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

Jacksonville Municipal Airport (KIJX)

Lat: 39.77°NLon: 90.24°WElev: 614ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

South Jacksonville IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 27. South southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 39. West wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 39 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 19. Southwest wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 23 mph.

    Low: 19 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 31. West northwest wind 3 to 7 mph.

    High: 31 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 2. Light north northwest wind becoming north 11 to 16 mph in the evening. Winds could gust as high as 24 mph.

    Low: 2 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near 7. North wind 13 to 16 mph, with gusts as high as 24 mph.

    High: 7 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -2. North northeast wind around 11 mph, with gusts as high as 20 mph.

    Low: -2 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Cloudy, with a high near 11.

    High: 11 °F

    Cloudy then
    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 4.

    Low: 4 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 27. South southwest wind around 15 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 39. West wind 11 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
Partly cloudy, with a low around 19. Southwest wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 23 mph.
Thursday
Partly sunny, with a high near 31. West northwest wind 3 to 7 mph.
Thursday Night
Mostly cloudy, with a low around 2. Light north northwest wind becoming north 11 to 16 mph in the evening. Winds could gust as high as 24 mph.
Friday
Partly sunny and cold, with a high near 7. North wind 13 to 16 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around -2. North northeast wind around 11 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of snow after noon. Cloudy, with a high near 11.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 4.
Sunday
Partly sunny, with a high near 18.
Sunday Night
Partly cloudy, with a low around 2.
Monday
Mostly sunny, with a high near 22.
Monday Night
Mostly clear, with a low around 8.
Tuesday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Jacksonville IL
 39.7°N 90.24°W (Elev. 650 ft)
Last Update:
11:36 pm CST Jan 20, 2026
Forecast Valid:
12am CST Jan 21, 2026-6pm CST Jan 27, 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