| National Weather Service Forecast for:
Crystal Lake IL Issued by: National Weather Service Chicago, IL |
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| Updated: 1:21 pm CDT Mar 19, 2026 | ||||||||||||||||||
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| This Afternoon |
Mostly sunny, with a high near 56. East southeast wind around 5 mph. |
| Tonight |
Mostly cloudy, with a low around 38. East wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph. |
| Friday |
Partly sunny, with a high near 58. West southwest wind around 10 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph. |
| Friday Night |
Mostly cloudy, with a low around 37. North wind around 5 mph becoming southeast after midnight. |
| Saturday |
Mostly sunny, with a high near 64. South wind 5 to 10 mph, with gusts as high as 15 mph. |
| Saturday Night |
Partly cloudy, with a low around 48. |
| Sunday |
Mostly cloudy, with a high near 61. |
| Sunday Night |
Mostly cloudy, with a low around 30. |
| Monday |
Mostly sunny, with a high near 46. |
| Monday Night |
Mostly cloudy, with a low around 31. |
| Tuesday |
Mostly cloudy, with a high near 52. |
| Tuesday Night |
Mostly cloudy, with a low around 34. |
| Wednesday |
Mostly cloudy, with a high near 53. |
Forecast from NOAA-NWS for Crystal Lake IL.
