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Barnett, IL Weather Forecast
Barnett, IL Weather Forecast Date: 152 AM CDT Sun Sep 13 2026
The area/counties/county of: Montgomery County Il, including the cities of: Litchfield and Vandalia.or toggle through each period.
Rest of Tonight... Partly cloudy. Lows in the mid 60s. North winds around 5 mph.
Sunday... Partly sunny. Highs in the mid 80s. North winds 5 to 10 mph.
Sunday Night... Partly cloudy in the evening, then becoming mostly cloudy. Less humid with lows in the lower 60s. Northeast winds 5 to 10 mph.
Monday... Mostly sunny. Highs in the mid 80s. East winds 5 to 10 mph.
Monday Night... Mostly clear. Lows in the upper 60s. Southeast winds 5 to 10 mph.
Tuesday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Warmer with highs in the mid 90s. Chance of rain 20%. Heat index values up to 105.
Tuesday Night... Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the upper 60s. Chance of rain 50%. Heat index values up to 100 early in the evening.
Wednesday... Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20%. Heat index values up to 100 in the afternoon.
Wednesday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s.
Thursday... Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20%.
Thursday Night... A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 30%.
Friday... Partly cloudy. A 30% chance of showers. Highs in the upper 80s. Lows in the lower 60s.
Friday Night... Partly cloudy. A 30% chance of showers. Highs in the upper 80s. Lows in the lower 60s.
POP = Probability of Precipitation
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