Weather in Chatham, IL
Updated 2026-09-26 11:45 local time · ZIP codes 62629
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
62°13% rain63°13% rain63°13% rain63°14% rain64°12% rain66°11% rain65°13% rain
64°11% rain63°11% rain
62°5% rain61°9% rain
63°14% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 14%).
It feels like 57°F with winds near 7 mph.
66°F, 11% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 10 mph.
Current temperature is 62°F, wind 7 mph, rain chance up to 14%.
UV index is 2.
Local weather characteristics in Chatham
Illinois has four distinct seasons with hot, humid summers, cold winters, strong frontal changes and frequent spring and summer thunderstorms.
Chatham is part of the Midwest weather region. The forecast point is near 39.68°N latitude and 89.70°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Chatham weather today
Overcast and 62°F in Chatham, IL. Today's high is 66°F with a 11% rain chance. Winds are around 7 mph with gusts near 10 mph. Relative humidity is 53%, pressure is 30.16 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Chatham
Sunrise is at 06:50 AM and sunset is at 06:49 PM. Tomorrow's forecast calls for Sunny with a high near 75°F and a low near 58°F. The maximum rain chance is 37%.