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

50°F

10°C

Humidity 87%
Wind Speed N 6 mph
Barometer 30.10 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 3 Mar 11:35 pm CST
Extended Forecast for

Sims IL

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 52. East wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. High near 68. Light and variable wind becoming south southwest 5 to 8 mph in the morning. Chance of precipitation is 90%.

    High: 68 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before midnight, then showers and possibly a thunderstorm, mainly after midnight. Low around 57. South wind 3 to 7 mph. Chance of precipitation is 100%.

    Low: 57 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 69. Southwest wind 6 to 11 mph. Chance of precipitation is 90%.

    High: 69 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 57. South wind 3 to 6 mph. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers

  • 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 wind 6 to 15 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 60. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 60 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers, mainly before noon. Mostly cloudy, with a high near 69. South southwest wind 6 to 11 mph becoming west northwest 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 44. West northwest wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 52. East wind 5 to 7 mph. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. High near 68. Light and variable wind becoming south southwest 5 to 8 mph in the morning. Chance of precipitation is 90%.
Wednesday Night
Showers and thunderstorms before midnight, then showers and possibly a thunderstorm, mainly after midnight. Low around 57. South wind 3 to 7 mph. Chance of precipitation is 100%.
Thursday
Showers and possibly a thunderstorm. High near 69. Southwest wind 6 to 11 mph. Chance of precipitation is 90%.
Thursday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 57. South wind 3 to 6 mph. Chance of precipitation is 50%.
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 wind 6 to 15 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 60. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday
Showers, mainly before noon. Mostly cloudy, with a high near 69. South southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 44. West northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 65. Calm wind becoming southwest 5 to 7 mph in the morning.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 48. West southwest wind 3 to 5 mph.
Monday
A slight chance of showers. Sunny, with a high near 73. South southwest wind 5 to 9 mph.
Monday Night
A chance of showers. Mostly clear, with a low around 57. South southwest wind 7 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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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sims IL
 38.37°N 88.54°W
Last Update:
9:46 pm CST Mar 3, 2026
Forecast Valid:
11pm 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