National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Fairfield, Fairfield Municipal Airport (KFWC)

Lat: 38.38°NLon: 88.41°WElev: 436ft.

Mostly Cloudy

83°F

28°C

Humidity 45%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 20 Jun 12:35 pm CDT
Extended Forecast for

3 Miles SSW Fairfield IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. Calm wind becoming west northwest around 5 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 65. Light and variable wind.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then showers and thunderstorms likely after 4pm. Increasing clouds, with a high near 86. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    High: 86 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Some of the storms could produce heavy rainfall. Low around 69. Southwest wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    Low: 69 °F

    Heavy Rain
    then Showers
    Likely

  • Monday

    Monday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 79. West southwest wind around 10 mph becoming north northwest in the afternoon. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming light in the evening.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. Light northeast wind.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 86. Calm wind becoming west northwest around 5 mph.
Tonight
Partly cloudy, with a low around 65. Light and variable wind.
Sunday
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then showers and thunderstorms likely after 4pm. Increasing clouds, with a high near 86. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Some of the storms could produce heavy rainfall. Low around 69. Southwest wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Monday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 79. West southwest wind around 10 mph becoming north northwest in the afternoon. Chance of precipitation is 50%.
Monday Night
Partly cloudy, with a low around 61. North wind 5 to 9 mph becoming light in the evening.
Tuesday
Mostly sunny, with a high near 80. Light northeast wind.
Tuesday Night
Mostly clear, with a low around 61. Calm wind.
Wednesday
Mostly sunny, with a high near 83. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 62. Light west wind.
Thursday
Mostly sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 62. Light north wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Light and variable wind.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Fairfield IL
 38.34°N 88.38°W
Last Update:
12:06 pm CDT Jun 20, 2026
Forecast Valid:
12pm CDT Jun 20, 2026-6pm CDT Jun 26, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation