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Lyon, MO Weather Forecast
Lyon, MO Weather Forecast Date: 128 PM CDT Mon Sep 07 2026
The area/counties/county of: Gasconade County Mo, including the cities of: Washington, Union, and Sullivan.or toggle through each period.
This Afternoon... Sunny. Near steady temperature in the mid 80s. East winds around 5 mph.
Tonight... Mostly clear. Lows in the lower 60s. Southeast winds around 5 mph.
Tuesday... Mostly sunny. Highs in the mid 90s. South winds around 5 mph.
Tuesday Night... Mostly clear. Lows in the lower 70s. South winds around 5 mph. Gusts up to 20 mph after midnight.
Wednesday... Sunny. Showers likely with a chance of thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 60%. Heat index values up to 107.
Wednesday Night... Showers with a chance of thunderstorms. Lows in the upper 60s. Highs in the lower 80s. Chance of rain near 100%.
Thursday... Showers with a chance of thunderstorms. Lows in the upper 60s. Highs in the lower 80s. Chance of rain near 100%.
Thursday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 60s.
Friday... Partly cloudy with a chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. Lows in the mid 60s. Chance of rain 40%.
Saturday... Partly cloudy with a chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. Lows in the mid 60s. Chance of rain 40%.
Saturday Night... Mostly clear with a 20% chance of showers. Lows in the mid 60s.
POP = Probability of Precipitation
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