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

Farmington Airport (KFAM)

Lat: 37.77°NLon: 90.43°WElev: 945ft.

Fair

72°F

22°C

Humidity 79%
Wind Speed Calm
Barometer 30.02 in (1016.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 19 Sep 3:56 am CDT
Extended Forecast for

Flat River MO

Heat Advisory September 19, 04:05am until September 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 19, 04:05am until September 19, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Today

    High: 99 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Southwest wind around 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 5pm. Partly sunny, with a high near 95. West wind 3 to 5 mph.

    High: 95 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 66. North wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 7am. Mostly cloudy, with a high near 83. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny and hot, with a high near 99. Heat index values as high as 102. Southwest wind 3 to 7 mph.
Tonight
Partly cloudy, with a low around 72. Southwest wind around 6 mph.
Sunday
A 20 percent chance of showers after 5pm. Partly sunny, with a high near 95. West wind 3 to 5 mph.
Sunday Night
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 66. North wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%.
Monday
Showers likely, with thunderstorms also possible after 7am. Mostly cloudy, with a high near 83. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 70%.
Monday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 73.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Flat River MO
 37.85°N 90.52°W (Elev. 764 ft)
Last Update:
1:26 am CDT Sep 19, 2026
Forecast Valid:
4am 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