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.

Overcast

63°F

17°C

Humidity 73%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 3 Mar 6:35 pm CST
Extended Forecast for

Fairfield IL

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 51. South wind 5 to 7 mph becoming light and variable in the evening. Chance of precipitation is 80%.

    Low: 51 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. High near 69. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 90%.

    High: 69 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 58. South wind 3 to 7 mph. Chance of precipitation is 90%.

    Low: 58 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 69. Southwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 90%.

    High: 69 °F

    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. South wind 3 to 7 mph. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms before 9am, then a chance of showers between 9am and noon. Partly sunny, with a high near 78. South southwest wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 61 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 69. South southwest wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 69 °F

    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. West northwest wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 51. South wind 5 to 7 mph becoming light and variable in the evening. Chance of precipitation is 80%.
Wednesday
Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. High near 69. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 58. South wind 3 to 7 mph. Chance of precipitation is 90%.
Thursday
Showers and possibly a thunderstorm. High near 69. Southwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 90%.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. South wind 3 to 7 mph. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms before 9am, then a chance of showers between 9am and noon. Partly sunny, with a high near 78. South southwest wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Friday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 69. South southwest wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 45. West northwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 64. Calm wind becoming southwest around 6 mph in the morning.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 49. South southwest wind 3 to 6 mph.
Monday
A slight chance of showers. Sunny, with a high near 72. South southwest wind 5 to 9 mph.
Monday Night
A chance of showers. Mostly clear, with a low around 58. South southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 75. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Fairfield IL
 38.38°N 88.37°W
Last Update:
6:17 pm CST Mar 3, 2026
Forecast Valid:
6pm CST Mar 3, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation