Weather forecast for: Frankfort IL
Last Update: 9:11 pm CDT Sep 14, 2026
Tonight: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.
Tuesday: Showers and thunderstorms likely, mainly before 10am, then showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 83. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 67. Northwest wind around 5 mph becoming northeast after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 74. Northeast wind around 5 mph. Chance of precipitation is 60%.
Wednesday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Northeast wind around 5 mph becoming calm after midnight.
Thursday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Thursday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 66.
Friday: Partly sunny, with a high near 82.
Friday Night: A chance of showers after 1am. Partly cloudy, with a low around 68.
Saturday: A chance of showers. Mostly sunny, with a high near 84.
Saturday Night: A chance of showers. Partly cloudy, with a low around 66.
Sunday: A chance of showers. Partly sunny, with a high near 79.
Sunday Night: A chance of showers. Mostly cloudy, with a low around 62.
Monday: A chance of showers. Partly sunny, with a high near 76.