Hourly Weather | Today Monday, September 21, 2026
Rochester, New Hampshire
3 PM
Cloudy Weather
68°
Feels Like 72°
0
Humidity: 53%
UV Index: 4
Wind: 7 mph
4 PM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 52%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 56%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 59%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 64%
UV Index: 0
Wind: 4 mph
8 PM
Cloudy Night
59°
Feels Like 59°
0
Humidity: 66%
UV Index: 0
Wind: 4 mph
9 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 70%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 75%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
52°
Feels Like 50°
0
Humidity: 78%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.26 µg/m³
  • PM10: 3.77 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.17 µg/m³
  • PM10: 3.67 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.96 µg/m³
  • PM10: 3.47 µg/m³
  • O3: 0.044 ppm
  • NO2: 2 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.87 µg/m³
  • PM10: 3.5 µg/m³
  • O3: 0.039 ppm
  • NO2: 3.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.04 µg/m³
  • PM10: 3.97 µg/m³
  • O3: 0.033 ppm
  • NO2: 5.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.25 µg/m³
  • PM10: 4.49 µg/m³
  • O3: 0.029 ppm
  • NO2: 6.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.36 µg/m³
  • PM10: 4.84 µg/m³
  • O3: 0.026 ppm
  • NO2: 7.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.46 µg/m³
  • PM10: 5.09 µg/m³
  • O3: 0.024 ppm
  • NO2: 7 ppb
  • SO2: 0.4 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.51 µg/m³
  • PM10: 5.14 µg/m³
  • O3: 0.022 ppm
  • NO2: 6.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.21 ppm

Health Recommendations:

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