Weather WorldMerdian Lake, IL 7-Day Night Weather Forecast
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Merdian Lake, IL Weather Forecast
Merdian Lake, IL Weather Forecast Date: 137 AM CDT Sat Aug 29 2026
The area/counties/county of: Marshall, including the city of Lacon.or toggle through each period.
Rest of Tonight... Mostly clear. Near steady temperature in the mid 60s. South winds around 5 mph.
Saturday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 80s. South winds 5 to 10 mph.
Saturday Night... Partly cloudy. Lows in the upper 60s. South winds 5 to 10 mph with gusts up to 25 mph.
Sunday... Mostly sunny. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 25 mph.
Sunday Night... Partly cloudy. Lows in the lower 70s. South winds around 10 mph with gusts up to 20 mph.
Monday... Partly cloudy. Highs in the lower 90s. Lows in the mid 70s.
Tuesday... Partly cloudy. Highs in the lower 90s. Lows in the mid 70s.
Tuesday Night... Mostly clear. Lows in the lower 70s. Highs in the lower 90s.
Wednesday... Mostly clear. Lows in the lower 70s. Highs in the lower 90s.
Thursday... Mostly sunny. Highs around 90.
Thursday Night... Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers after midnight. Lows in the lower 70s. Chance of rain 30%.
POP = Probability of Precipitation
Merdian Lake Radar Loop
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