Today | Weather | Wednesday, December 24, 2025

Weather in Thornton, Colorado

09:24 AM
Now
Cloudy Weather
48° F
Feels Like 48°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 29 %
Today
Cloudy Weather
Day 70°
Night 45°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 2

Thornton Weather Forecast Updated

53 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 24, 2024)
Cloudy Weather

Day

54°

Night

30°

Wind

4 mph

UV Index

2

Precipitation

0 %

Air Quality in Thornton

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.21 µg/m³
PM10 1.46 µg/m³
O3 0.029 ppm
NO2 1.4 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 0.16 µg/m³
NO 0.29 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)
PM2.51.21 µg/m³
PM101.46 µg/m³
O357.35 µg/m³
NO22.7 µg/m³
SO20.14 µg/m³
CO101.36 µg/m³
NH30.16 µg/m³
NO0.29 µg/m³