Today | Weather | Tuesday, October 21, 2025

Weather in Broomfield, Colorado

10:29 PM
Now
Night
52° F
Feels Like 52°
Precipitation 0 %
Wind 4 mph
Humidity 29 %
Today
Night
Day 70°
Night 37°
Precipitation 0 %
Wind 5 mph

Broomfield Weather Forecast Updated

31 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (October 21, 2024)

Day

64°

Night

48°

Air Quality in Broomfield

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1 µg/m³
PM10 1.26 µg/m³
O3 0.030 ppm
NO2 2.3 ppb
SO2 0 ppb
CO 0.09 ppm
NH3 0.71 µg/m³
NO 0 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 µg/m³
PM101.26 µg/m³
O358.02 µg/m³
NO24.26 µg/m³
SO20.08 µg/m³
CO104.03 µg/m³
NH30.71 µg/m³
NO0 µg/m³