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

78°F

26°C

Humidity 54%
Wind Speed S 10 mph
Barometer 29.81 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 15 May 3:35 pm CDT
Extended Forecast for

5 Miles ESE Plymouth IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 82. South wind around 13 mph, with gusts as high as 18 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 64. South wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Mostly Clear
    then Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Cloudy, then gradually becoming mostly sunny, with a high near 83. South southwest wind 6 to 11 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southeast wind 6 to 8 mph, with gusts as high as 17 mph.

    Low: 63 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 89. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 89 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. South wind 15 to 17 mph, with gusts as high as 26 mph.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Partly sunny, with a high near 88. Breezy, with a south wind 16 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Breezy.
    Showers
    Likely then
    T-storms
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 66. Breezy. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 77. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 82. South wind around 13 mph, with gusts as high as 18 mph.
Tonight
A chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 64. South wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Cloudy, then gradually becoming mostly sunny, with a high near 83. South southwest wind 6 to 11 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southeast wind 6 to 8 mph, with gusts as high as 17 mph.
Sunday
Mostly sunny, with a high near 89. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Mostly clear, with a low around 69. South wind 15 to 17 mph, with gusts as high as 26 mph.
Monday
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Partly sunny, with a high near 88. Breezy, with a south wind 16 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 66. Breezy. Chance of precipitation is 70%.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 77. Chance of precipitation is 50%.
Tuesday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 72.
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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:
2:51 pm CDT May 15, 2026
Forecast Valid:
3pm CDT May 15, 2026-6pm CDT May 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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