Hourly Weather | Today Monday, September 21, 2026
Nashua, New Hampshire
3 PM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 50%
UV Index: 3
Wind: 7 mph
4 PM
Cloudy Weather
66°
Feels Like 68°
0
Humidity: 52%
UV Index: 2
Wind: 7 mph
5 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 55%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 58%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 66%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Night
59°
Feels Like 59°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
9 PM
Night
57°
Feels Like 55°
0
Humidity: 80%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 85%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 77%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.91 µg/m³
  • PM10: 4.48 µg/m³
  • O3: 0.048 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 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: 4.05 µg/m³
  • PM10: 4.58 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.01 µg/m³
  • PM10: 4.53 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.84 µg/m³
  • PM10: 4.38 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.71 µg/m³
  • PM10: 4.33 µg/m³
  • O3: 0.041 ppm
  • NO2: 3.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.55 µg/m³
  • PM10: 4.26 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.28 µg/m³
  • PM10: 4.06 µg/m³
  • O3: 0.035 ppm
  • NO2: 4.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.07 µg/m³
  • PM10: 3.92 µg/m³
  • O3: 0.032 ppm
  • NO2: 4.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.99 µg/m³
  • PM10: 3.89 µg/m³
  • O3: 0.030 ppm
  • NO2: 4.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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