Today | Weather | Thursday, September 3, 2026
Active Weather Warnings

Weather in Des Moines, Iowa

05:16 PM
Now
Cloudy Weather
93° F
Feels Like 99°
Precipitation 32 %
Wind 13 mph
UV Index (0 - 11+) 2
Humidity 46 %
Today
Sunny with a Chance of Thunderstorms
Day 97°
Night 75°
Precipitation 49 %
Wind 8 mph
UV Index (0 - 11+) 6

Des Moines Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 3, 2025)
Cloudy Night

Day

81°

Night

46°

Wind

6 mph

Precipitation

4 %

Air Quality in Des Moines

NOW
42 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.5 µg/m³
PM10 2.78 µg/m³
O3 0.046 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.08 ppm
NH3 0.43 µg/m³
NO 0.08 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)
PM2.52.5 µg/m³
PM102.78 µg/m³
O389.95 µg/m³
NO20.52 µg/m³
SO20.58 µg/m³
CO96.2 µg/m³
NH30.43 µg/m³
NO0.08 µg/m³

Weather Alerts and Warnings for Des Moines

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 3 at 1:38PM CDT until September 5 at 7:00PM CDT by NWS Des Moines IA
Sep 3, 1:38 PM Sep 5, 7:00 PM
WHAT: Heat index values up to 105.

WHERE: Portions of central and southern Iowa.

WHEN: Until 7 PM CDT Saturday.

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

ADDITIONAL DETAILS: While heat index values may not reach 105
degrees each day, the combination of the longevity of the heat and
little or limited relief during the overnight periods with warm
lows have prompted the multi-day Heat Advisory.
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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. 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, 3:55 PM Source: NWS Alert