| NWS Forecast for: Saint Charles IL Issued by: National Weather Service Chicago, IL Last Update: 8:21 pm CDT Oct 12, 2026 |  |
| Tonight: Mostly clear, with a low around 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Tuesday: Sunny, with a high near 80. West northwest wind around 10 mph, with gusts as high as 20 mph. Tuesday Night: Showers and thunderstorms likely. Increasing clouds, with a low around 62. North wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible. Wednesday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 70. Northeast wind 5 to 10 mph, with gusts as high as 15 mph. Wednesday Night: Mostly cloudy, with a low around 53. Northeast wind around 10 mph, with gusts as high as 15 mph. Thursday: Showers and possibly a thunderstorm. High near 65. Chance of precipitation is 80%. Thursday Night: A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 47. Friday: Partly sunny, with a high near 58. Breezy. Friday Night: Mostly clear, with a low around 36. Saturday: Sunny, with a high near 58. Saturday Night: Mostly clear, with a low around 38. Sunday: Sunny, with a high near 63. Sunday Night: Partly cloudy, with a low around 46. Monday: Mostly sunny, with a high near 68. | |
| Saint Charles IL 41.9°N 88.32°W | |
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