Current conditions at

Mount Sterling, Mount Sterling Municipal Airport (KI63)

Lat: 39.99°NLon: 90.8°WElev: 732ft.

Thunderstorm Heavy Rain

60°F

16°C

Humidity 97%
Wind Speed E 12 mph
Barometer 29.83 in
Dewpoint 59°F (15°C)
Visibility 2.00 mi
Last update 21 Jun 10:55 am CDT
Extended Forecast for

Frederick IL

Flood Warning until further notice
Flood Watch until June 22, 01:00am
Click here for hazard details and duration
Flood Warning until further notice
Flood Watch
  •  
    Flood Warning until further notice
    Flood Watch until June 22, 01:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Today

    High: 73 °F

    Heavy Rain

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Some of the storms could produce heavy rainfall.  Mostly cloudy, with a low around 57. North northeast wind 10 to 13 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.

    Low: 57 °F

    Heavy Rain
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 75. North wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 75 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 56. North northeast wind around 5 mph becoming calm  in the evening.

    Low: 56 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 79. Light east northeast wind.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Today
Showers and thunderstorms, mainly before 4pm. Some of the storms could produce heavy rainfall. High near 73. East wind 11 to 14 mph becoming south in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 57. North northeast wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 75. North wind 9 to 11 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 56. North northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 79. Light east northeast wind.
Tuesday Night
Mostly clear, with a low around 59. Calm wind.
Wednesday
Mostly sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 59.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Frederick IL
 40.06°N 90.45°W (Elev. 466 ft)
9:16 am CDT Jun 21, 2026
11am CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
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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