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St. Joseph, Missouri 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Saint Joseph MO
National Weather Service Forecast for: Saint Joseph MO
Issued by: National Weather Service Kansas City/Pleasant Hill, MO
Updated: 9:37 pm CDT Aug 22, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 63. Light east wind.
Partly Cloudy

Sunday

Sunday: A chance of sprinkles after 4pm.  Partly sunny, with a high near 83. South wind 3 to 6 mph.
Chance
Sprinkles
Sunday
Night
Sunday Night: A chance of rain before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am.  Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Calm wind becoming east southeast around 5 mph after midnight.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Mostly Cloudy
then Chance
Showers
Monday

Monday: A slight chance of showers and thunderstorms before 7am.  Mostly sunny, with a high near 84. Southeast wind 5 to 8 mph.  Chance of precipitation is 10%.
Slight Chance
T-storms then
Mostly Sunny
Monday
Night
Monday Night: Partly cloudy, with a low around 67. East southeast wind 3 to 8 mph.
Partly Cloudy

Tuesday

Tuesday: Partly sunny, with a high near 88.
Partly Sunny

Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Partly Cloudy
then Chance
T-storms
Wednesday

Wednesday: Partly sunny, with a high near 88.
Partly Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 66.
Mostly Clear

Lo 63 °F Hi 83 °F Lo 65 °F Hi 84 °F Lo 67 °F Hi 88 °F Lo 69 °F Hi 88 °F Lo 66 °F

 

Tonight
 
Partly cloudy, with a low around 63. Light east wind.
Sunday
 
A chance of sprinkles after 4pm. Partly sunny, with a high near 83. South wind 3 to 6 mph.
Sunday Night
 
A chance of rain before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Calm wind becoming east southeast around 5 mph after midnight. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
 
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 84. Southeast wind 5 to 8 mph. Chance of precipitation is 10%.
Monday Night
 
Partly cloudy, with a low around 67. East southeast wind 3 to 8 mph.
Tuesday
 
Partly sunny, with a high near 88.
Tuesday Night
 
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Wednesday
 
Partly sunny, with a high near 88.
Wednesday Night
 
Mostly clear, with a low around 66.
Thursday
 
Mostly sunny, with a high near 87.
Thursday Night
 
Mostly clear, with a low around 66.
Friday
 
Mostly sunny, with a high near 86.
Friday Night
 
Partly cloudy, with a low around 69.
Saturday
 
Partly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Saint Joseph MO.

Weather Forecast Discussion
896
FXUS63 KEAX 230420
AFDEAX

Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
1120 PM CDT Sat Aug 22 2026

.KEY MESSAGES...

* Cooler and drier conditions are expected across the region tonight
  into Sunday.

* Weakening showers may try to build into eastern KS Sunday
  afternoon leading increasing clouds and perhaps a sprinkle or two.

* Spotty showers and thunderstorms are expected to spread east
  Sunday night into Monday morning. This activity is not
  expected to be severe.

&&

.DISCUSSION...
Issued at 237 PM CDT Sat Aug 22 2026

Broad 1025 mb surface high pressure has built south from Canada and
is currently centered across the central Dakotas with dew points in
the 40s and 50s to the northwest.  Drier air will filter into the
region this afternoon with high temperatures in the mid 80s.

Surface ridge is expected to shift east tonight leading to good
radiative conditions.  Have forecast lows in the upper 50s to lower
60s across the region. With the good radiative conditions, could see
patchy fog develop in the river valleys and drainage areas, though
increasing high clouds from showers and thunderstorms across the
Northern Plains may limit potential.

Isotropic lift will continue to support the shorts pushing east,
though activity will struggle the farther east it goes with limited
moisture.  Expect the net result to be increasing clouds, and
potentially a few sprinkles across eastern KS.  Have lowered
forecast highs across eastern KS into western MO with increasing
clouds.

Ridge riding short wave is expected to build south along the
Missouri River basin Sunday night. Increasing isentropic lift near
the 310K surface may lead to spotty showers and thunderstorms
overnight.  Mid- level lapse rates are near moist adiabatic so
showers should have limited instability to work with, and dry air
near the surface should limit precip potential.

Warmer, more muggy conditions are expected the first half of next
week as the long standing upper ridge expands east.  A series of
ridge riding short waves building into the Upper Midwest could lead
to additional showers and thunderstorms mid-week.

&&


.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 1120 PM CDT Sat Aug 22 2026

VFR conds will prevail thru the TAF pd at all the TAF sites
with the exception of STJ where fog is expected to develop aft
08Z and cont thru 14Z reducing vis to 4SM with ocnl vis reduced
to 1/4SM btn 10Z-14Z. Otrw...expect incrg high clouds thru 21Z
aft which bkn mid-lvl clouds around 10kft are fcst. A few
decaying showers may approach the TAF sites aft 21Z however
conf is too low for inclusion in the TAF at this time. Winds
thru the TAF pd will be lgt at less than 6kts.


&&

.EAX WATCHES/WARNINGS/ADVISORIES...
MO...None.
KS...None.

&&

$$

DISCUSSION...BT
AVIATION...73
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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