Today | Weather | Sunday, August 9, 2026

Active Weather Warnings

Heat Advisory

Weather in Lee's Summit, Missouri

09:10 AM

Now

79° F

Feels Like 79°

Precipitation 54 %

Wind 15 mph

UV Index (0 - 11+) 1

Humidity 79 %

Today

Day 97°

Night 75°

Precipitation 55 %

Wind 16 mph

UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

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.

Lee's Summit Weather Forecast Updated

21 minutes ago

Last updated on August 09, 2026 at 8:48 AM

Weather Forecast History

Last Year's Weather on This Day (August 9, 2025)

Day

91°

Night

72°

Wind

13 mph

Precipitation

91 %

Air Quality in Lee's Summit

NOW

31 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 4.81 µg/m³

PM₁₀ 5.59 µg/m³

O₃ 0.034 ppm

NO₂ 1.2 ppb

SO₂ 0.3 ppb

CO 0.10 ppm

NH₃ 1.58 µg/m³

NO 0.17 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 – 4.81 µg/m³

PM₁₀ – 5.59 µg/m³

O₃ – 66.61 µg/m³

NO₂ – 2.28 µg/m³

SO₂ – 0.77 µg/m³

CO – 116.66 µg/m³

NH₃ – 1.58 µg/m³

NO – 0.17 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lee's Summit

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 9 at 12:59AM CDT until August 9 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO

Aug 9, 12:00 PM → Aug 9, 8:00 PM

WHAT: Heat index values up to 106 expected.

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

WHEN: From noon today to 8 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: Aug 9, 8:48 AM Source: NWS Alert