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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Quincy Regional Airport-Baldwin Field (KUIN)

Lat: 39.94°NLon: 91.2°WElev: 759ft.

Fair

76°F

24°C

Humidity 88%
Wind Speed S 7 mph
Barometer 29.95 in (1013.4 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 19 Sep 1:54 am CDT
Extended Forecast for

Mount Sterling IL

  • Overnight

    Overnight: Mostly clear, with a low around 71. South wind around 7 mph.

    Low: 71 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly cloudy, with a high near 91. South wind 5 to 8 mph.

    High: 91 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. Calm wind becoming southwest around 5 mph.

    Low: 69 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm. High near 78. Calm wind becoming north 5 to 8 mph in the morning. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 61. Northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 61 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 70%.

    High: 66 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 63.

    High: 63 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 71. South wind around 7 mph.
Saturday
Mostly cloudy, with a high near 91. South wind 5 to 8 mph.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. Calm wind becoming southwest around 5 mph.
Sunday
Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm. High near 78. Calm wind becoming north 5 to 8 mph in the morning. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 61. Northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Monday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 70%.
Monday Night
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 55.
Tuesday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 67.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Sterling IL
 39.98°N 90.77°W (Elev. 709 ft)
Last Update:
1:26 am CDT Sep 19, 2026
Forecast Valid:
2am CDT Sep 19, 2026-6pm CDT Sep 25, 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