Today | Weather | Thursday, December 4, 2025

Weather in Broomfield, Colorado

03:07 AM
Now
Cloudy Night
16° F
Feels Like 12°
Precipitation 0 %
Wind 6 mph
Humidity 76 %
Today
Cloudy Weather
Day 39°
Night 25°
Precipitation 1 %
Wind 7 mph
UV Index (0 - 11+) 3

Broomfield Weather Forecast Updated

10 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 4, 2024)

Day

57°

Night

32°

Air Quality in Broomfield

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.56 µg/m³
PM10 1.57 µg/m³
O3 0.029 ppm
NO2 1.7 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 0.05 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)
PM2.51.56 µg/m³
PM101.57 µg/m³
O357.31 µg/m³
NO23.24 µg/m³
SO20.17 µg/m³
CO117.22 µg/m³
NH30.05 µg/m³
NO0 µg/m³