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St. Joseph, Missouri 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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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: 2:26 am CDT Aug 29, 2026 |
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Today
 Mostly Sunny
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Tonight
 Partly Cloudy
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Sunday
 Slight Chance T-storms then Sunny
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Sunday Night
 Mostly Clear
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Monday
 Hot
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Monday Night
 Mostly Clear
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Tuesday
 Hot
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Tuesday Night
 Mostly Clear
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Wednesday
 Hot
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| Hi 94 °F |
Lo 76 °F |
Hi 98 °F |
Lo 79 °F |
Hi 98 °F |
Lo 79 °F |
Hi 98 °F |
Lo 78 °F |
Hi 98 °F |
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Hazardous Weather Outlook
Today
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Mostly sunny, with a high near 94. South southwest wind around 16 mph, with gusts as high as 26 mph. |
Tonight
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Partly cloudy, with a low around 76. South wind 11 to 13 mph, with gusts as high as 23 mph. |
Sunday
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A slight chance of showers and thunderstorms before 9am. Mostly sunny and hot, with a high near 98. Heat index values as high as 103. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. |
Sunday Night
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Mostly clear, with a low around 79. South wind 11 to 13 mph, with gusts as high as 22 mph. |
Monday
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Mostly sunny and hot, with a high near 98. South southwest wind 10 to 13 mph, with gusts as high as 21 mph. |
Monday Night
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Mostly clear, with a low around 79. |
Tuesday
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Sunny and hot, with a high near 98. |
Tuesday Night
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Mostly clear, with a low around 78. |
Wednesday
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Mostly sunny and hot, with a high near 98. |
Wednesday Night
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Mostly clear, with a low around 76. |
Thursday
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Mostly sunny and hot, with a high near 97. |
Thursday Night
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Partly cloudy, with a low around 75. |
Friday
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Mostly sunny, with a high near 95. |
Forecast from NOAA-NWS
for Saint Joseph MO.
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Weather Forecast Discussion
273
FXUS63 KEAX 291036
AFDEAX
Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
536 AM CDT Sat Aug 29 2026
.KEY MESSAGES...
- Heat will build into the region this weekend and prevail
through the remainder of the forecast. Heat index values will
range from near 100 to 105 Sunday through Friday.
- Low chances for precipitation across northern Missouri
(15-25%) tonight into Sunday morning.
- Next chance for storms Wednesday night into Thursday across
northeast Kansas and northern Missouri (15-25%)
&&
.DISCUSSION...
Issued at 223 AM CDT Sat Aug 29 2026
The main forecast concern this forecast period will be the well
above normal temperatures that being to build into the area today
and are forecast to continue through next week. These above normal
temperatures will come courtesy of a upper level ridge which is
centered over the southwestern CONUS and southern Rockies this
morning. Today this feature will build eastward into the southern
and central Plains providing height rises across the region. This
coupled with modest WAA will drive highs into the upper 80s to mid
90s. Tonight, a upper level shortwave will round the ridge and move
into northern Missouri as a 45-50kt southwesterly LLJ noses into the
area. Despite lacking moisture, a few showers or thunderstorms (15-
25%) will be possible across northern Missouri overnight into
tomorrow morning. Tomorrow the upper level ridge axis builds
directly over the region. This coupled with strong WAA will push
temperatures 10-15 degrees above normal with highs in the mid 90s to
near 100. The upper level ridge will remain in control over the area
through Tuesday with highs remaining in the mid 90s to near 100.
Fortunately, dewpoints in the 60s Sunday through Tuesday will keep
heat index values from being much warmer than the air temperatures
with heat indicies ranging between 95-104.
Tuesday night into Wednesday, a upper level shortwave trough will
move from the central Rockies into the central Plains and into the
Upper Midwest. This will cause the ridge to flatten over the region
as the ridge axis shifts into the southeastern CONUS. This will push
a cold front towards the area Wednesday however highs will still
remain in the mid 90s to near 100. However, better moisture may pool
out ahead of this front driving heat index values into the 100-105
range. Late Wednesday night into Thursday morning, the front may
reach northern Missouri with a nocturnal LLJ focused on that area.
This may allow a few showers and thunderstorms to develop across
northeastern Kansas and northern Missouri (15-25%). Despite the
chance for morning storms, temperatures are still forecast to reach
the mid to upper 90s again on Thursday. By the end of the week, the
local area will be on the western periphery of the upper level ridge
over the southeastern CONUS which may allow shower and thunderstorm
chances to continue Thursday night into Friday (15-25%).
&&
.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 536 AM CDT Sat Aug 29 2026
VFR conds will prevail thru the TAF pd with sct-bkn highs fcst
thru the pd. Winds to begin the TAF pd will be out of the S btn
7-12kts but will incr to nr 15kts with gusts 20-25kts aft
15Z-16Z. Winds will begin to relax btn 23Z-01Z when they will
wkn to 10-15kts while remaining out of the south.
&&
.EAX WATCHES/WARNINGS/ADVISORIES...
MO...None.
KS...None.
&&
$$
DISCUSSION...73
AVIATION...73
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