Today | Weather | Tuesday, September 9, 2025

Weather in Sioux Falls, South Dakota

10:27 AM
Now
Stormy Weather
66° F
Feels Like 64°
Precipitation 44 %
Wind 9 mph
UV Index (0 - 11+) 11
Humidity 84 %
Today
Sunny with a Chance of Thunderstorms
Day 82°
Night 57°
Precipitation 80 %
Wind 13
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Other:

Periods of clouds and sunshine with a storm in parts of the area; muggy.

Sioux Falls Weather Forecast Updated

57 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 9, 2024)

Sunny Weather

Day

86°

Night

68°

Wind

14 mph

UV Index

5

Precipitation

4

Air quality in Sioux Falls

NOW
43 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 4.98 µg/m³
PM10 5.06 µg/m³
O₃ 37.97 ppb
NO₂ 2.42 ppb
SO₂ 0.40 ppb
CO 206.81 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors