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.

Fair

73°F

23°C

Humidity 72%
Wind Speed S 9 mph
Barometer 30.02 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 30 Aug 12:35 am CDT
Extended Forecast for

Winchester IL

  • Overnight

    Overnight: Partly cloudy, with a low around 69. South wind around 8 mph, with gusts as high as 17 mph.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93. South wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. South wind around 8 mph, with gusts as high as 17 mph.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 97. Heat index values as high as 101. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. South wind 5 to 7 mph, with gusts as high as 15 mph.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. South southwest wind 5 to 7 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. South wind 5 to 7 mph, with gusts as high as 16 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 69. South wind around 8 mph, with gusts as high as 17 mph.
Sunday
Mostly sunny, with a high near 93. South wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 73. South wind around 8 mph, with gusts as high as 17 mph.
Monday
Sunny and hot, with a high near 97. Heat index values as high as 101. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.
Monday Night
Mostly clear, with a low around 76. South wind 5 to 7 mph, with gusts as high as 15 mph.
Tuesday
Sunny and hot, with a high near 100. South southwest wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 78. South wind 5 to 7 mph, with gusts as high as 16 mph.
Wednesday
Sunny and hot, with a high near 100.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
A chance of showers. Partly cloudy, with a low around 74.
Friday
Mostly sunny, with a high near 94.
Friday Night
Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 92.
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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:
12:36 am CDT Aug 30, 2026
Forecast Valid:
12am CDT Aug 30, 2026-6pm CDT Sep 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation