Heat Index Near 111 Monday
National Weather Service forecast for Marion area; slight shower chance
By Dot "Doppler" Hollis, Williamson County Bureau
MARION, Ill. — Overnight into Monday, a slight chance of showers before 5 a.m., then the heat settles in.
The National Weather Service forecasts sunny skies Monday with a high near 99 degrees—but heat index values climbing to 111. That's the real story here: not the air temperature alone, but the feel-like heat that makes outdoor labor dangerous. If you're working in the sun, starting early and pacing yourself isn't optional.
Monday night brings a slight chance of thunderstorms between 7 and 8 p.m., with heat index still near 110. Tuesday stays mostly sunny and hot, high near 95, heat index 105. Relief edges in Wednesday: sunny and cooler, high near 89.
Through Tuesday night, a slight chance of showers before 1 a.m. The story ahead is heat. Drink water. Check on neighbors. Avoid peak sun hours when you can.
Watch the sky, keep the radio on.
- Forecast data from the National Weather Service.
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