Hourly Weather | Today Monday, April 27, 2026
Longmont, Colorado
9 PM
Rainy Weather
46°
Feels Like 37°
61
Humidity: 80%
UV Index: 0
Wind: 8 mph
10 PM
Rainy Weather
45°
Feels Like 36°
61
Humidity: 81%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Weather
43°
Feels Like 37°
40
Humidity: 86%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.52 µg/m³
  • PM10: 0.61 µg/m³
  • O3: 0.036 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.

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

Pollutant Concentrations:

  • PM2.5: 0.53 µg/m³
  • PM10: 0.64 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.55 µg/m³
  • PM10: 0.69 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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