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

St. Joseph, Rosecrans Memorial Airport (KSTJ)

Lat: 39.77° N Lon: 94.91° W Elev: 823 ft.

Fair

73°F

23°C

Humidity 76%
Wind Speed S 6 mph
Barometer 29.89 in (1011.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 19 Sep 5:53 am CDT
Detailed forecast for

Buchanan County

Rest Of Tonight
Partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph.
Saturday
Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent.
Saturday Night
Showers and thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Lows in the mid 60s. Northwest winds 5 to 10 mph. Chance of rain 70 percent.
Sunday
Mostly cloudy with a chance of showers. Not as warm with highs in the mid 70s. North winds 5 to 10 mph. Chance of rain 50 percent.
Sunday Night
Showers likely. Lows around 60. Northeast winds 5 to 10 mph. Chance of rain 70 percent.
Monday
Mostly cloudy. A chance of showers in the morning. Not as warm with highs in the mid 60s. Chance of rain 50 percent.
Monday Night And Tuesday
Mostly cloudy. Lows in the mid 50s. Highs in the mid 60s.
Tuesday Night And Wednesday
Partly cloudy. Lows in the upper 40s. Highs in the upper 60s.
Wednesday Night And Thursday
Mostly cloudy. Lows in the lower 50s. Highs around 70.
Thursday Night
Mostly cloudy. Lows in the upper 50s.
Friday
Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Highs in the lower 70s. Chance of rain 30 percent.



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127 AM CDT Sat Sep 19 2026
 
 

Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database