Hourly Weather | Today Wednesday, March 18, 2026
Manchester, New Hampshire
9 AM
Cloudy Weather
27°
Feels Like 18°
0
Humidity: 35%
UV Index: 2
Wind: 10 mph
10 AM
Cloudy Weather
28°
Feels Like 23°
0
Humidity: 32%
UV Index: 3
Wind: 9 mph
11 AM
Cloudy Weather
28°
Feels Like 28°
0
Humidity: 28%
UV Index: 4
Wind: 9 mph
12 PM
Cloudy Weather
30°
Feels Like 32°
0
Humidity: 26%
UV Index: 4
Wind: 8 mph
1 PM
Cloudy Weather
32°
Feels Like 36°
0
Humidity: 24%
UV Index: 5
Wind: 7 mph
2 PM
Cloudy Weather
34°
Feels Like 37°
0
Humidity: 23%
UV Index: 4
Wind: 6 mph
3 PM
Cloudy Weather
34°
Feels Like 37°
0
Humidity: 22%
UV Index: 4
Wind: 7 mph
4 PM
Cloudy Weather
34°
Feels Like 36°
0
Humidity: 21%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
36°
Feels Like 36°
0
Humidity: 20%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
34°
Feels Like 32°
0
Humidity: 23%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Night
34°
Feels Like 28°
0
Humidity: 27%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
30°
Feels Like 28°
0
Humidity: 34%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
28°
Feels Like 27°
0
Humidity: 42%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
27°
Feels Like 27°
0
Humidity: 49%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
27°
Feels Like 27°
0
Humidity: 54%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.6 µg/m³
  • PM10: 0.91 µg/m³
  • O3: 0.048 ppm
  • NO2: 2.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

10 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.58 µg/m³
  • PM10: 0.86 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

11 AM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.56 µg/m³
  • PM10: 0.83 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.53 µg/m³
  • PM10: 0.8 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.54 µg/m³
  • PM10: 0.86 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.63 µg/m³
  • PM10: 1 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

3 PM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.9 µg/m³
  • PM10: 1.29 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.15 µg/m³
  • PM10: 1.59 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.43 µg/m³
  • PM10: 1.92 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.77 µg/m³
  • PM10: 2.37 µg/m³
  • O3: 0.055 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 2.23 µg/m³
  • PM10: 3 µg/m³
  • O3: 0.053 ppm
  • NO2: 3.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.64 µg/m³
  • PM10: 3.6 µg/m³
  • O3: 0.051 ppm
  • NO2: 3.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.98 µg/m³
  • PM10: 4.14 µg/m³
  • O3: 0.048 ppm
  • NO2: 4.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.37 µg/m³
  • PM10: 4.76 µg/m³
  • O3: 0.046 ppm
  • NO2: 4.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.86 µg/m³
  • PM10: 5.52 µg/m³
  • O3: 0.045 ppm
  • NO2: 4.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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