Today | Weather | Tuesday, April 7, 2026

Weather in Rapid City, South Dakota

07:41 AM
Now
Cloudy Weather
34° F
Feels Like 21°
Precipitation 0 %
Wind 17 mph
UV Index (0 - 11+) 1
Humidity 63 %
Today
Cloudy Weather
Day 72°
Night 41°
Precipitation 1 %
Wind 15 mph
UV Index (0 - 11+) 4
Overnight Frost 3 AM – 3 AM

Rapid City Weather Forecast Updated

Last updated on

Air Quality in Rapid City

NOW
38 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.66 µg/m³
O3 0.041 ppm
NO2 0.4 ppb
SO2 0 ppb
CO 0.11 ppm
NH3 4.54 µg/m³
NO 0.05 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)
PM2.50.5 µg/m³
PM100.66 µg/m³
O380.14 µg/m³
NO20.81 µg/m³
SO20.06 µg/m³
CO129.08 µg/m³
NH34.54 µg/m³
NO0.05 µg/m³