Hourly Weather | Today Wednesday, March 18, 2026
Cary, North Carolina
2 PM
Cloudy Weather
46°
Feels Like 55°
7
Humidity: 27%
UV Index: 5
Wind: 5 mph
3 PM
Cloudy Weather
46°
Feels Like 55°
7
Humidity: 26%
UV Index: 4
Wind: 5 mph
4 PM
Cloudy Weather
48°
Feels Like 55°
7
Humidity: 25%
UV Index: 3
Wind: 5 mph
5 PM
Cloudy Weather
46°
Feels Like 52°
7
Humidity: 27%
UV Index: 2
Wind: 5 mph
6 PM
Cloudy Weather
48°
Feels Like 48°
7
Humidity: 28%
UV Index: 1
Wind: 5 mph
7 PM
Cloudy Weather
46°
Feels Like 45°
5
Humidity: 31%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Night
46°
Feels Like 45°
0
Humidity: 34%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
43°
Feels Like 43°
0
Humidity: 41%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
39°
Feels Like 39°
0
Humidity: 48%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
37°
Feels Like 37°
0
Humidity: 55%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.71 µg/m³
  • PM10: 3.82 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.69 µg/m³
  • PM10: 3.72 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.47 µg/m³
  • PM10: 3.43 µg/m³
  • O3: 0.062 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.27 µg/m³
  • PM10: 3.25 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.27 µg/m³
  • PM10: 4.14 µg/m³
  • O3: 0.058 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 2.53 µg/m³
  • PM10: 5.89 µg/m³
  • O3: 0.049 ppm
  • NO2: 3.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.79 µg/m³
  • PM10: 7.53 µg/m³
  • O3: 0.042 ppm
  • NO2: 5 ppb
  • SO2: 0.2 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.08 µg/m³
  • PM10: 8.92 µg/m³
  • O3: 0.039 ppm
  • NO2: 5.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.4 µg/m³
  • PM10: 9.93 µg/m³
  • O3: 0.037 ppm
  • NO2: 5.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.82 µg/m³
  • PM10: 10.68 µg/m³
  • O3: 0.036 ppm
  • NO2: 5.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.19 ppm

Health Recommendations:

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