Today | Weather | Saturday, September 5, 2026
Active Weather Warnings

Weather in Lee's Summit, Missouri

06:36 PM
Now
Cloudy Weather
97° F
Feels Like 99°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 0
Humidity 40 %
Today
Cloudy Weather
Day 100°
Night 75°
Precipitation 1 %
Wind 5 mph
UV Index (0 - 11+) 7

Lee's Summit Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 5, 2025)
Cloudy Night

Day

66°

Night

52°

Wind

6 mph

Precipitation

1 %

Air Quality in Lee's Summit

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.58 µg/m³
PM10 2.99 µg/m³
O3 0.033 ppm
NO2 1.4 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 1.75 µg/m³
NO 0.16 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)
PM2.52.58 µg/m³
PM102.99 µg/m³
O364.66 µg/m³
NO22.66 µg/m³
SO20.25 µg/m³
CO106.9 µg/m³
NH31.75 µg/m³
NO0.16 µg/m³

Weather Alerts and Warnings for Lee's Summit

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued September 5 at 1:03PM CDT until September 8 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO
Sep 5, 1:03 PM Sep 8, 8:00 PM
WHAT: Dangerously hot and prolonged conditions with heat index
values up to 105.

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

WHEN: Until 8 PM CDT Tuesday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Updated: Sep 5, 5:06 PM Source: NWS Alert
Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 3 at 5:32AM CDT until September 5 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO
Sep 3, 5:32 AM Sep 5, 8:00 PM
WHAT: Heat index values up to 107.

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

WHEN: Until 8 PM CDT Saturday.

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 3, 10:37 AM Source: NWS Alert