Hourly Weather | Today Wednesday, May 20, 2026
Nashua, New Hampshire
9 PM
Cloudy Night
77°
Feels Like 73°
8
Humidity: 45%
UV Index: 0
Wind: 10 mph
10 PM
Cloudy Night
73°
Feels Like 72°
8
Humidity: 47%
UV Index: 0
Wind: 9 mph
11 PM
Cloudy Night
72°
Feels Like 68°
8
Humidity: 48%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.55 µg/m³
  • PM10: 2.81 µg/m³
  • O3: 0.034 ppm
  • NO2: 3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.02 µg/m³
  • PM10: 2.31 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 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: 1.46 µg/m³
  • PM10: 1.77 µg/m³
  • O3: 0.034 ppm
  • NO2: 2.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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