Weather forecast for: Monticello IL
Last Update: 9:46 pm CST Mar 2, 2026
Overnight: Rain likely, mainly after 5am. Patchy fog after 4am. Otherwise, cloudy, with a low around 34. East southeast wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday: Rain and thunderstorms before 4pm, then rain and possibly a thunderstorm, mainly after 4pm. High near 48. East wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: Rain and possibly a thunderstorm before 3am, then a chance of rain and thunderstorms between 3am and 4am, then rain likely and possibly a thunderstorm after 4am. Low around 41. East northeast wind 6 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Wednesday: Rain before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. High near 58. East northeast wind 7 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night: Showers and possibly a thunderstorm. Low around 51. South wind 7 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday: Showers, mainly before noon. High near 64. West southwest wind 10 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night: A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 48. West southwest wind 7 to 9 mph becoming south southeast after midnight.
Friday: Showers likely, mainly before noon. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 60%.
Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 57. Chance of precipitation is 80%.
Saturday: Showers likely, mainly before noon. Cloudy, with a high near 67. Chance of precipitation is 70%.
Saturday Night: Mostly cloudy, with a low around 45.
Sunday: Partly sunny, with a high near 61.
Sunday Night: Mostly cloudy, with a low around 46.
Monday: Mostly sunny, with a high near 67.
WeatherWorld.com
