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

Fire Weather Concerns and Severe Weather

Dry and breezy conditions will bring elevated to critical fire weather conditions across portions of the northern and central High Plains through this weekend, where fuels remain largely receptive. Severe thunderstorms and heavy rainfall are possible from the Plains into the Upper Midwest, as well as in the Ohio Valley and portions of the Mid-Atlantic through this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

St. Joseph, Rosecrans Memorial Airport (KSTJ)

Lat: 39.77°NLon: 94.91°WElev: 823ft.

Fair

69°F

21°C

Humidity 84%
Wind Speed S 7 mph
Barometer 29.82 in (1009.0 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 11 Sep 10:53 pm CDT
Extended Forecast for

Union Star MO

  • Tonight

    Tonight: Partly cloudy, with a low around 65. Light and variable wind becoming south around 6 mph after midnight.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny, with a high near 84. Southwest wind 5 to 11 mph becoming north northeast in the afternoon. Chance of precipitation is 20%.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 62. Northeast wind 5 to 7 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers and thunderstorms likely before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 77. East wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87. Breezy. Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. Chance of precipitation is 40%.

    Low: 70 °F

    Mostly Clear
    then Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.

    High: 81 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 61. Chance of precipitation is 90%.

    Low: 61 °F

    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 65. Light and variable wind becoming south around 6 mph after midnight.
Saturday
A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny, with a high near 84. Southwest wind 5 to 11 mph becoming north northeast in the afternoon. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 62. Northeast wind 5 to 7 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms likely before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 77. East wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87. Breezy. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. Chance of precipitation is 40%.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 61. Chance of precipitation is 90%.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Thursday
A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Friday
A chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Union Star MO
 39.99°N 94.6°W (Elev. 958 ft)
Last Update:
10:31 pm CDT Sep 11, 2026
Forecast Valid:
10pm CDT Sep 11, 2026-6pm CDT Sep 18, 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