Today | Weather | Tuesday, September 1, 2026

Active Weather Warnings

Weather in Lenexa, Kansas

10:24 AM

Now

86° F

Feels Like 90°

Precipitation 0 %

Wind 9 mph

UV Index (0 - 11+) 4

Humidity 48 %

Today

Day 99°

Night 77°

Precipitation 1 %

Wind 9 mph

UV Index (0 - 11+) 7

Lenexa Weather Forecast Updated

1 minute ago

Last updated on September 01, 2026 at 10:22 AM

Weather Forecast History

Last Year's Weather on This Day (September 1, 2025)

Day

72°

Night

64°

Air Quality in Lenexa

NOW

29 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 6.72 µg/m³

PM₁₀ 7.35 µg/m³

O₃ 0.032 ppm

NO₂ 1.6 ppb

SO₂ 0.5 ppb

CO 0.11 ppm

NH₃ 1.59 µg/m³

NO 0.68 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 – 6.72 µg/m³

PM₁₀ – 7.35 µg/m³

O₃ – 62.24 µg/m³

NO₂ – 2.97 µg/m³

SO₂ – 1.2 µg/m³

CO – 126.37 µg/m³

NH₃ – 1.59 µg/m³

NO – 0.68 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lenexa

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 1 at 4:03AM CDT until September 4 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO

Sep 1, 4:03 AM → Sep 4, 8:00 PM

WHAT: Heat index values up to 105.

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

WHEN: Until 8 PM CDT Friday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

ADDITIONAL DETAILS: While heat index values may not reach 105 each
day, the combination of the longevity of the heat and little or
limited relief during overnight periods have prompted the multi-day
Heat Advisory.

+ Read More

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Updated: Sep 1, 10:22 AM Source: NWS Alert

Air Quality Alert

Air Quality Alert issued August 31 at 6:17PM CDT by NWS Kansas City/Pleasant Hill MO

Aug 31, 6:17 PM → Sep 1, 7:00 PM

The Mid-America Regional Council has issued a code Orange Air
Quality Alert for the Kansas City metropolitan area, with ground
level ozone being the primary pollutant from 9 AM to 7 PM CDT
Tuesday.

Members of sensitive groups may experience health effects.

People and businesses are urged to avoid activities which lead to
ozone formation. These activities include refueling vehicles or
topping off when refueling idling vehicles unnecessarily and using
gasoline powered lawn equipment. Positive activities include car
pooling, biking to work, delaying or combining errands, and using
water-based paints and cleaners.

When pollution levels are elevated, the Mid-America Regional Council
recommends that individuals consider limiting strenuous outdoor
physical activity to reduce the risk of adverse health effects.
People who may be especially sensitive to the effects of elevated
levels of pollutants include the very young and those with
preexisting respiratory problems such as asthma or heart disease.
Those with symptoms should consider consulting their personal
physician.

For further information, please see the Mid-America Regional Council
air quality program website at http://www.airqkc.org.