Weather in Dennison, IL
Updated 2026-09-26 10:00 local time · ZIP codes 62423
Cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
64°8% rain64°8% rain
67°10% rain69°10% rain71°10% rain72°10% rain73°9% rain72°9% rain71°10% rain70°11% rain
66°11% rain63°12% 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 12%).
It feels like 58°F with winds near 8 mph.
69°F, 10% rain chance and 7 mph wind.
Visibility is around 6 mi; gusts may reach 16 mph.
Current temperature is 64°F, wind 8 mph, rain chance up to 12%.
UV index is 3.
Local weather characteristics in Dennison
Illinois has four distinct seasons with hot, humid summers, cold winters, strong frontal changes and frequent spring and summer thunderstorms.
Dennison is part of the Midwest weather region. The forecast point is near 39.46°N latitude and 87.60°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.
Dennison weather today
Cloudy and 64°F in Dennison, IL. Today's high is 73°F with a 10% rain chance. Winds are around 8 mph with gusts near 9 mph. Relative humidity is 49%, pressure is 30.18 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Dennison
Sunrise is at 06:41 AM and sunset is at 06:41 PM. Tomorrow's forecast calls for Overcast with a high near 75°F and a low near 53°F. The maximum rain chance is 11%.