Today | Weather | Monday, September 21, 2026

Weather in Lenexa, Kansas

12:53 PM
Now
Cloudy Weather
72° F
Feels Like 72°
Precipitation 47 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 81 %
Today
Cloudy Weather
Day 73°
Night 61°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 2

Lenexa Weather Forecast Updated

27 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)

Day

81°

Night

63°

Air Quality in Lenexa

NOW
23 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.99 µg/m³
PM10 3.1 µg/m³
O3 0.025 ppm
NO2 0.9 ppb
SO2 0.5 ppb
CO 0.15 ppm
NH3 0.27 µg/m³
NO 0.25 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)
PM2.52.99 µg/m³
PM103.1 µg/m³
O349.16 µg/m³
NO21.61 µg/m³
SO21.24 µg/m³
CO174.26 µg/m³
NH30.27 µg/m³
NO0.25 µg/m³