Weather forecast for: Crystal Lake IL
Last Update: 9:31 am CDT Sep 16, 2026
Today: Scattered showers, mainly after 4pm. Mostly cloudy, with a high near 70. East northeast wind around 10 mph. Chance of precipitation is 30%.
Tonight: Isolated showers, then scattered showers and thunderstorms after 10pm. Mostly cloudy, with a low around 62. East northeast wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Thursday: A 40 percent chance of showers before 10am. Mostly cloudy, with a high near 75. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night: Mostly cloudy, with a low around 60. Northeast wind around 5 mph becoming calm in the evening.
Friday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 75. East wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 62. Chance of precipitation is 80%.
Saturday: Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 90%.
Saturday Night: Showers likely, mainly before 1am. Cloudy, with a low around 61.
Sunday: A chance of showers. Mostly cloudy, with a high near 71.
Sunday Night: A chance of showers. Cloudy, with a low around 59.
Monday: A chance of showers. Mostly cloudy, with a high near 71.
Monday Night: A chance of showers. Mostly cloudy, with a low around 58.
Tuesday: A chance of showers. Partly sunny, with a high near 72.
WeatherWorld.com
