Hourly Weather | Today Thursday, February 26, 2026
Nashua, New Hampshire
2 AM
Cloudy Night
19°
Feels Like 16°
0
Frost Risk: 100%
Humidity: 66%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
19°
Feels Like 16°
0
Frost Risk: 100%
Humidity: 67%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
18°
Feels Like 14°
0
Frost Risk: 100%
Humidity: 68%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
16°
Feels Like 12°
0
Frost Risk: 100%
Humidity: 69%
UV Index: 0
Wind: 5 mph
6 AM
Cloudy Night
12°
Feels Like 10°
0
Frost Risk: 100%
Humidity: 78%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Weather
16°
Feels Like 16°
0
Frost Risk: 100%
Humidity: 72%
UV Index: 0
Wind: 5 mph
8 AM
Cloudy Weather
18°
Feels Like 19°
0
Frost Risk: 100%
Humidity: 64%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
25°
Feels Like 27°
0
Frost Risk: 43%
Humidity: 56%
UV Index: 2
Wind: 6 mph
10 AM
Cloudy Weather
27°
Feels Like 30°
0
Humidity: 52%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
30°
Feels Like 34°
0
Humidity: 49%
UV Index: 3
Wind: 7 mph
12 PM
Cloudy Weather
34°
Feels Like 36°
0
Humidity: 46%
UV Index: 4
Wind: 7 mph
1 PM
Cloudy Weather
36°
Feels Like 37°
0
Humidity: 43%
UV Index: 3
Wind: 8 mph
2 PM
Cloudy Weather
37°
Feels Like 37°
0
Humidity: 43%
UV Index: 3
Wind: 8 mph
3 PM
Cloudy Weather
39°
Feels Like 39°
0
Humidity: 44%
UV Index: 2
Wind: 8 mph
4 PM
Cloudy Weather
37°
Feels Like 36°
0
Humidity: 50%
UV Index: 1
Wind: 7 mph
5 PM
Cloudy Weather
36°
Feels Like 34°
0
Humidity: 55%
UV Index: 0
Wind: 7 mph
6 PM
Cloudy Night
34°
Feels Like 30°
0
Humidity: 62%
UV Index: 0
Wind: 6 mph
7 PM
Cloudy Night
30°
Feels Like 27°
1
Humidity: 69%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
28°
Feels Like 25°
1
Humidity: 75%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
27°
Feels Like 25°
1
Humidity: 76%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
27°
Feels Like 23°
1
Humidity: 78%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
25°
Feels Like 21°
1
Frost Risk: 99%
Humidity: 83%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
64 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.76 µg/m³
  • PM10: 21.37 µg/m³
  • O3: 0.030 ppm
  • NO2: 12.9 ppb
  • SO2: 0.8 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

3 AM
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.29 µg/m³
  • PM10: 18.49 µg/m³
  • O3: 0.031 ppm
  • NO2: 10.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

4 AM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.6 µg/m³
  • PM10: 15.35 µg/m³
  • O3: 0.033 ppm
  • NO2: 8.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

5 AM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.03 µg/m³
  • PM10: 12.37 µg/m³
  • O3: 0.034 ppm
  • NO2: 6.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

6 AM
38 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.18 µg/m³
  • PM10: 10.25 µg/m³
  • O3: 0.035 ppm
  • NO2: 5.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

7 AM
34 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.23 µg/m³
  • PM10: 9.3 µg/m³
  • O3: 0.035 ppm
  • NO2: 6 ppb
  • SO2: 0.5 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

8 AM
32 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.64 µg/m³
  • PM10: 8.86 µg/m³
  • O3: 0.034 ppm
  • NO2: 7.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.9 µg/m³
  • PM10: 8.21 µg/m³
  • O3: 0.036 ppm
  • NO2: 7.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.9 µg/m³
  • PM10: 7.09 µg/m³
  • O3: 0.038 ppm
  • NO2: 5.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.94 µg/m³
  • PM10: 3.48 µg/m³
  • O3: 0.044 ppm
  • NO2: 3 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.48 µg/m³
  • PM10: 2.93 µg/m³
  • O3: 0.047 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.

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

Pollutant Concentrations:

  • PM2.5: 2.72 µg/m³
  • PM10: 3.15 µg/m³
  • O3: 0.048 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.

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

Pollutant Concentrations:

  • PM2.5: 3.38 µg/m³
  • PM10: 3.86 µg/m³
  • O3: 0.050 ppm
  • NO2: 2.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.12 µg/m³
  • PM10: 4.72 µg/m³
  • O3: 0.050 ppm
  • NO2: 2.7 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: 4.76 µg/m³
  • PM10: 5.48 µg/m³
  • O3: 0.048 ppm
  • NO2: 3.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.62 µg/m³
  • PM10: 6.56 µg/m³
  • O3: 0.045 ppm
  • NO2: 6.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.20 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: 7.04 µg/m³
  • PM10: 8.33 µg/m³
  • O3: 0.040 ppm
  • NO2: 10.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.23 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.08 µg/m³
  • PM10: 10.8 µg/m³
  • O3: 0.036 ppm
  • NO2: 12.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

8 PM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.04 µg/m³
  • PM10: 13.16 µg/m³
  • O3: 0.032 ppm
  • NO2: 13.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

9 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.26 µg/m³
  • PM10: 14.56 µg/m³
  • O3: 0.031 ppm
  • NO2: 14.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

10 PM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.9 µg/m³
  • PM10: 14.07 µg/m³
  • O3: 0.030 ppm
  • NO2: 13.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

11 PM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.81 µg/m³
  • PM10: 11.56 µg/m³
  • O3: 0.031 ppm
  • NO2: 10.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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