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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: 1:26 am CDT Aug 7, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 68. Light south southeast wind.
Partly Cloudy

Friday

Friday: Partly sunny, then gradually becoming sunny, with a high near 89. Heat index values as high as 99. South southwest wind 3 to 8 mph.
Becoming
Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 69. South wind around 5 mph becoming calm  in the evening.
Mostly Clear

Saturday

Saturday: Mostly sunny, with a high near 90. Heat index values as high as 102. Light east wind becoming southeast 5 to 10 mph in the morning.
Mostly Sunny

Saturday
Night
Saturday Night: A slight chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 74. Southeast wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 20%.
Partly Cloudy
then Slight
Chance
T-storms
Sunday

Sunday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm.  Mostly sunny, with a high near 94. Chance of precipitation is 20%.
Slight Chance
T-storms then
Slight Chance
Showers
Sunday
Night
Sunday Night: Partly cloudy, with a low around 77.
Partly Cloudy

Monday

Monday: Mostly sunny, with a high near 95.
Mostly Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 76.
Partly Cloudy

Lo 68 °F Hi 89 °F Lo 69 °F Hi 90 °F Lo 74 °F Hi 94 °F Lo 77 °F Hi 95 °F Lo 76 °F

Hazardous Weather Outlook
 

Overnight
 
Partly cloudy, with a low around 68. Light south southeast wind.
Friday
 
Partly sunny, then gradually becoming sunny, with a high near 89. Heat index values as high as 99. South southwest wind 3 to 8 mph.
Friday Night
 
Mostly clear, with a low around 69. South wind around 5 mph becoming calm in the evening.
Saturday
 
Mostly sunny, with a high near 90. Heat index values as high as 102. Light east wind becoming southeast 5 to 10 mph in the morning.
Saturday Night
 
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
 
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 94. Chance of precipitation is 20%.
Sunday Night
 
Partly cloudy, with a low around 77.
Monday
 
Mostly sunny, with a high near 95.
Monday Night
 
Partly cloudy, with a low around 76.
Tuesday
 
Partly sunny, with a high near 93.
Tuesday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Wednesday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 30%.
Wednesday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 50%.
Thursday
 
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Saint Joseph MO.

Weather Forecast Discussion
577
FXUS63 KEAX 070354
AFDEAX

Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
1054 PM CDT Thu Aug 6 2026

.KEY MESSAGES...

- Temperatures are expected to increase through the weekend and
  into Monday.

- Heat indices above 100 degrees are probable for Sunday and
      Monday afternoon.

- Slight chance for showers and thunderstorms over the next few
  days. A few strong storms may be possible.

&&

.DISCUSSION...
Issued at 237 PM CDT Thu Aug 6 2026

Broad mid/upper troughing remains in place over the north
central CONUS, with the stationary surface boundary draped from
NE Missouri into central MO and turning westward south of the KC
metro. Showers and storms have finally exited the CWA to the
east, but overcast skies remain, keeping temperatures in the mid
to upper 70s for most locations as of 3 PM this afternoon.
Robust convection has blossomed across SW Missouri in the
vicinity of Springfield. Can`t completely rule out some
convective development in the far southern or southeastern
portions of the CWA later this afternoon/evening along/ahead of
the stalled boundary, and SPC has these areas within a marginal
risk for severe weather. However, CAM guidance suggests
convective activity should remain south and southeast of our
CWA. Low level jet induced convection is likely to develop
across east central Kansas late tonight, but this should by and
large remain west of our CWA.

Temperatures should heat up tomorrow as we become more under the
influence of the 597 dam H5 high over the Four Corners region.
Another shortwave trough is progged to descend out of Canada and
into the Upper Midwest tomorrow, bringing a cold front north to
south with it, which is likely to trigger convection across
southern Minnesota into northern Iowa by late morning and early
afternoon. It is possible that this convection could grow
upscale into an MCS and could potentially stay together and
reach northern Missouri by tomorrow evening, although CAM
guidance varies significantly at this time. That being said, SPC
is concerned enough about this possibility that is has included
northern MO (along and north of US Highway 36) within a marginal
risk for severe storms for tomorrow.

As we head into the weekend and early next week, the western
ridge continues to exert increased influence over our region,
with temperatures and heat indices on the rise. Heat indices
should approach 100 degrees for southern portions of the CWA on
Saturday, with heat indices flirting with heat advisory criteria
on Sunday and Monday (and perhaps even into Tuesday). Given our
position toward the eastern edge of the primary ridge and
within west northwesterly flow aloft, MCS activity will be
possible, especially on Saturday night/Sunday morning and again
on Tuesday.

&&

.AVIATION /00Z TAFS THROUGH 00Z SATURDAY/...
Issued at 1046 PM CDT Thu Aug 6 2026

VFR conditions should prevail throughout the TAF period. Clear
conditions overnight with calm to light southerly winds could
allow for fog development across northern Missouri and southern
Iowa tonight. Cloud cover is anticipated to build back in early
Friday morning. CIGs are expected to remain VFR, but very brief
drops to MVFR will be possible before returning to FEW/SKC
conditions later in the morning/early afternoon with light
south-southwesterly winds.

&&

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

&&

$$

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






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