Hourly Weather | Today Monday, September 22, 2025
Pasadena, California
5 AM
Cloudy Night
66°
Feels Like 64°
7
Humidity: 80%
Wind: 4 mph
UV Index: 0
6 AM
Cloudy Night
64°
Feels Like 64°
7
Humidity: 79%
Wind: 2 mph
UV Index: 0
7 AM
Cloudy Weather
66°
Feels Like 64°
5
Humidity: 72%
Wind: 2 mph
UV Index: 0
8 AM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 63%
Wind: 4 mph
UV Index: 10
9 AM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 60%
Wind: 4 mph
UV Index: 20
10 AM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 57%
Wind: 5 mph
UV Index: 32
11 AM
Cloudy Weather
79°
Feels Like 82°
0
Humidity: 54%
Wind: 5 mph
UV Index: 45
12 PM
Cloudy Weather
81°
Feels Like 88°
0
Humidity: 48%
Wind: 6 mph
UV Index: 57
1 PM
Cloudy Weather
82°
Feels Like 90°
0
Humidity: 42%
Wind: 6 mph
UV Index: 64
2 PM
Cloudy Weather
84°
Feels Like 90°
0
Humidity: 40%
Wind: 7 mph
UV Index: 57
3 PM
Cloudy Weather
86°
Feels Like 90°
0
Humidity: 39%
Wind: 7 mph
UV Index: 45
4 PM
Cloudy Weather
84°
Feels Like 86°
0
Humidity: 42%
Wind: 7 mph
UV Index: 32
5 PM
Cloudy Weather
82°
Feels Like 84°
0
Humidity: 45%
Wind: 7 mph
UV Index: 20
6 PM
Cloudy Weather
81°
Feels Like 81°
0
Humidity: 49%
Wind: 6 mph
UV Index: 10
7 PM
Cloudy Night
79°
Feels Like 77°
0
Humidity: 56%
Wind: 5 mph
UV Index: 0
8 PM
Cloudy Night
75°
Feels Like 75°
0
Humidity: 63%
Wind: 4 mph
UV Index: 0
9 PM
Night
73°
Feels Like 73°
0
Humidity: 66%
Wind: 4 mph
UV Index: 0
10 PM
Night
72°
Feels Like 72°
0
Humidity: 69%
Wind: 4 mph
UV Index: 0
11 PM
Night
72°
Feels Like 70°
0
Humidity: 70%
Wind: 4 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

5 AM
66 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 28.25 µg/m³
  • PM10: 33.25 µg/m³
  • O₃: 7.87 ppb
  • NO₂: 29.95 ppb
  • SO₂: 3.85 ppb
  • CO: 349.47 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 AM
68 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 27.35 µg/m³
  • PM10: 31.52 µg/m³
  • O₃: 8.93 ppb
  • NO₂: 29.32 ppb
  • SO₂: 3.92 ppb
  • CO: 369.89 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 AM
69 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 27.99 µg/m³
  • PM10: 31.65 µg/m³
  • O₃: 10.12 ppb
  • NO₂: 28.35 ppb
  • SO₂: 3.88 ppb
  • CO: 390.62 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 AM
71 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 31.34 µg/m³
  • PM10: 32.00 µg/m³
  • O₃: 11.72 ppb
  • NO₂: 28.42 ppb
  • SO₂: 4.41 ppb
  • CO: 430.20 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 AM
72 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 24.26 µg/m³
  • PM10: 25.34 µg/m³
  • O₃: 24.93 ppb
  • NO₂: 24.35 ppb
  • SO₂: 5.10 ppb
  • CO: 361.45 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 AM
73 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 20.33 µg/m³
  • PM10: 21.93 µg/m³
  • O₃: 38.14 ppb
  • NO₂: 20.28 ppb
  • SO₂: 5.78 ppb
  • CO: 292.71 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 AM
73 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 19.47 µg/m³
  • PM10: 20.95 µg/m³
  • O₃: 51.36 ppb
  • NO₂: 16.21 ppb
  • SO₂: 6.46 ppb
  • CO: 223.97 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

12 PM
73 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 19.45 µg/m³
  • PM10: 20.82 µg/m³
  • O₃: 57.67 ppb
  • NO₂: 14.87 ppb
  • SO₂: 6.62 ppb
  • CO: 219.63 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

1 PM
73 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 20.20 µg/m³
  • PM10: 21.46 µg/m³
  • O₃: 63.99 ppb
  • NO₂: 13.54 ppb
  • SO₂: 6.78 ppb
  • CO: 215.29 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 PM
73 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 20.97 µg/m³
  • PM10: 22.14 µg/m³
  • O₃: 70.31 ppb
  • NO₂: 12.21 ppb
  • SO₂: 6.95 ppb
  • CO: 210.95 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 PM
73 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 21.57 µg/m³
  • PM10: 22.66 µg/m³
  • O₃: 70.33 ppb
  • NO₂: 12.06 ppb
  • SO₂: 6.95 ppb
  • CO: 207.99 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 PM
74 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 21.84 µg/m³
  • PM10: 22.86 µg/m³
  • O₃: 70.36 ppb
  • NO₂: 11.90 ppb
  • SO₂: 6.95 ppb
  • CO: 205.03 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 PM
74 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 21.80 µg/m³
  • PM10: 22.83 µg/m³
  • O₃: 70.39 ppb
  • NO₂: 11.74 ppb
  • SO₂: 6.96 ppb
  • CO: 202.07 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 PM
80 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 21.97 µg/m³
  • PM10: 22.97 µg/m³
  • O₃: 57.00 ppb
  • NO₂: 18.09 ppb
  • SO₂: 6.96 ppb
  • CO: 230.94 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 PM
77 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 23.63 µg/m³
  • PM10: 24.57 µg/m³
  • O₃: 43.62 ppb
  • NO₂: 24.44 ppb
  • SO₂: 6.95 ppb
  • CO: 259.81 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 PM
77 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 25.83 µg/m³
  • PM10: 26.85 µg/m³
  • O₃: 30.24 ppb
  • NO₂: 30.80 ppb
  • SO₂: 6.95 ppb
  • CO: 288.68 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 PM
77 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 28.79 µg/m³
  • PM10: 29.80 µg/m³
  • O₃: 23.61 ppb
  • NO₂: 34.63 ppb
  • SO₂: 6.80 ppb
  • CO: 322.20 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 PM
78 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 31.62 µg/m³
  • PM10: 32.57 µg/m³
  • O₃: 16.97 ppb
  • NO₂: 38.47 ppb
  • SO₂: 6.66 ppb
  • CO: 355.71 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 PM
80 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 33.13 µg/m³
  • PM10: 34.05 µg/m³
  • O₃: 10.34 ppb
  • NO₂: 42.31 ppb
  • SO₂: 6.52 ppb
  • CO: 389.22 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.