Weather forecast for: Monticello IL
Last Update: 6:36 am CDT Oct 11, 2026
Today: Partly sunny, then gradually becoming sunny, with a high near 82. Light and variable wind.
Tonight: Increasing clouds, with a low around 60. South wind 3 to 8 mph.
Columbus Day: Mostly cloudy, then gradually becoming sunny, with a high near 89. Southwest wind 8 to 16 mph, with gusts as high as 22 mph.
Monday Night: Clear, with a low around 70. Southwest wind 10 to 13 mph, with gusts as high as 18 mph.
Tuesday: Sunny, with a high near 88. West wind 13 to 15 mph, with gusts as high as 20 mph.
Tuesday Night: Showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 64. West northwest wind around 7 mph becoming northeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 78. Northeast wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 58.
Thursday: Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 51.
Friday: Partly sunny, with a high near 66. Breezy.
Friday Night: Partly cloudy, with a low around 39. Breezy.
Saturday: Mostly sunny, with a high near 58.
WeatherWorld.com
