Updated 2026-08-11 10:15 local time · ZIP codes 61542
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.
86°4% rain93°4% rain95°3% rain97°2% rain98°2% rain99°1% rain97°1% rain96°1% rain96°1% rain93°2% rain88°3% rain
85°3% rain
Rain chance stays relatively low over the next 12 hours (up to 4%).
It feels like 93°F with winds near 11 mph.
86°F, 4% rain chance and 11 mph wind.
Visibility is around 5 mi; gusts may reach 17 mph.
Current temperature is 86°F, wind 11 mph, rain chance up to 4%.
UV index is 1.
Sunny and 86°F in Lewistown, IL. Today's high is 99°F with a 5% rain chance. Winds are around 11 mph with gusts near 15 mph. Relative humidity is 64%, pressure is 29.87 inHg, and visibility is about 5 miles.
Sunrise is at 06:07 AM and sunset is at 08:03 PM. Tomorrow's forecast calls for Sunny with a high near 85°F and a low near 71°F. The maximum rain chance is 62%.
