Today | Weather | Tuesday, June 9, 2026
Active Weather Warnings

Weather in St. Joseph, Missouri

06:48 PM
Now
Cloudy Weather
90° F
Feels Like 97°
Precipitation 6 %
Wind 16 mph
UV Index (0 - 11+) 1
Humidity 66 %
Today
Cloudy Weather
Day 90°
Night 79°
Precipitation 25 %
Wind 9 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

St. Joseph Weather Forecast Updated

47 minutes ago
Last updated on

Air Quality in St. Joseph

NOW
29 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.11 µg/m³
PM10 3.98 µg/m³
O3 0.031 ppm
NO2 0.5 ppb
SO2 0.2 ppb
CO 0.09 ppm
NH3 1.09 µg/m³
NO 0.09 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.53.11 µg/m³
PM103.98 µg/m³
O361.52 µg/m³
NO20.99 µg/m³
SO20.49 µg/m³
CO107.65 µg/m³
NH31.09 µg/m³
NO0.09 µg/m³

Weather Alerts and Warnings for St. Joseph

Moderate Expected Likely

Heat Advisory

Heat Advisory issued June 9 at 4:36PM CDT until June 9 at 10:00PM CDT by NWS Kansas City/Pleasant Hill MO
Jun 9, 4:36 PM Jun 9, 10:00 PM
WHAT: Heat index values up to 105.

WHERE: Portions of northeast Kansas and north central, northwest,
and west central Missouri.

WHEN: Until 10 PM CDT this evening.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Jun 9, 6:00 PM Source: NWS Alert