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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: 10:36 pm CDT Aug 23, 2026 |
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Overnight
 Slight Chance Showers
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Monday
 Decreasing Clouds
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Monday Night
 Partly Cloudy
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Tuesday
 Mostly Sunny
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Tuesday Night
 Slight Chance Showers then Slight Chance T-storms
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Wednesday
 Mostly Sunny
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Wednesday Night
 Mostly Clear
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Thursday
 Mostly Sunny
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Thursday Night
 Mostly Clear
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| Lo 64 °F |
Hi 83 °F |
Lo 66 °F |
Hi 86 °F |
Lo 69 °F |
Hi 89 °F |
Lo 64 °F |
Hi 86 °F |
Lo 65 °F |
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Overnight
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A slight chance of showers before 1am. Mostly cloudy, with a low around 64. Light east southeast wind. Chance of precipitation is 20%. |
Monday
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Mostly cloudy, then gradually becoming sunny, with a high near 83. East southeast wind 5 to 8 mph. |
Monday Night
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Partly cloudy, with a low around 66. East wind 3 to 8 mph. |
Tuesday
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Mostly sunny, with a high near 86. Light east southeast wind. |
Tuesday Night
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A slight chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 20%. |
Wednesday
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Mostly sunny, with a high near 89. |
Wednesday Night
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Mostly clear, with a low around 64. |
Thursday
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Mostly sunny, with a high near 86. |
Thursday Night
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Mostly clear, with a low around 65. |
Friday
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Mostly sunny, with a high near 86. |
Friday Night
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A chance of showers. Partly cloudy, with a low around 69. Chance of precipitation is 30%. |
Saturday
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A chance of showers. Partly sunny, with a high near 89. Chance of precipitation is 30%. |
Saturday Night
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A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 40%. |
Sunday
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A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 30%. |
Forecast from NOAA-NWS
for Saint Joseph MO.
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Weather Forecast Discussion
120
FXUS63 KEAX 240357
AFDEAX
Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
1057 PM CDT Sun Aug 23 2026
...06z Aviation Update...
.KEY MESSAGES...
* Showers with a few embedded lightning strikes expected tonight
mainly west of a line from Lamoni- Moberly MO. Rainfall amounts
are expected to be light totaling less than 0.25".
* Temperatures warm to mid week ahead of a cold front moving through
the region.
* Breezy southerly winds expected next weekend, with the potential
of showers and thunderstorms.
&&
.DISCUSSION...
Issued at 222 PM CDT Sun Aug 23 2026
Isentropic lift on the 305-310K surfaces is leading to weak shower
activity building into the area from Nebraska and eastern KS. Very
dry air in the subcloud layer (nearly 10K feet) is going to limit
what reaches the ground, but could see a few sprinkles along the
Missouri/KS state late through the afternoon into the early evening
hours.
Towards midnight, low level warm air/moisture advection leads to
weak instability and could see spotty scattered showers develop.
Instability remains quite weak with moist adiabatic lapse rates aloft,
but still should be able to support weak showers with an embedded
lightning strike here and there. 06Z NAM NEST hinted at the
potential for heavy rainfall with this activity overnight, but
successive model runs have contained precipitable water values to
~1.5" (which is near normal for this time of year). Expect
accumulating precip to largely be west of a line from Lamoni Iowa to
Moberly MO with surface high to the east limiting eastward extent of
the precipitation shield.
Low level warm air advection weakens after 12Z Monday and expect
shower activity to weaken and shift southeast with time as short
wave builds east. Partial clearing should allow for a decent
temperature recovery on Monday, and even warmer conditions Tuesday
into Wednesday as upper ridge across the west expands east.
Ridge riding shortwave is expected to build into the Upper Midwest
Wednesday, with trailing cold front moving through the region
Wednesday morning. Could see a few showers and storms with the
frontal passage, but timing may limit coverage.
Surface ridge moves through the region on Thursday with stronger
return flow Friday into next weekend. With the gulf wide open,
ample moisture in place for showers and thunderstorms.
&&
.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
Issued at 1036 PM CDT Sun Aug 23 2026
VFR conditions anticipated to prevail across the terminals
through the period. Only notable change vs previous (00z)
issuance is the removal of PROB30 showers at KSTJ with more
recent guidance suggesting lesser chances. Otherwise, hi-
res/CAM guidance continues to keep majority of overnight/morning scattered
shower/storm activity to the W/SW of the terminals, allowing
mentions to remain out of the TAFs. KC Metro terminals have seen
winds organize more out of the E, while KSTJ remains light and
variable at this time, but too will join the E/ESE prevailing
direction overnight. Daytime sustained winds may approach 10kts,
but remains out of the E to ESE.
&&
.EAX WATCHES/WARNINGS/ADVISORIES...
MO...None.
KS...None.
&&
$$
DISCUSSION...BT
SHORT TERM...
LONG TERM...
AVIATION...Curtis
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