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

65°F

18°C

Humidity 76%
Wind Speed S 6 mph
Barometer 29.94 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 1 Apr 3:55 am CDT
Extended Forecast for

4 Miles S Johnsonville IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South southwest wind around 6 mph.

    Low: 63 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 74. Southwest wind 5 to 9 mph. Chance of precipitation is 80%.

    High: 74 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 63. East southeast wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78. Breezy, with a south wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 39 mph.

    High: 78 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. South southwest wind 10 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. South southwest wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    High: 80 °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 60. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 60 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 68. South southwest wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 68 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. West northwest wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South southwest wind around 6 mph.
Wednesday
Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 74. Southwest wind 5 to 9 mph. Chance of precipitation is 80%.
Wednesday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 63. East southeast wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78. Breezy, with a south wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 39 mph.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. South southwest wind 10 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. South southwest wind 9 to 14 mph, with gusts as high as 22 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 60. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 68. South southwest wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 39. West northwest wind 10 to 13 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 55. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 34. North northwest wind 5 to 9 mph becoming calm after midnight.
Monday
Sunny, with a high near 62. Calm wind becoming south southwest around 6 mph in the morning.
Monday Night
Partly cloudy, with a low around 40. Light and variable wind becoming west around 5 mph after midnight.
Tuesday
Sunny, with a high near 60. North wind 6 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Johnsonville IL
 38.45°N 88.54°W
Last Update:
3:22 am CDT Apr 1, 2026
Forecast Valid:
3am CDT Apr 1, 2026-6pm CDT Apr 7, 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