Weather WorldNational Park, IL 7-Day Weather Forecast
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National Park Weather Forecast
National Park, IL Weather Forecast Date: 1005 PM CDT Wed Aug 26 2026
Weather forecast for National Park, IL
Tonight Lo: 65°F Lo: 18°C |
Tonight... Mostly clear. Lows in the mid 60s. Northwest winds around 5 mph. |
Thu Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Thursday... Mostly sunny in the morning, then becoming partly cloudy. A slight chance of showers in the afternoon. Highs in the lower 80s inland, but only in the upper 70s near the lake. North winds 5 to 10 mph. Chance of precipitation 20%. |
Fri Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Friday... Mostly sunny. Highs in the lower 80s. South winds around 5 mph. |
Sat Hi: 81°FHi: 27°C Lo: 69°F Lo: 21°C |
Saturday... Partly cloudy in the morning, then becoming mostly cloudy. Highs in the lower 80s. |
Sun Hi: 89°FHi: 32°C Lo: 71°F Lo: 22°C |
Sunday... Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Breezy with highs in the upper 80s. Chance of precipitation 20%. |
Mon Hi: 90°FHi: 32°C Lo: 71°F Lo: 22°C |
Monday... Mostly cloudy. Highs around 90. |
| Tue Hi: 89°FHi: 32°C Lo: 70°F Lo: 21°C |
Tuesday... Partly cloudy. Highs in the upper 80s. |
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