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.

Thunderstorm Rain in Vicinity

62°F

17°C

Humidity 93%
Wind Speed NE 8 mph
Barometer 29.82 in
Dewpoint 60°F (16°C)
Visibility 7.00 mi
Last update 21 Jun 9:35 am CDT
Extended Forecast for

5 Miles ESE Plymouth IL

Flood Watch June 22, 12:27pm until June 24, 09:52pm
Flood Watch until June 22, 01:00am
Click here for hazard details and duration
Flood Watch
Flood Watch
  •  
    Flood Watch until June 22, 01:00am

    NOW until 1:00am Mon

    Flood Watch

  • Today

    High: 71 °F

    Heavy Rain

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 3am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 57. North wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Low: 57 °F

    Heavy Rain
    then Slight
    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 75. North wind 9 to 11 mph, with gusts as high as 20 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 78. Light east wind.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81. Calm wind becoming west southwest 5 to 8 mph in the morning.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Today
Showers and thunderstorms, mainly before 4pm. Some of the storms could produce heavy rainfall. High near 71. East wind 13 to 15 mph, with gusts as high as 25 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 3am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 57. North wind 10 to 13 mph, with gusts as high as 22 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 20 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 78. Light east wind.
Tuesday Night
Partly cloudy, with a low around 59. Calm wind.
Wednesday
Mostly sunny, with a high near 81. Calm wind becoming west southwest 5 to 8 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Mostly clear, 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 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ESE Plymouth IL
 40.27°N 90.82°W (Elev. 495 ft)
Last Update:
9:16 am CDT Jun 21, 2026
Forecast Valid:
9am CDT Jun 21, 2026-6pm CDT Jun 27, 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