Weather in Dewey, IL
Updated 2026-08-11 11:00 local time · ZIP codes 61840
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
83°4% rain96°3% rain96°2% rain97°2% rain96°1% rain93°2% rain93°3% rain89°3% rain87°4% rain
84°5% rain82°7% rain80°10% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 10%).
It feels like 86°F with winds near 11 mph.
83°F, 4% rain chance and 11 mph wind.
Visibility is around 10 mi; gusts may reach 23 mph.
Current temperature is 83°F, wind 11 mph, rain chance up to 10%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Dewey weather today
Sunny and 83°F in Dewey, IL. Today's high is 97°F with a 6% rain chance. Winds are around 11 mph with gusts near 15 mph. Relative humidity is 79%, pressure is 29.95 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Dewey
Sunrise is at 06:00 AM and sunset is at 07:56 PM. Tomorrow's forecast calls for Sunny with a high near 78°F and a low near 69°F. The maximum rain chance is 80%.