Weather WorldHalfmoon Lake, IL 7-Day Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Halfmoon Lake Weather Forecast
Halfmoon Lake, IL Weather Forecast Date: 127 PM CDT Mon Oct 12 2026
Weather forecast for Halfmoon Lake, IL
Today Hi: 91°FHi: 33°C Lo: 69°F Lo: 21°C |
This Afternoon... Sunny. Near steady temperature in the lower 90s. Southwest winds 10 to 15 mph. |
| Tue Hi: 95°FHi: 35°C Lo: 71°F Lo: 22°C |
Tuesday... Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 101 in the afternoon. |
Wed Hi: 81°FHi: 27°C Lo: 65°F Lo: 18°C |
Wednesday... A chance of thunderstorms. Showers, cooler with highs in the lower 80s. West winds around 5 mph. Chance of rain near 100%. |
| Thu Hi: 81°FHi: 27°C Lo: 51°F Lo: 11°C |
Thursday... Showers with a chance of thunderstorms. Highs in the lower 80s. Chance of rain 90%. |
| Fri Hi: 65°FHi: 18°C Lo: 40°F Lo: 4°C |
Friday... Mostly sunny and breezy. Much cooler with highs in the mid 60s. |
| Sat Hi: 61°FHi: 16°C Lo: 40°F Lo: 4°C |
Saturday... Mostly clear. Lows around 40. Highs in the lower 60s. |
| Sat Hi: 61°FHi: 16°C Lo: 40°F Lo: 4°C |
Saturday... Mostly clear. Lows around 40. Highs in the lower 60s. |
Halfmoon Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...