Weather WorldLake Joy, IL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Lake Joy, IL Weather Forecast
Lake Joy, IL Weather Forecast Date: 1123 AM CDT Sun Sep 13 2026
The area/counties/county of: Clinton County Il, including the cities of: Centralia and Salem.or toggle through each period.
This Afternoon... Mostly sunny. Highs in the upper 80s. North winds 5 to 10 mph.
Tonight... Partly cloudy. Lows in the mid 60s. Northeast winds 5 to 10 mph.
Monday... Mostly sunny. Highs in the mid 80s. East winds around 10 mph.
Monday Night... Clear. Lows around 70. Southeast winds 5 to 10 mph.
Tuesday... Sunny, warmer with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 107.
Tuesday Night... Mostly clear with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 70s. Chance of rain 20%. Heat index values up to 105 early in the evening.
Wednesday... Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 105 in the afternoon.
Wednesday Night... Mostly clear. Lows in the lower 70s. Heat index values up to 100 early in the evening.
Thursday... Partly cloudy. A slight chance of showers and thunderstorms. Highs in the mid 90s. Lows around 70. Chance of rain 20%. Heat index values up to 100.
Thursday Night... Partly cloudy. A slight chance of showers and thunderstorms. Highs in the mid 90s. Lows around 70. Chance of rain 20%. Heat index values up to 100.
Friday... Partly cloudy. A 20% chance of showers. Highs around 90. Lows in the mid 60s.
Friday Night... Partly cloudy. A 20% chance of showers. Highs around 90. Lows in the mid 60s.
POP = Probability of Precipitation
Lake Joy Radar Loop
Use the map search tool if you want to place a location marker on the radar map...