Today | Weather | Thursday, October 8, 2026

Weather in Thornton, Colorado

03:52 PM
Now
Partly Sunny with Showers
84° F
Feels Like 82°
Precipitation 50 %
Wind 7 mph
UV Index (0 - 11+) 2
Humidity 16 %
Today
Partly Sunny with Showers
Day 84°
Night 55°
Precipitation 50 %
Wind 6 mph
UV Index (0 - 11+) 5

Thornton Weather Forecast Updated

19 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 8, 2025)
Night

Day

77°

Night

50°

Wind

6 mph

Precipitation

25 %

Air Quality in Thornton

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.66 µg/m³
PM10 1.95 µg/m³
O3 0.044 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.06 ppm
NH3 0.1 µg/m³
NO 0.04 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 – 1.66 µg/m³
PM10 – 1.95 µg/m³
O3 – 86.15 µg/m³
NO2 – 0.19 µg/m³
SO2 – 0.13 µg/m³
CO – 68.98 µg/m³
NH3 – 0.1 µg/m³
NO – 0.04 µg/m³