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

Hazardous Weather Conditions

Current conditions at

Fairfield, Fairfield Municipal Airport (KFWC)

Lat: 38.38°NLon: 88.41°WElev: 436ft.

Fair

80°F

27°C

Humidity 40%
Wind Speed S 14 mph
Barometer 29.89 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 15 May 4:35 pm CDT
Extended Forecast for

Johnsonville IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. South wind around 11 mph, with gusts as high as 20 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 66. South wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 66 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 83. South southwest wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 64. South wind around 6 mph.

    Low: 64 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 88. South wind 8 to 15 mph, with gusts as high as 22 mph.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 67 °F

    Mostly Clear

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89. South wind 11 to 18 mph, with gusts as high as 26 mph.

    High: 89 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind 13 to 15 mph, with gusts as high as 23 mph.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. Partly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 24 mph.

    High: 82 °F

    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. South wind around 11 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 66. South wind 8 to 10 mph, with gusts as high as 21 mph.
Saturday
Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 83. South southwest wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 64. South wind around 6 mph.
Sunday
Sunny, with a high near 88. South wind 8 to 15 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 67. South wind around 10 mph, with gusts as high as 20 mph.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89. South wind 11 to 18 mph, with gusts as high as 26 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind 13 to 15 mph, with gusts as high as 23 mph.
Tuesday
Showers and possibly a thunderstorm. Partly sunny, with a high near 82. South southwest wind 13 to 17 mph, with gusts as high as 24 mph.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. Southwest wind 6 to 9 mph becoming north northwest after midnight.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 73. North wind around 9 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 54. North wind around 7 mph.
Thursday
Mostly sunny, with a high near 74. Northeast wind around 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Johnsonville IL
 38.5°N 88.54°W
Last Update:
1:26 pm CDT May 15, 2026
Forecast Valid:
4pm CDT May 15, 2026-6pm CDT May 21, 2026
 
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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