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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

Jefferson City, Jefferson City Memorial Airport (KJEF)

Lat: 38.59°NLon: 92.16°WElev: 548ft.

Fair

76°F

24°C

Humidity 88%
Wind Speed Calm
Barometer 30.20 in (1021.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 16 Sep 10:53 pm CDT
Extended Forecast for

Saint Thomas MO

Heat Advisory September 16, 11:29pm until September 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 16, 11:29pm until September 19, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 96. Heat index values as high as 103. South wind 5 to 7 mph becoming west in the afternoon.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. Light south wind.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 96. Calm wind becoming southwest around 5 mph.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. Light south wind.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers. Partly sunny, with a high near 91.

    High: 91 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 74. South wind around 6 mph.
Thursday
Sunny, with a high near 96. Heat index values as high as 103. South wind 5 to 7 mph becoming west in the afternoon.
Thursday Night
Mostly clear, with a low around 72. Light south wind.
Friday
Sunny, with a high near 96. Calm wind becoming southwest around 5 mph.
Friday Night
Mostly clear, with a low around 73. Light south wind.
Saturday
Mostly sunny, with a high near 95.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 91.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 83.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 64.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Thomas MO
 38.37°N 92.23°W (Elev. 699 ft)
Last Update:
10:46 pm CDT Sep 16, 2026
Forecast Valid:
11pm CDT Sep 16, 2026-6pm CDT Sep 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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