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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: 2:47 am CDT Aug 19, 2026
 
Overnight

Overnight: A slight chance of showers and thunderstorms.  Mostly cloudy, with a low around 68. Light east wind.  Chance of precipitation is 20%.
Slight Chance
T-storms

Wednesday

Wednesday: Showers and thunderstorms likely, mainly before 2pm.  Partly sunny, with a high near 83. Calm wind becoming northeast around 6 mph in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Chance
T-storms
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before 7pm.  Partly cloudy, with a low around 66. North northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Partly Cloudy
Thursday

Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 85. Light east northeast wind.
Becoming
Sunny

Thursday
Night
Thursday Night: Mostly clear, with a low around 68. Calm wind.
Mostly Clear

Friday

Friday: A slight chance of showers and thunderstorms after 1pm.  Sunny, with a high near 89. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
Friday
Night
Friday Night: A chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 69. Chance of precipitation is 40%.
Mostly Clear
then Chance
T-storms
Saturday

Saturday: Mostly sunny, with a high near 88.
Mostly Sunny

Saturday
Night
Saturday Night: Mostly clear, with a low around 67.
Mostly Clear

Lo 68 °F Hi 83 °F Lo 66 °F Hi 85 °F Lo 68 °F Hi 89 °F Lo 69 °F Hi 88 °F Lo 67 °F

Hazardous Weather Outlook
 

Overnight
 
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Light east wind. Chance of precipitation is 20%.
Wednesday
 
Showers and thunderstorms likely, mainly before 2pm. Partly sunny, with a high near 83. Calm wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 66. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
 
Mostly cloudy through mid morning, then gradual clearing, with a high near 85. Light east northeast wind.
Thursday Night
 
Mostly clear, with a low around 68. Calm wind.
Friday
 
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 89. Chance of precipitation is 20%.
Friday Night
 
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Chance of precipitation is 40%.
Saturday
 
Mostly sunny, with a high near 88.
Saturday Night
 
Mostly clear, with a low around 67.
Sunday
 
A chance of showers before 1pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Sunday Night
 
Mostly cloudy, with a low around 68.
Monday
 
Partly sunny, with a high near 87.
Monday Night
 
Partly cloudy, with a low around 69.
Tuesday
 
Partly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Saint Joseph MO.

Weather Forecast Discussion
933
FXUS63 KEAX 190719
AFDEAX

Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
219 AM CDT Wed Aug 19 2026

.KEY MESSAGES...

- Showers and thunderstorms continue through the morning hours.
  Damaging winds, hail, and heavy rainfall continues.

- Additional showers and thunderstorms are possible this
  afternoon and evening primarily across northern MO.

- Temperatures gradually warm through the week with more hot
  and humid conditions possible next week. Additional storm
  chances are possible through this week.

&&

.DISCUSSION...
Issued at 217 AM CDT Wed Aug 19 2026

Showers and thunderstorms continue along a diffuse warm frontal
boundary stretching from Oskaloosa, KS southeast through Pilot
Grove, MO. Upper level instability and ample DCAPE still promote an
environment for storms with damaging winds and some hail. As of
writing, storms are progressing just enough to mitigate most
flooding concerns. There is still some concern for hydrological
impacts as radar QPE show around 1.5 to 2 inches of rainfall across
portions of Atchison (KS) and Leavenworth counties progress eastward
into the KC metro. Storms continue to gradually sink southward with
showers and thunderstorms lingering through the morning hours;
ending by midday.

Upper level flow pivots to the northwest which help usher a mid
level shortwave southward. This brings additional opportunities for
showers and thunderstorms later this afternoon into the evening
hours primarily for areas north of the MO River. Ample instability
and shear do present a marginal opportunity for a strong to severe
storm; however, we will have a much better idea once this current
complex roles through. Another cooler airmass moves in behind this
front but all it does is delay the warming trend that arrives later
this week as broadscale ridging begins to slowly build into the
central CONUS. The center of this ridge stalls across the Rockies
putting our CWA in the NW flow of the eastern hemisphere of the
synoptic ridge. This opens up flow to allow multiple shortwaves to
pass over the region presenting further opportunities for
precipitation later in the week. Long term guidance slowly slides
this high to the east suggesting the potential for another stretch
of hot and humid conditions next week.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 1242 AM CDT Wed Aug 19 2026

RA and TSRA continues for the next couple of hours across the
terminals. Gusty winds across the south side of these storms
continue affecting IXD. Additional development behind the
initial line of storms keeps RA/TSRA around through much of the
overnight. VFR conditions return during the morning and look to
persist through much of the day. Additional TSRA is possible
north of the MO River during the late afternoon/early evening;
however, some uncertainties remain with RA forecast. Winds
become light and variable after sunset.

&&

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

&&

$$

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






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