Weather forecast for: Frankfort IL
Last Update: 4:46 pm CDT Sep 16, 2026
Tonight: Showers and thunderstorms, mainly after 1am. Some of the storms could produce heavy rainfall. Low around 68. Northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Thursday: Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 78. Calm wind becoming north northwest around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night: Mostly cloudy, with a low around 64. Northeast wind 5 to 10 mph.
Friday: Partly sunny, with a high near 78. East wind 5 to 10 mph.
Friday Night: Scattered showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday: Showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Saturday Night: Showers and possibly a thunderstorm. Low around 66. Chance of precipitation is 80%.
Sunday: A chance of showers. Cloudy, with a high near 74.
Sunday Night: A chance of showers. Mostly cloudy, with a low around 60.
Monday: A chance of showers. Mostly cloudy, with a high near 70.
Monday Night: A chance of showers. Mostly cloudy, with a low around 58.
Tuesday: A chance of showers. Mostly cloudy, with a high near 70.
Tuesday Night: Mostly cloudy, with a low around 58.
Wednesday: Mostly sunny, with a high near 74.