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Promontory Point Park, IL 7-Day Weather Forecast
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Promontory Point Park Weather Forecast
Promontory Point Park, IL Weather Forecast Date: 216 PM CDT Tue Sep 01 2026
Weather forecast for Promontory Point Park, IL
Late Today Hi: 95°FHi: 35°C Lo: 75°F Lo: 24°C |
Late This Afternoon... Partly cloudy. Isolated showers and thunderstorms. Temperatures in the mid 90s. Southwest winds around 10 mph. Chance of precipitation 20%. Heat index values up to 107. |
Wed Hi: 95°FHi: 35°C Lo: 75°F Lo: 24°C |
Wednesday... Mostly sunny. Hot, humid with highs in the mid 90s. Southwest winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Heat index values up to 100. |
| Thu Hi: 90°FHi: 32°C Lo: 75°F Lo: 24°C |
Thursday... Partly cloudy in the morning, then becoming mostly cloudy. A slight chance of showers and thunderstorms. Humid with highs around 90. West winds around 5 mph. Chance of precipitation 20%. |
| Fri Hi: 89°FHi: 32°C Lo: 71°F Lo: 22°C |
Friday... Partly cloudy. A chance of showers and thunderstorms, mainly in the morning. Highs in the upper 80s inland, but only in the lower 80s near the lake. Chance of precipitation 50%. |
| Sat Hi: 85°FHi: 29°C Lo: 71°F Lo: 22°C |
Saturday... Partly cloudy. A chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of precipitation 50%. |
Sun Hi: 81°FHi: 27°C Lo: 69°F Lo: 21°C |
Sunday... Mostly cloudy. A chance of showers in the morning. Highs in the lower 80s. Chance of precipitation 30%. |
Labor Day Hi: 80°FHi: 27°C Lo: 65°F Lo: 18°C |
Labor Day... Mostly cloudy. Highs around 80. |
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