Today | Weather | Tuesday, October 21, 2025

Weather in Broomfield, Colorado

10:29 PM

Now

52° F

Feels Like 52°

Precipitation 0 %

Wind 4 mph

Humidity 29 %

Today

Day 70°

Night 37°

Precipitation 0 %

Wind 5 mph

Broomfield Weather Forecast Updated

31 minutes ago

Last updated on October 21, 2025 9:57 PM

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:

PM_2.5 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

PM_2.5 – 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)

PM_2.5 – 1 µg/m³

PM₁₀ – 1.26 µg/m³

O₃ – 58.02 µg/m³

NO₂ – 4.26 µg/m³

SO₂ – 0.08 µg/m³

CO – 104.03 µg/m³

NH₃ – 0.71 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast