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.

Fair

80°F

27°C

Humidity 38%
Wind Speed SW 16 G 26 mph
Barometer 29.89 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 31 Mar 6:55 pm CDT
Extended Forecast for

Fairfield IL

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 63. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 79. South southwest wind around 7 mph. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 65. East southeast wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 14 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.

    High: 79 °F

    Breezy.
    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 63. South southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. South wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 59 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 70. South wind 13 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 70 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. Northwest wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 63. South southwest wind 6 to 15 mph, with gusts as high as 25 mph.
Wednesday
A chance of showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 79. South southwest wind around 7 mph. Chance of precipitation is 60%.
Wednesday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 65. East southeast wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 14 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.
Thursday Night
Showers and possibly a thunderstorm. Low around 63. South southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. South wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 70. South wind 13 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. Northwest wind 10 to 13 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 53. Northwest wind 11 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 34. North wind 5 to 8 mph.
Monday
Sunny, with a high near 60. Northeast wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 39. Southeast wind around 6 mph.
Tuesday
Sunny, with a high near 66. Southwest wind 6 to 9 mph becoming northwest in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Fairfield IL
 38.38°N 88.37°W
Last Update:
6:26 pm CDT Mar 31, 2026
Forecast Valid:
6pm CDT Mar 31, 2026-6pm CDT Apr 7, 2026
 
Forecast Discussion
 
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Additional Resources

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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