Weather WorldGreenville Lake, IL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Greenville Lake, IL Weather Forecast
Greenville Lake, IL Weather Forecast Date: 602 PM CDT Wed Aug 19 2026
The area/counties/county of: Montgomery County Il, including the cities of: Litchfield and Vandalia.or toggle through each period.
Tonight... Mostly cloudy with a chance of showers and thunderstorms. Patchy fog after midnight. Lows in the upper 60s. Northeast winds around 5 mph this evening, becoming light and variable. Chance of rain 50%.
Thursday... Mostly cloudy in the morning, then becoming mostly sunny. Patchy fog in the morning. Highs in the lower 80s. Northeast winds around 5 mph.
Thursday Night... Mostly clear. Lows in the lower 60s. Northeast winds around 5 mph in the evening, becoming light and variable.
Friday... Sunny. Highs in the mid 80s. Light and variable winds, becoming west around 5 mph in the afternoon.
Friday Night... Mostly clear. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 60s. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 30%.
Saturday... Sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20%.
Saturday Night... Mostly clear. Lows in the lower 60s.
Sunday... Mostly sunny. Highs in the lower 80s.
Sunday Night... Partly cloudy. A 20% chance of showers. Lows in the lower 60s. Highs in the lower 80s.
Monday... Partly cloudy. A 20% chance of showers. Lows in the lower 60s. Highs in the lower 80s.
Monday Night... Partly cloudy in the evening, then mostly clear with a slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20%.
Tuesday... Partly cloudy. Highs in the mid 80s. Lows in the mid 60s.
POP = Probability of Precipitation
Greenville Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...