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Gillespie Weather Forecast
Gillespie, IL Weather Forecast Date: 853 AM CDT Wed Sep 16 2026
Weather forecast for Gillespie, IL
Today Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Today... Mostly cloudy with a chance of showers and thunderstorms this morning, then mostly sunny with a slight chance of showers and thunderstorms this afternoon. Highs in the lower 90s. East winds around 5 mph, becoming north around 5 mph this afternoon. Chance of rain 50%. Heat index values up to 102. |
Thu Hi: 95°FHi: 35°C Lo: 70°F Lo: 21°C |
Thursday... Sunny. Highs in the mid 90s. West winds around 5 mph. Heat index values up to 104. |
| Fri Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Friday... Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Southeast winds around 5 mph. Chance of rain 20%. |
| Sat Hi: 95°FHi: 35°C Lo: 69°F Lo: 21°C |
Saturday... Mostly sunny. Hot with highs in the mid 90s. |
| Sun Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Sunday... Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. Chance of rain 50%. |
| Mon Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Monday... Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 40%. |
Tue Hi: 80°FHi: 27°C |
Tuesday... Mostly sunny with a 20% chance of showers. Highs around 80. |
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