Today | Weather | Tuesday, June 9, 2026

Weather in Rapid City, South Dakota

05:56 PM
Now
Sunny with a Chance of Thunderstorms
88° F
Feels Like 81°
Precipitation 54 %
Wind 16 mph
UV Index (0 - 11+) 1
Humidity 30 %
Today
Sunny with a Chance of Thunderstorms
Day 91°
Night 59°
Precipitation 55 %
Wind 21 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

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.

Rapid City Weather Forecast Updated

53 minutes ago
Last updated on

Air Quality in Rapid City

NOW
46 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.88 µg/m³
PM10 8.94 µg/m³
O3 0.050 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.07 ppm
NH3 1.15 µg/m³
NO 0.03 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)
PM2.52.88 µg/m³
PM108.94 µg/m³
O398.44 µg/m³
NO20.54 µg/m³
SO20.68 µg/m³
CO81.89 µg/m³
NH31.15 µg/m³
NO0.03 µg/m³