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Village of Chatham, IllinoisChatham, IL 7-Day Weather Forecast
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Chatham Weather Forecast
Chatham, IL Weather Forecast Date: 446 PM CDT Wed Sep 16 2026
Weather forecast for Chatham, IL
Late Today Hi: 71°FHi: 22°C Lo: 69°F Lo: 21°C |
Late This Afternoon... Mostly cloudy. Scattered showers. Temperatures in the lower 70s. Northeast winds around 10 mph. Chance of precipitation 30%. |
Thu Hi: 75°FHi: 24°C Lo: 65°F Lo: 18°C |
Thursday... Cloudy. Showers and thunderstorms in the morning, then scattered showers and thunderstorms early in the afternoon. Humid with highs in the mid 70s. Northwest winds around 5 mph, becoming north in the afternoon. Chance of precipitation 80%. |
Fri Hi: 75°FHi: 24°C Lo: 65°F Lo: 18°C |
Friday... Partly cloudy in the morning, then becoming mostly cloudy. Highs in the mid 70s inland, but only in the lower 70s near the lake. East winds 5 to 10 mph. |
| Sat Hi: 81°FHi: 27°C Lo: 65°F Lo: 18°C |
Saturday... Numerous showers and thunderstorms. Highs in the lower 80s. Chance of precipitation 70%. |
Sun Hi: 71°FHi: 22°C Lo: 61°F Lo: 16°C |
Sunday... Cloudy with a chance of showers. Highs in the lower 70s. Chance of precipitation 50%. |
| Mon Hi: 70°FHi: 21°C Lo: 59°F Lo: 15°C |
Monday... Mostly cloudy with a chance of showers. Highs around 70. Chance of precipitation 50%. |
| Tue Hi: 69°FHi: 21°C Lo: 59°F Lo: 15°C |
Tuesday... Mostly cloudy with a 40% chance of showers. Highs in the upper 60s. |
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