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Dundas, IL Weather Forecast
Dundas, IL Weather Forecast Date: 1237 PM CDT Mon Sep 14 2026
The area/counties/county of: Richland, including the city of Olney.or toggle through each period.
This Afternoon... Sunny. Highs in the mid 80s. East winds 5 to 10 mph.
Tonight... Mostly clear. Lows in the mid 60s. Southeast winds 5 to 10 mph with gusts up to 20 mph.
Tuesday... Sunny, warmer with highs in the upper 90s. South winds 5 to 10 mph. Heat index values up to 104 in the afternoon.
Tuesday Night... Partly cloudy. A chance of showers in the evening. Humid with lows in the lower 70s. South winds around 5 mph in the evening, becoming light and variable. Chance of rain 40%.
Wednesday... Sunny, hot with highs in the upper 90s. Southeast winds around 5 mph, becoming southwest around 5 mph in the afternoon. Heat index values up to 104.
Wednesday Night... Mostly clear. Hot. Lows in the lower 70s. Highs in the upper 90s.
Thursday... Mostly clear. Hot. Lows in the lower 70s. Highs in the upper 90s.
Thursday Night... Partly cloudy. Lows around 70. Highs in the lower 90s.
Friday... Partly cloudy. Lows around 70. Highs in the lower 90s.
Saturday... Sunny. Highs in the lower 90s.
Saturday Night... Partly cloudy. Lows in the upper 60s.
POP = Probability of Precipitation
Dundas Radar Loop
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