Today | Weather | Wednesday, August 12, 2026

Active Weather Warnings

Extreme Heat Warning

Weather in Lenexa, Kansas

06:48 AM

Now

79° F

Feels Like 79°

Precipitation 2 %

Wind 11 mph

UV Index (0 - 11+) 1

Humidity 70 %

Today

Day 97°

Night 77°

Precipitation 55 %

Wind 12 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.

Lenexa Weather Forecast Updated

4 minutes ago

Last updated on August 12, 2026 at 6:44 AM

Weather Forecast History

Last Year's Weather on This Day (August 12, 2025)

Day

86°

Night

66°

Air Quality in Lenexa

NOW

27 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2.23 µg/m³

PM₁₀ 2.87 µg/m³

O₃ 0.029 ppm

NO₂ 1.3 ppb

SO₂ 0.3 ppb

CO 0.09 ppm

NH₃ 1.66 µg/m³

NO 0 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 – 2.23 µg/m³

PM₁₀ – 2.87 µg/m³

O₃ – 56.37 µg/m³

NO₂ – 2.38 µg/m³

SO₂ – 0.78 µg/m³

CO – 100.81 µg/m³

NH₃ – 1.66 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lenexa

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued August 12 at 3:27AM CDT until August 14 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO

Aug 12, 3:27 AM → Aug 14, 8:00 PM

WHAT: Dangerously hot conditions with heat index values up to 110.

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

WHEN: Until 8 PM CDT Friday.

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

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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.

Updated: Aug 12, 6:44 AM Source: NWS Alert