Today | Weather | Monday, June 29, 2026

Active Weather Warnings

Weather in Watertown, South Dakota

08:12 PM

Now

82° F

Feels Like 84°

Precipitation 6 %

Wind 14 mph

UV Index (0 - 11+) 1

Humidity 65 %

Today

Day 93°

Night 61°

Precipitation 55 %

Wind 16 mph

UV Index (0 - 11+) 3

Watertown Weather Forecast Updated

Air Quality in Watertown

NOW

25 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2.26 µg/m³

PM₁₀ 2.47 µg/m³

O₃ 0.027 ppm

NO₂ 0.5 ppb

SO₂ 0 ppb

CO 0.10 ppm

NH₃ 1.89 µg/m³

NO 0.07 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 – 2.26 µg/m³

PM₁₀ – 2.47 µg/m³

O₃ – 53.13 µg/m³

NO₂ – 0.88 µg/m³

SO₂ – 0.02 µg/m³

CO – 115.57 µg/m³

NH₃ – 1.89 µg/m³

NO – 0.07 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Watertown

Severe Future Possible

Severe Thunderstorm Watch

Severe Thunderstorm Watch issued June 29 at 6:33PM CDT until June 30 at 12:00AM CDT by NWS Aberdeen SD

Jun 29, 6:33 PM → Jun 30, 12:00 AM

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
417 IN EFFECT UNTIL MIDNIGHT CDT TONIGHT FOR THE FOLLOWING AREAS

IN MINNESOTA THIS WATCH INCLUDES 2 COUNTIES

IN WEST CENTRAL MINNESOTA

BIG STONE TRAVERSE

IN SOUTH DAKOTA THIS WATCH INCLUDES 4 COUNTIES

IN NORTHEAST SOUTH DAKOTA

CODINGTON DEUEL GRANT
HAMLIN

THIS INCLUDES THE CITIES OF CLEAR LAKE, HAYTI, MILBANK,
ORTONVILLE, WATERTOWN, AND WHEATON.

Updated: Jun 29, 7:22 PM Source: NWS Alert

Moderate Expected Likely

Heat Advisory

Heat Advisory issued June 29 at 1:02PM CDT until June 29 at 8:00PM CDT by NWS Aberdeen SD

Jun 29, 1:02 PM → Jun 29, 8:00 PM

WHAT: Heat index values up to 105.

WHERE: In Minnesota, Big Stone and Traverse Counties. In South
Dakota, Codington, Deuel, Grant, and Hamlin Counties.

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. 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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.