Weather in Lemont, IL
Updated 2026-09-26 10:00 local time · ZIP codes 60439
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
61°9% rain64°10% rain66°9% rain69°9% rain69°9% rain70°8% rain70°8% rain68°10% rain64°10% rain
62°10% rain62°10% rain61°11% 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 11%).
It feels like 55°F with winds near 5 mph.
70°F, 8% rain chance and 4 mph wind.
Visibility is around 6 mi; gusts may reach 10 mph.
Current temperature is 61°F, wind 5 mph, rain chance up to 11%.
UV index is 2.
Local weather characteristics in Lemont
Illinois has four distinct seasons with hot, humid summers, cold winters, strong frontal changes and frequent spring and summer thunderstorms.
Lemont is part of the Midwest weather region. The forecast point is near 41.67°N latitude and 88.00°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.
Lemont weather today
Overcast and 61°F in Lemont, IL. Today's high is 70°F with a 7% rain chance. Winds are around 5 mph with gusts near 7 mph. Relative humidity is 40%, pressure is 30.22 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Lemont
Sunrise is at 06:43 AM and sunset is at 06:42 PM. Tomorrow's forecast calls for Overcast with a high near 71°F and a low near 58°F. The maximum rain chance is 10%.