Updated 2026-08-11 11:15 local time · ZIP codes 61459
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.
83°4% rain94°2% rain97°2% rain97°2% rain98°1% rain98°1% rain97°1% rain96°1% rain93°2% rain89°2% rain
87°3% rain84°4% rain
Rain chance stays relatively low over the next 12 hours (up to 4%).
It feels like 87°F with winds near 13 mph.
83°F, 4% rain chance and 13 mph wind.
Visibility is around 10 mi; gusts may reach 20 mph.
Current temperature is 83°F, wind 13 mph, rain chance up to 4%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
Sunny and 83°F in Marietta, IL. Today's high is 98°F with a 4% rain chance. Winds are around 13 mph with gusts near 17 mph. Relative humidity is 84%, pressure is 29.96 inHg, and visibility is about 10 miles.
Sunrise is at 06:08 AM and sunset is at 08:05 PM. Tomorrow's forecast calls for Sunny with a high near 84°F and a low near 72°F. The maximum rain chance is 63%.
