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.

Partly Cloudy

80°F

27°C

Humidity 62%
Wind Speed NW 7 mph
Barometer 30.08 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 17 Aug 2:55 pm CDT
Extended Forecast for

Winchester IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 82. North northwest wind around 8 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 61. Light north wind.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the morning.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers after 4am. Partly cloudy, then becoming cloudy toward daybreak, with a low around 66. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Mostly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: A 50 percent chance of showers. Mostly cloudy, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 81 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 63. Light northeast wind.

    Low: 63 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Calm wind becoming east northeast around 5 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 82. North northwest wind around 8 mph.
Tonight
Mostly clear, with a low around 61. Light north wind.
Tuesday
Mostly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the morning.
Tuesday Night
A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers after 4am. Partly cloudy, then becoming cloudy toward daybreak, with a low around 66. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 63. Light northeast wind.
Thursday
Mostly sunny, with a high near 81. Calm wind becoming east northeast around 5 mph.
Thursday Night
Mostly clear, with a low around 61.
Friday
Sunny, with a high near 82.
Friday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 63.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winchester IL
 39.62°N 90.44°W (Elev. 499 ft)
Last Update:
1:46 pm CDT Aug 17, 2026
Forecast Valid:
3pm CDT Aug 17, 2026-6pm CDT Aug 23, 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