Weather WorldArrowhead Lake, IL 7-Day Weather Forecast
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Arrowhead Lake Weather Forecast
Arrowhead Lake, IL Weather Forecast Date: 602 PM CDT Thu Sep 10 2026
Weather forecast for Arrowhead Lake, IL
Tonight Lo: 61°F Lo: 16°C |
Tonight... Mostly cloudy. A slight chance of showers this evening. Lows in the lower 60s. Northeast winds around 5 mph. Chance of rain 20%. |
Fri Hi: 81°FHi: 27°C Lo: 65°F Lo: 18°C |
Friday... Patchy fog in the morning. Partly sunny. Highs in the lower 80s. East winds 5 to 10 mph. |
Sat Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Saturday... Mostly sunny. Humid with highs in the mid 80s. Southwest winds 5 to 10 mph. |
Sun Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Sunday... Partly cloudy. Highs in the mid 80s. Lows around 60. |
| Mon Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Monday... Partly cloudy. Highs in the mid 80s. Lows around 60. |
| Mon Hi: 85°FHi: 29°C Lo: 69°F Lo: 21°C |
Monday... Partly cloudy. Highs in the mid 80s. Lows around 60. |
Tue Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Tuesday... Sunny. A chance of showers in the afternoon. Highs in the upper 80s. Chance of rain 30%. |
| Wed Hi: 81°FHi: 27°C Lo: 65°F Lo: 18°C |
Wednesday... Showers likely. Highs in the lower 80s. Chance of rain 60%. |
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