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

Mount Sterling, Mount Sterling Municipal Airport (KI63)

Lat: 39.99°NLon: 90.8°WElev: 732ft.

Fair

80°F

27°C

Humidity 82%
Wind Speed S 7 mph
Barometer 30.07 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 15 Aug 10:35 am CDT
Extended Forecast for

Naples IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 90. Heat index values as high as 103. South southwest wind 5 to 7 mph.

    High: 90 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. Calm wind becoming northwest around 6 mph after midnight.

    Low: 74 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, with a high near 87. Heat index values as high as 100. Northwest wind 3 to 8 mph.

    High: 87 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. North northwest wind 3 to 8 mph. Winds could gust as high as 15 mph.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 83. Light north wind.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Light and variable wind.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 90. Heat index values as high as 103. South southwest wind 5 to 7 mph.
Tonight
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. Calm wind becoming northwest around 6 mph after midnight.
Sunday
Partly sunny, with a high near 87. Heat index values as high as 100. Northwest wind 3 to 8 mph.
Sunday Night
Partly cloudy, with a low around 67. North northwest wind 3 to 8 mph. Winds could gust as high as 15 mph.
Monday
Sunny, with a high near 83. Light north wind.
Monday Night
Mostly clear, with a low around 64. Calm wind.
Tuesday
Sunny, with a high near 86. Light and variable wind.
Tuesday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Wednesday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
Partly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Naples IL
 39.76°N 90.61°W (Elev. 430 ft)
Last Update:
10:36 am CDT Aug 15, 2026
Forecast Valid:
10am CDT Aug 15, 2026-6pm CDT Aug 21, 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