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Fairfield, IL 7-Day Weather Forecast
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Fairfield Weather Forecast
Fairfield, IL Weather Forecast Date: 1047 PM CDT Thu Sep 03 2026
Weather forecast for Fairfield, IL
Tonight Lo: 75°F Lo: 24°C |
Tonight... Mostly clear. Lows in the mid 70s. South winds around 5 mph this evening, becoming light and variable. |
Fri Hi: 100°FHi: 38°C Lo: 75°F Lo: 24°C |
Friday... Sunny, hot with highs around 100. West winds around 5 mph. |
| Sat Hi: 99°FHi: 37°C Lo: 70°F Lo: 21°C |
Saturday... Sunny, hot with highs in the upper 90s. West winds around 5 mph. |
| Sun Hi: 95°FHi: 35°C Lo: 65°F Lo: 18°C |
Sunday... Mostly clear. Highs in the mid 90s. Lows in the mid 60s. |
| Mon Hi: 95°FHi: 35°C Lo: 65°F Lo: 18°C |
Monday... Mostly clear. Highs in the mid 90s. Lows in the mid 60s. |
| Tue Hi: 95°FHi: 35°C Lo: 65°F Lo: 18°C |
Tuesday... Mostly clear. Highs in the mid 90s. Lows in the mid 60s. |
| Tue Hi: 95°FHi: 35°C Lo: 75°F Lo: 24°C |
Tuesday... Mostly clear. Highs in the mid 90s. Lows in the mid 60s. |
| Wed Hi: 99°FHi: 37°C Lo: 75°F Lo: 24°C |
Wednesday... Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. |
| Wed Hi: 99°FHi: 37°C Lo: 75°F Lo: 24°C |
Wednesday... Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. |
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