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Lake Arrowhead, IL 7-Day Weather Forecast
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Lake Arrowhead Weather Forecast
Lake Arrowhead, IL Weather Forecast Date: 456 PM CDT Thu Sep 10 2026
Weather forecast for Lake Arrowhead, IL
Late Today Hi: 75°FHi: 24°C Lo: 59°F Lo: 15°C |
Late This Afternoon... Mostly cloudy. Temperatures in the mid 70s. Northeast winds 5 to 10 mph. |
Fri Hi: 80°FHi: 27°C Lo: 65°F Lo: 18°C |
Friday... Mostly sunny. Highs around 80. Southeast winds around 5 mph. |
Sat Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Saturday... Mostly cloudy in the morning, then becoming partly cloudy. Highs in the mid 80s. Southwest winds 5 to 10 mph. |
| Sun Hi: 79°FHi: 26°C Lo: 61°F Lo: 16°C |
Sunday... Partly cloudy in the morning, then becoming mostly cloudy. Highs in the upper 70s. |
| Mon Hi: 81°FHi: 27°C Lo: 70°F Lo: 21°C |
Monday... Partly cloudy in the morning, then becoming mostly cloudy. Highs in the lower 80s. |
Tue Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Tuesday... Partly cloudy. A chance of showers in the morning, then showers likely in the afternoon. Highs in the mid 80s. Chance of precipitation 60%. |
Wed Hi: 75°FHi: 24°C Lo: 61°F Lo: 16°C |
Wednesday... Mostly cloudy with a 50% chance of showers. Highs in the mid 70s. |
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