5 to 10 mph.
Saturday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Some of the storms could produce heavy rainfall. Increasing clouds, with a low around 68. Northeast wind around 5 mph becoming west after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday Night: A chance of showers and thunderstorms, then showers likely after 10pm. Cloudy, with a low around 60. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday: Showers likely, mainly before 1pm. Cloudy, with a high near 66. Chance of precipitation is 60%.
Monday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 55.
Tuesday: Mostly cloudy, with a high near 64.
Tuesday Night: Partly cloudy, with a low around 50.
Wednesday: Mostly sunny, with a high near 67.
Wednesday Night: Partly cloudy, with a low around 54.
Thursday: Partly sunny, with a high near 70.
Thursday Night: Partly cloudy, with a low around 56.
Friday: Mostly sunny, with a high near 71.
WeatherWorld.com
