Today | Weather | Wednesday, November 4, 2026

Weather in Broomfield, Colorado

06:58 PM
Now
Cloudy Weather
46° F
Feels Like 45°
Precipitation 17 %
Wind 6 mph
Humidity 58 %
Today
Partly Sunny with Showers
Day 55°
Night 36°
Precipitation 50 %
Wind 6 mph
UV Index (0 - 11+) 3

Broomfield Weather Forecast Updated

34 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 4, 2025)
Cloudy Night

Day

75°

Night

37°

Wind

8 mph

Precipitation

0 %

Air Quality in Broomfield

NOW
35 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.2 µg/m³
PM10 2.52 µg/m³
O3 0.038 ppm
NO2 2.5 ppb
SO2 0.3 ppb
CO 0.11 ppm
NH3 0.18 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)
PM2.5 – 2.2 µg/m³
PM10 – 2.52 µg/m³
O3 – 74.04 µg/m³
NO2 – 4.78 µg/m³
SO2 – 0.67 µg/m³
CO – 126.18 µg/m³
NH3 – 0.18 µg/m³
NO – 0 µg/m³