Weather in Monticello, IL
Updated 2026-08-11 11:15 local time · ZIP codes 61856
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
83°3% rain97°2% rain99°2% rain98°2% rain97°2% rain93°2% rain93°2% rain91°3% rain88°3% rain
85°4% rain82°5% rain81°7% 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 7%).
It feels like 86°F with winds near 14 mph.
85°F, 4% rain chance and 7 mph wind.
Visibility is around 10 mi; gusts may reach 18 mph.
Current temperature is 83°F, wind 14 mph, rain chance up to 7%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Monticello weather today
Sunny and 83°F in Monticello, IL. Today's high is 99°F with a 5% rain chance. Winds are around 14 mph with gusts near 18 mph. Relative humidity is 79%, pressure is 29.96 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Monticello
Sunrise is at 06:02 AM and sunset is at 07:56 PM. Tomorrow's forecast calls for Sunny with a high near 77°F and a low near 69°F. The maximum rain chance is 77%.