Today | Weather | Tuesday, September 1, 2026

Weather in Rapid City, South Dakota

09:25 AM
Now
Stormy Weather
64° F
Feels Like 61°
Precipitation 54 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 56 %
Today
Sunny with a Chance of Thunderstorms
Day 73°
Night 55°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 6

Rapid City Weather Forecast Updated

22 minutes ago
Last updated on

Air Quality in Rapid City

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.84 µg/m³
PM10 2.55 µg/m³
O3 0.028 ppm
NO2 1.2 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 1.64 µg/m³
NO 0.29 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)
PM2.51.84 µg/m³
PM102.55 µg/m³
O354.88 µg/m³
NO22.34 µg/m³
SO20.27 µg/m³
CO97.46 µg/m³
NH31.64 µg/m³
NO0.29 µg/m³