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

Hazardous Weather Conditions

Current conditions at

Mount Sterling, Mount Sterling Municipal Airport (KI63)

Lat: 39.99°NLon: 90.8°WElev: 732ft.

Fair

74°F

23°C

Humidity 85%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 4 Aug 11:15 pm CDT
Extended Forecast for

Frederick IL

  • Tonight

    Tonight: Partly cloudy, with a low around 69. Light south wind.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 85. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Slight Chance
    Showers then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5am. Low around 67. Light and variable wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 11am, then a chance of showers between 11am and 1pm. Mostly cloudy, with a high near 81. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 85. Calm wind.

    High: 85 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 69. Light south wind.
Wednesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 85. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5am. Low around 67. Light and variable wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers likely and possibly a thunderstorm before 11am, then a chance of showers between 11am and 1pm. Mostly cloudy, with a high near 81. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 66. Calm wind.
Friday
Partly sunny, with a high near 85. Calm wind.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68. Calm wind.
Saturday
Sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 73.
Monday
Mostly sunny, with a high near 92.
Monday Night
A chance of showers. Partly cloudy, with a low around 72.
Tuesday
Mostly sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Frederick IL
 40.06°N 90.43°W (Elev. 440 ft)
Last Update:
11:31 pm CDT Aug 4, 2026
Forecast Valid:
11pm CDT Aug 4, 2026-6pm CDT Aug 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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