| NWS Forecast for: Flat Rock IL Issued by: National Weather Service Lincoln, IL Last Update: 1:56 pm CDT Sep 10, 2026 |  |
This Afternoon: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy, with a high near 81. North wind around 6 mph. Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 66. Northeast wind 3 to 5 mph. Chance of precipitation is 30%. Friday: Patchy fog before 7am. Otherwise, partly sunny, with a high near 84. Northeast wind around 6 mph becoming east southeast in the afternoon. Friday Night: A chance of showers before midnight, then a chance of showers after 3am. Mostly cloudy, with a low around 68. Light and variable wind. Chance of precipitation is 30%. Saturday: Mostly sunny, with a high near 89. Calm wind becoming west southwest 5 to 7 mph in the morning. Saturday Night: Partly cloudy, with a low around 67. Light south southwest wind. Sunday: Mostly sunny, with a high near 90. Calm wind becoming west southwest around 6 mph in the afternoon. Sunday Night: Partly cloudy, with a low around 64. Monday: Sunny, with a high near 89. Monday Night: Mostly clear, with a low around 67. Tuesday: Sunny, with a high near 93. Tuesday Night: A chance of showers. Mostly clear, with a low around 67. Wednesday: A chance of showers. Mostly sunny, with a high near 90. | |
| Flat Rock IL 38.91°N 87.68°W (Elev. 502 ft) | |
Visit your local NWS office at: https://www.weather.gov/ilx |
