Weather forecast for: Fairfield IL
Last Update: 6:21 pm CDT Sep 3, 2026
Tonight: Clear, with a low around 74. Calm wind.
Friday: Sunny and hot, with a high near 99. Calm wind becoming west southwest around 5 mph in the afternoon.
Friday Night: Mostly clear, with a low around 75. Calm wind.
Saturday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 99. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night: A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 70. Calm wind. Chance of precipitation is 10%.
Sunday: Sunny, with a high near 93. Light northeast wind increasing to 5 to 10 mph in the morning.
Sunday Night: Mostly clear, with a low around 65. East northeast wind 5 to 11 mph.
Labor Day: Sunny, with a high near 91. East northeast wind 3 to 6 mph.
Monday Night: Mostly clear, with a low around 66. East wind around 5 mph becoming calm in the evening.
Tuesday: Sunny, with a high near 95. Calm wind becoming south around 6 mph in the morning.
Tuesday Night: Mostly clear, with a low around 73. South southeast wind 5 to 7 mph.
Wednesday: Sunny and hot, with a high near 99. Southwest wind 7 to 10 mph.
Wednesday Night: A slight chance of showers. Mostly clear, with a low around 74. South southwest wind around 8 mph.
Thursday: A slight chance of showers. Mostly sunny, with a high near 94. West wind 8 to 11 mph.
WeatherWorld.com
