Weather World
Barths Lake, IL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Barths Lake, IL Weather Forecast
Barths Lake, IL Weather Forecast Date: 128 PM CDT Thu Aug 13 2026
The area/counties/county of: Greene County Il, Jersey County Il.or toggle through each period.
This Afternoon... Mostly sunny. Highs in the lower 90s. South winds around 5 mph. Heat index values up to 107.
Tonight... Partly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Humid with lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of rain 40%. Heat index values up to 107 early in the evening.
Friday... Sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the mid 90s. Southeast winds around 5 mph. Chance of rain 20%. Heat index values up to 109 in the afternoon.
Friday Night... Mostly clear. Humid with lows in the mid 70s. Southeast winds around 5 mph. Heat index values up to 107 early in the evening.
Saturday... Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107.
Saturday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. Heat index values up to 105 early in the evening.
Sunday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20%. Heat index values up to 105.
Sunday Night... Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 50%. Heat index values up to 100 early in the evening.
Monday... Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20%.
Monday Night... Partly cloudy. Lows in the mid 60s.
Tuesday... Sunny. Highs in the upper 80s.
Tuesday Night... Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 20%.
POP = Probability of Precipitation
Barths Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...