Today | Weather | Wednesday, May 20, 2026

Weather in Broomfield, Colorado

03:52 PM
Now
Rainy Weather
57° F
Feels Like 55°
Precipitation 59 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 57 %
Today
Partly Sunny with Showers
Day 61°
Night 39°
Precipitation 96 %
Wind 6 mph
UV Index (0 - 11+) 3

Broomfield Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 20, 2025)

Day

68°

Night

43°

Air Quality in Broomfield

NOW
40 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.91 µg/m³
PM10 1.55 µg/m³
O3 0.043 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.08 ppm
NH3 0.63 µg/m³
NO 0.07 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)
PM2.50.91 µg/m³
PM101.55 µg/m³
O385.17 µg/m³
NO20.24 µg/m³
SO20.13 µg/m³
CO90.68 µg/m³
NH30.63 µg/m³
NO0.07 µg/m³