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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Partly Cloudy

70°F

21°C

Humidity 83%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 27 Aug 9:19 pm CDT
Extended Forecast for

Leonore IL

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 83. Calm wind becoming west southwest around 5 mph.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. Calm wind becoming south around 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 68. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 60. Calm wind.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 83. Calm wind becoming west southwest around 5 mph.
Friday Night
Partly cloudy, with a low around 61. Calm wind becoming south around 5 mph.
Saturday
Mostly sunny, with a high near 82. South wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 68. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 73.
Monday
Mostly sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 74.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Leonore IL
 41.18°N 88.98°W
Last Update:
2:51 pm CDT Aug 27, 2026
Forecast Valid:
9pm CDT Aug 27, 2026-6pm CDT Sep 3, 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