Weather forecast for: Crystal Lake IL
Last Update: 1:21 pm CDT Sep 11, 2026
This Afternoon: Sunny, with a high near 79. South wind around 10 mph.
Tonight: Partly cloudy, with a low around 63. Southeast wind around 5 mph, with gusts as high as 10 mph.
Saturday: Mostly sunny, with a high near 83. South southwest wind 5 to 15 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Saturday Night: Partly cloudy, with a low around 58. North northwest wind around 5 mph, with gusts as high as 10 mph.
Sunday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 74. North northwest wind 5 to 10 mph.
Sunday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 52.
Monday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 73.
Monday Night: A chance of showers after 1am. Mostly cloudy, with a low around 64.
Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81.
Tuesday Night: Showers likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 61.
Wednesday: Showers likely. Mostly cloudy, with a high near 72.
Wednesday Night: Showers likely. Mostly cloudy, with a low around 59.
Thursday: A chance of showers. Partly sunny, with a high near 74.
WeatherWorld.com
