U.S. Alerts
El Dorado Weather Logo
U.S. Radar Loop Conditions Map

U.S. Color Topo IR Sat North America Color Background Satellite Thumb
Interactive Wx Map Live U.S. Google Map Radar Thumbnail Image

US Precipitation 1 day, 24 hour precipitation map

US Temperatures US Conditions Map

US Climate Data US Conditions Map

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: 5:51 pm CDT Aug 20, 2026
 
Tonight

Tonight: Mostly clear, with a low around 66. East southeast wind around 5 mph becoming calm  in the evening.
Mostly Clear

Friday

Friday: Mostly sunny, with a high near 89. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Mostly Sunny

Friday
Night
Friday Night: A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 2am.  Partly cloudy, with a low around 69. Northwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 20%.
Slight Chance
Showers then
Slight Chance
T-storms
Saturday

Saturday: A slight chance of showers and thunderstorms before 1pm.  Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming north northeast around 6 mph in the afternoon.  Chance of precipitation is 20%.
Slight Chance
T-storms

Saturday
Night
Saturday Night: Mostly clear, with a low around 64. Northeast wind around 6 mph becoming calm  in the evening.
Mostly Clear

Sunday

Sunday: Partly sunny, with a high near 81.
Partly Sunny

Sunday
Night
Sunday Night: A chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Mostly Cloudy
then Chance
T-storms
Monday

Monday: Partly sunny, with a high near 84.
Partly Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 67.
Partly Cloudy

Lo 66 °F Hi 89 °F Lo 69 °F Hi 86 °F Lo 64 °F Hi 81 °F Lo 65 °F Hi 84 °F Lo 67 °F

 

Tonight
 
Mostly clear, with a low around 66. East southeast wind around 5 mph becoming calm in the evening.
Friday
 
Mostly sunny, with a high near 89. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Friday Night
 
A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 2am. Partly cloudy, with a low around 69. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
 
A slight chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming north northeast around 6 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
 
Mostly clear, with a low around 64. Northeast wind around 6 mph becoming calm in the evening.
Sunday
 
Partly sunny, with a high near 81.
Sunday Night
 
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Monday
 
Partly sunny, with a high near 84.
Monday Night
 
Partly cloudy, with a low around 67.
Tuesday
 
Partly sunny, with a high near 88.
Tuesday Night
 
A chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Wednesday
 
Partly sunny, with a high near 87.
Wednesday Night
 
Partly cloudy, with a low around 66.
Thursday
 
Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Saint Joseph MO.

Weather Forecast Discussion
291
FXUS63 KEAX 202330
AFDEAX

Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
630 PM CDT Thu Aug 20 2026

.KEY MESSAGES...

* Chance of storms building into the region Friday afternoon/evening
  from the north/northwest.

* Cooler and drier conditions through the weekend.

* Unsettled weather next week leading to periodic storm chances.

&&

.DISCUSSION...
Issued at 316 PM CDT Thu Aug 20 2026

Broad high pressure across the Upper Midwest centered near the Quad
Cities as of 18Z is expected to slowly shift towards the Tennessee
Valley. Weak return flow is expected to develop overnight, and could
see a few elevated storms develop in eastern Kansas/ southern
Nebraska overnight. This activity is expected to remain largely west
and north of the forecast area tonight, but may try to build south
during the day Friday within the northwest flow aloft.  With that
said, the cap increases in strength the further south you go, making
it increasingly difficult to get convection.  Models are highly
variable in the potential for thunderstorms tomorrow
afternoon/evening, and therefore SPC has expanded the day two
marginal across much of the area.

Shortwave embedded in northwest flow aloft located in northern
Minnesota is expected to build southeast tonight into tomorrow
towards the western Great Lakes region.  This could lead to late day
storm developing across eastern Iowa along cold front building
south. If this activity is able to develop south and west a, there
is the low potential for thunderstorms across north central
Missouri.

Light flow is expected tomorrow night into Saturday morning.  With
lack of large scale forcing across the region, it will likely be
difficult to get storms to form directly in eastern KS into northern-
central Missouri, but weak low level warm air advection across
central Nebraska into central Kansas may lead to additional storms
that may try to work into the region under the northwest flow aloft.

Upper ridge across the western US stregthens with long standing
trough across the eastern US through the weekend. Canadian high
pressure attempts to squeeze south across the central US keeping the
forecast dry and cooler than normal temperatures through the
weekend. Ridge across the west expands east but northwest flow aloft
remains leading to periodic chances of precipitation next week.

&&

.AVIATION /00Z TAFS THROUGH 00Z SATURDAY/...
Issued at 629 PM CDT Thu Aug 20 2026

VFR prevailing through the remainder of the afternoon/evening at
all terminals. Winds look to remain light/variable through the
period, with indication of winds turning out of the south
towards the northwest by tomorrow afternoon. Favorable
conditions for fog development overnight under light/variable
winds and decent low-level moisture, but with building cloud
cover overnight, confidence is not high enough at downtown
terminals to include mentions of BR/FG in this TAF issuance.
Low-lying areas, such as KSTJ, may still experience dense fog
from 9-14z. Additionally, model guidance indicates the potential
for SHRA/TSRA near the end of the forecast period. However,
with continued uncertainty with these solutions, have left out
mentions of weather at this time.

&&

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

&&

$$

DISCUSSION...BT
AVIATION...SPG
View a Different U.S. Forecast Discussion Location
(In alphabetical order by state)



Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






Contact Us Contact Us Thumbnail | Mobile Mobile Phone Thumbnail
Private Policy | Terms & Conds | Consent Preferences | Cookie Policy
Never base any life decisions on weather information from this site or anywhere over the Internet.
Site is dedicated to our Lord & Savior Jesus Christ | Random Quotes of Jesus

Copyright © 2026 El Dorado Weather, Inc. | Site Designed By:  Webmaster Danny