Today | Weather | Monday, June 29, 2026

Active Weather Warnings

Weather in St. Joseph, Missouri

08:02 PM

Now

90° F

Feels Like 97°

Precipitation 7 %

Wind 16 mph

UV Index (0 - 11+) 0

Humidity 64 %

Today

Day 91°

Night 79°

Precipitation 25 %

Wind 20 mph

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

St. Joseph Weather Forecast Updated

Last updated on June 29, 2026 at 6:44 PM

Air Quality in St. Joseph

NOW

31 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.58 µg/m³

PM₁₀ 5.8 µg/m³

O₃ 0.033 ppm

NO₂ 0.6 ppb

SO₂ 0.3 ppb

CO 0.09 ppm

NH₃ 1.13 µg/m³

NO 0.05 µg/m³

PM_2.5 – 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)

PM_2.5 – 3.58 µg/m³

PM₁₀ – 5.8 µg/m³

O₃ – 65.74 µg/m³

NO₂ – 1.1 µg/m³

SO₂ – 0.69 µg/m³

CO – 103.62 µg/m³

NH₃ – 1.13 µg/m³

NO – 0.05 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for St. Joseph

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued June 27 at 7:40AM CDT until June 30 at 9:00PM CDT by NWS Kansas City/Pleasant Hill MO

Jun 28, 1:00 PM → Jun 30, 9:00 PM

WHAT: For the Dense Fog Advisory, visibility less than half a mile
in dense fog. For the Extreme Heat Watch, dangerously hot
conditions with heat index values up to 106 possible.

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

WHEN: For the Dense Fog Advisory, until 10 AM CDT this morning.
For the Extreme Heat Watch, from Sunday afternoon through Tuesday
evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events. Low visibility could make
driving conditions hazardous.

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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Updated: Jun 27, 11:48 AM Source: NWS Alert

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued June 29 at 2:05PM CDT until July 3 at 9:00PM CDT by NWS Kansas City/Pleasant Hill MO

Jun 29, 2:05 PM → Jul 3, 9:00 PM

WHAT: Dangerously hot conditions with heat index values up to
105-110F expected.

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

WHEN: Until 9 PM CDT Friday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

ADDITIONAL DETAILS: Several days of extreme heat will impact the
region with poor heat relief during the overnight hours.