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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today › Thursday, February 26, 2026
Active Weather Warnings
Thornton, Colorado
12 PM
Cloudy Weather
61°
Feels Like 57°
13
Humidity: 16%
UV Index: 4
Wind: 18 mph
1 PM
Cloudy Weather
61°
Feels Like 57°
0
Humidity: 15%
UV Index: 4
Wind: 18 mph
2 PM
Cloudy Weather
61°
Feels Like 59°
0
Humidity: 15%
UV Index: 3
Wind: 18 mph
3 PM
Sunny Weather
63°
Feels Like 59°
0
Humidity: 14%
UV Index: 2
Wind: 17 mph
4 PM
Sunny Weather
61°
Feels Like 55°
0
Humidity: 16%
UV Index: 2
Wind: 15 mph
5 PM
Cloudy Weather
57°
Feels Like 52°
0
Humidity: 19%
UV Index: 1
Wind: 14 mph
6 PM
Cloudy Night
55°
Feels Like 48°
0
Humidity: 22%
UV Index: 0
Wind: 12 mph
7 PM
Cloudy Night
52°
Feels Like 46°
0
Humidity: 24%
UV Index: 0
Wind: 10 mph
8 PM
Cloudy Night
48°
Feels Like 43°
0
Humidity: 27%
UV Index: 0
Wind: 9 mph
9 PM
Night
45°
Feels Like 39°
0
Humidity: 30%
UV Index: 0
Wind: 9 mph
10 PM
Night
43°
Feels Like 36°
0
Humidity: 35%
UV Index: 0
Wind: 9 mph
11 PM
Night
39°
Feels Like 34°
0
Humidity: 39%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

12 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.51 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.52 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.56 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.55 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.56 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.51 µg/m³
  • PM10: 0.6 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.56 µg/m³
  • PM10: 0.66 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.59 µg/m³
  • PM10: 0.69 µg/m³
  • O3: 0.040 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.62 µg/m³
  • PM10: 0.73 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.65 µg/m³
  • PM10: 0.76 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Thornton

Minor Past Observed

Fire Weather Watch

The Fire Weather Watch has been cancelled.
Feb 26, 11:00 AM → Feb 26, 5:00 PM
The Fire Weather Watch has been cancelled and is no longer in effect.
+ Read More
A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
Updated: Feb 26, 11:27 AM Source: NWS Alert