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 >

Hazardous Weather Conditions

Current conditions at

Marshall Memorial Municipal Airport (KMHL)

Lat: 39.1°NLon: 93.2°WElev: 779ft.

Fair

88°F

31°C

Humidity 59%
Wind Speed Calm
Barometer 30.15 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 18 Sep 11:15 am CDT
Extended Forecast for

Boonville MO

  • Today

    Today: Sunny, with a high near 96. Heat index values as high as 105. Light southeast wind.

    High: 96 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 72. Calm wind becoming south around 5 mph after midnight.

    Low: 72 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 96. Heat index values as high as 101. Southwest wind 5 to 8 mph.

    High: 96 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 70. Light and variable wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Mostly Clear
    then Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 87. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 70.

    High: 70 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 96. Heat index values as high as 105. Light southeast wind.
Tonight
Increasing clouds, with a low around 72. Calm wind becoming south around 5 mph after midnight.
Saturday
Partly sunny, with a high near 96. Heat index values as high as 101. Southwest wind 5 to 8 mph.
Saturday Night
A chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 70. Light and variable wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 87. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 57.
Tuesday
Mostly cloudy, with a high near 70.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Partly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Boonville MO
 38.96°N 92.75°W (Elev. 699 ft)
Last Update:
6:01 am CDT Sep 18, 2026
Forecast Valid:
11am CDT Sep 18, 2026-6pm CDT Sep 24, 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