Weather forecast for: Olney IL
Last Update: 11:56 pm CST Mar 3, 2026
Overnight: Showers and thunderstorms likely, mainly before 4am, then showers likely and possibly a thunderstorm after 5am. Patchy fog. Otherwise, cloudy, with a low around 46. East northeast wind 5 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday: Showers likely and possibly a thunderstorm before 9am, then a chance of showers and thunderstorms between 9am and 2pm, then showers and possibly a thunderstorm after 2pm. Patchy fog before noon. High near 64. East southeast wind 5 to 7 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night: Showers and possibly a thunderstorm. Low around 57. Light south southeast wind becoming south southwest 5 to 9 mph in the evening. Winds could gust as high as 17 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday: Showers. High near 66. West southwest wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night: A chance of rain before 9pm, then showers likely, mainly after midnight. Mostly cloudy, with a low around 57. South wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday: A chance of showers and thunderstorms before 9am, then a chance of showers between 9am and noon. Partly sunny, with a high near 77. South southwest wind 8 to 17 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Friday Night: Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday: Showers, mainly before noon. High near 68. Chance of precipitation is 80%.
Saturday Night: Partly cloudy, with a low around 44.
Sunday: Mostly sunny, with a high near 64.
Sunday Night: Partly cloudy, with a low around 48.
Monday: Sunny, with a high near 71.
Monday Night: A chance of showers. Mostly clear, with a low around 57.
Tuesday: A chance of showers. Mostly cloudy, with a high near 74.
WeatherWorld.com
