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

53°F

12°C

Humidity 63%
Wind Speed S 5 mph
Barometer 30.10 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 30 Mar 1:35 am CDT
Extended Forecast for

Fairfield IL

  • Overnight

    Overnight: Partly cloudy, with a low around 57. South southwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. South southwest wind 11 to 18 mph, with gusts as high as 31 mph.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Breezy, with a south southwest wind 14 to 23 mph, with gusts as high as 36 mph.

    High: 82 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 61. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 78. South southwest wind 8 to 10 mph. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. South wind 13 to 18 mph, with gusts as high as 28 mph.

    High: 77 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 61. South southwest wind 14 to 16 mph, with gusts as high as 25 mph.

    Low: 61 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. South southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 79. South southwest wind 11 to 18 mph, with gusts as high as 31 mph.
Monday Night
Mostly clear, with a low around 64. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 82. Breezy, with a south southwest wind 14 to 23 mph, with gusts as high as 36 mph.
Tuesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 61. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Showers and possibly a thunderstorm. High near 78. South southwest wind 8 to 10 mph. Chance of precipitation is 80%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind 8 to 11 mph, with gusts as high as 22 mph.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. South wind 13 to 18 mph, with gusts as high as 28 mph.
Thursday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 61. South southwest wind 14 to 16 mph, with gusts as high as 25 mph.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. South southwest wind 9 to 11 mph, with gusts as high as 18 mph.
Friday Night
Showers likely. Mostly cloudy, with a low around 59. South wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday
Showers and thunderstorms likely. Mostly cloudy, with a high near 70. South wind 11 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 42. West wind 11 to 13 mph, with gusts as high as 21 mph.
Sunday
A chance of showers. Mostly sunny, with a high near 57. West northwest wind around 14 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Fairfield IL
 38.38°N 88.37°W
Last Update:
1:26 am CDT Mar 30, 2026
Forecast Valid:
1am CDT Mar 30, 2026-6pm CDT Apr 5, 2026
 
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Additional Resources

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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