Updated 2026-08-11 10:15 local time · ZIP codes 62643
Sunny
* WHAT...Heat index values up to 105. * WHERE...Portions of central, east central, southeast, and west central Illinois. * WHEN...From noon today to 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
87°4% rain95°3% rain97°2% rain98°2% rain99°2% rain97°2% rain96°2% rain95°2% rain94°2% rain91°3% rain
86°4% rain84°5% rain
Rain chance stays relatively low over the next 12 hours (up to 5%).
It feels like 95°F with winds near 10 mph.
86°F, 4% rain chance and 5 mph wind.
Visibility is around 6 mi; gusts may reach 17 mph.
Current temperature is 87°F, wind 10 mph, rain chance up to 5%.
UV index is 3.
Sunny and 87°F in Hartsburg, IL. Today's high is 99°F with a 5% rain chance. Winds are around 10 mph with gusts near 14 mph. Relative humidity is 63%, pressure is 29.90 inHg, and visibility is about 6 miles.
Sunrise is at 06:05 AM and sunset is at 08:00 PM. Tomorrow's forecast calls for Sunny with a high near 82°F and a low near 70°F. The maximum rain chance is 72%.
