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

St. Joseph, Rosecrans Memorial Airport (KSTJ)

Lat: 39.77°NLon: 94.91°WElev: 823ft.

Fog/Mist

70°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 30.14 in (1019.9 mb)
Dewpoint 70°F (21°C)
Visibility 0.75 mi
Last update 17 Sep 2:53 am CDT
Extended Forecast for

Saint Joseph MO

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 70. Light south southwest wind.

    Low: 70 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 87. Heat index values as high as 96. Calm wind.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 70. East wind 3 to 6 mph.

    Low: 70 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 90. Heat index values as high as 99. Southeast wind 6 to 11 mph becoming south southwest in the afternoon. Winds could gust as high as 18 mph.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, with thunderstorms also possible after 7pm. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 74. Chance of precipitation is 80%.

    High: 74 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 62. Chance of precipitation is 70%.

    Low: 62 °F

    Showers
    Likely

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 70. Light south southwest wind.
Thursday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 87. Heat index values as high as 96. Calm wind.
Thursday Night
Partly cloudy, with a low around 70. East wind 3 to 6 mph.
Friday
Sunny, with a high near 90. Heat index values as high as 99. Southeast wind 6 to 11 mph becoming south southwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Saturday Night
Showers likely, with thunderstorms also possible after 7pm. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Sunday
A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 74. Chance of precipitation is 80%.
Sunday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 62. Chance of precipitation is 70%.
Monday
A chance of showers before 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 57.
Tuesday
Partly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Partly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Joseph MO
 39.77°N 94.83°W (Elev. 968 ft)
Last Update:
3:01 am CDT Sep 17, 2026
Forecast Valid:
3am CDT Sep 17, 2026-6pm CDT Sep 23, 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