Today | Weather | Monday, July 20, 2026

Active Weather Warnings

Weather in Des Moines, Iowa

07:44 PM

Now

90° F

Feels Like 93°

Precipitation 40 %

Wind 10 mph

UV Index (0 - 11+) 0

Humidity 57 %

Today

Day 99°

Night 70°

Precipitation 55 %

Wind 12 mph

UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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.

Des Moines Weather Forecast Updated

Last updated on July 20, 2026 at 6:28 PM

Weather Forecast History

Last Year's Weather on This Day (July 20, 2025)

Day

88°

Night

72°

Wind

8 mph

Precipitation

98 %

Air Quality in Des Moines

NOW

32 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.46 µg/m³

PM₁₀ 3.84 µg/m³

O₃ 0.034 ppm

NO₂ 0.6 ppb

SO₂ 0.2 ppb

CO 0.09 ppm

NH₃ 1.13 µg/m³

NO 0.05 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 – 3.46 µg/m³

PM₁₀ – 3.84 µg/m³

O₃ – 67.49 µg/m³

NO₂ – 1.08 µg/m³

SO₂ – 0.53 µg/m³

CO – 102.49 µg/m³

NH₃ – 1.13 µg/m³

NO – 0.05 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Des Moines

Extreme Future Possible

Tornado Watch

Tornado Watch issued July 20 at 6:17PM CDT until July 20 at 10:00PM CDT by NWS Des Moines IA

Jul 20, 6:17 PM → Jul 20, 10:00 PM

TORNADO WATCH 500 REMAINS VALID UNTIL 10 PM CDT THIS EVENING FOR
THE FOLLOWING AREAS

IN IOWA THIS WATCH INCLUDES 19 COUNTIES

IN CENTRAL IOWA

BOONE DALLAS GRUNDY
HAMILTON HARDIN JASPER
MARSHALL POLK POWESHIEK
STORY TAMA WEBSTER

IN SOUTH CENTRAL IOWA

MADISON MAHASKA MARION
WARREN

IN SOUTHWEST IOWA

ADAIR

IN WEST CENTRAL IOWA

GREENE GUTHRIE

THIS INCLUDES THE CITIES OF ACKLEY, ADAIR, ADEL, AMES, BAYARD,
BOONE, CARLISLE, CASEY, CONRAD, DES MOINES, DIKE, DYSART,
EARLHAM, ELDORA, FONTANELLE, FORT DODGE, GLADBROOK, GREENFIELD,
GRINNELL, GRUNDY CENTER, GUTHRIE CENTER, INDIANOLA, IOWA FALLS,
JEFFERSON, KNOXVILLE, MARSHALLTOWN, NEWTON, NORWALK, OSKALOOSA,
PANORA, PELLA, PERRY, REINBECK, STUART, TAMA, TOLEDO, TRAER,
WAUKEE, WEBSTER CITY, WELLSBURG, AND WINTERSET.

* PRIMARY THREATS INCLUDE...

A FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLE.
SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
TO 75 MPH POSSIBLE.
SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
INCHES IN DIAMETER POSSIBLE.

Updated: Jul 20, 6:28 PM Source: NWS Alert

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 20 at 4:00PM CDT until July 20 at 8:00PM CDT by NWS Des Moines IA

Jul 20, 4:00 PM → Jul 20, 8:00 PM

WHAT: Heat index values of 100-105+ expected.

WHERE: Portions of central, south central, southeast, southwest,
and west central Iowa.

WHEN: Until 8 PM CDT this evening.

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

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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.