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Simpson, IL Weather Forecast
Simpson, IL Weather Forecast Date: 128 PM CDT Tue Oct 27 2026
The area/counties/county of: Johnson, including the city of Vienna.or toggle through each period.
This Afternoon... Mostly cloudy. Near steady temperature in the lower 70s. South winds around 5 mph.
Tonight... Mostly cloudy in the evening, then clearing. Patchy fog after midnight. Lows in the upper 40s. Calm winds.
Wednesday... Patchy fog in the morning. Sunny. Highs in the upper 70s. South winds around 5 mph.
Wednesday Night... Clear. Lows in the upper 40s. Calm winds, becoming south around 5 mph after midnight.
Thursday... Sunny. Highs in the upper 70s. South winds 5 to 10 mph.
Thursday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 50s.
Friday... Mostly cloudy. Highs in the upper 70s. Lows in the mid 50s.
Friday Night... Mostly cloudy. Highs in the upper 70s. Lows in the mid 50s.
Saturday... Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 30%.
Saturday Night... Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Chance of rain 60%.
Sunday... Mostly cloudy. A chance of showers in the morning. Highs in the upper 60s. Chance of rain 50%.
Sunday Night... Mostly cloudy. Lows in the mid 50s.
POP = Probability of Precipitation
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