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Hourly Weather | Today | Sunday, August 10, 2025
Heat Advisory (Issued when high temperatures and humidity create conditions that may be hazardous during outdoor activity or prolonged exposure.)
Rancho Cucamonga, California
2 AM
NightNighttime, with dark skies and stars or a moon visible.
70°
Feels Like 66°
0
Humidity: 69%
Wind: 4 mph
UV Index: 0
3 AM
NightNighttime, with dark skies and stars or a moon visible.
68°
Feels Like 66°
0
Humidity: 70%
Wind: 2 mph
UV Index: 0
4 AM
NightNighttime, with dark skies and stars or a moon visible.
66°
Feels Like 64°
0
Humidity: 71%
Wind: 2 mph
UV Index: 0
5 AM
NightNighttime, with dark skies and stars or a moon visible.
66°
Feels Like 64°
0
Humidity: 72%
Wind: 2 mph
UV Index: 0
6 AM
NightNighttime, with dark skies and stars or a moon visible.
64°
Feels Like 64°
0
Humidity: 73%
Wind: 2 mph
UV Index: 0
7 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
70°
Feels Like 70°
0
Humidity: 65%
Wind: 2 mph
UV Index: 1
8 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
73°
Feels Like 75°
0
Humidity: 55%
Wind: 2 mph
UV Index: 2
9 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
79°
Feels Like 82°
0
Humidity: 47%
Wind: 4 mph
UV Index: 3
10 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
82°
Feels Like 88°
0
Humidity: 42%
Wind: 5 mph
UV Index: 5
11 AM
Cloudy WeatherCloudy weather, overcast skies with clouds.
84°
Feels Like 91°
0
Humidity: 38%
Wind: 6 mph
UV Index: 7
12 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
88°
Feels Like 95°
0
Humidity: 34%
Wind: 8 mph
UV Index: 9
1 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
91°
Feels Like 97°
0
Humidity: 31%
Wind: 9 mph
UV Index: 11
2 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
93°
Feels Like 97°
0
Humidity: 28%
Wind: 12 mph
UV Index: 9
3 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
93°
Feels Like 97°
0
Humidity: 27%
Wind: 13 mph
UV Index: 7
4 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
93°
Feels Like 93°
0
Humidity: 28%
Wind: 14 mph
UV Index: 5
5 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
91°
Feels Like 90°
0
Humidity: 30%
Wind: 13 mph
UV Index: 3
6 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
88°
Feels Like 88°
0
Humidity: 33%
Wind: 12 mph
UV Index: 2
7 PM
Cloudy WeatherCloudy weather, overcast skies with clouds.
84°
Feels Like 82°
0
Humidity: 37%
Wind: 9 mph
UV Index: 1
8 PM
NightNighttime, with dark skies and stars or a moon visible.
82°
Feels Like 79°
0
Humidity: 42%
Wind: 8 mph
UV Index: 0
9 PM
NightNighttime, with dark skies and stars or a moon visible.
79°
Feels Like 77°
0
Humidity: 47%
Wind: 7 mph
UV Index: 0
10 PM
NightNighttime, with dark skies and stars or a moon visible.
75°
Feels Like 73°
0
Humidity: 52%
Wind: 6 mph
UV Index: 0
11 PM
NightNighttime, with dark skies and stars or a moon visible.
73°
Feels Like 72°
0
Humidity: 56%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 17.41 µg/m³
  • PM10: 25.52 µg/m³
  • O₃: 12.15 ppb
  • NO₂: 22.23 ppb
  • SO₂: 3.20 ppb
  • CO: 260.21 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

3 AM
59 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 17.64 µg/m³
  • PM10: 23.84 µg/m³
  • O₃: 10.66 ppb
  • NO₂: 22.11 ppb
  • SO₂: 3.37 ppb
  • CO: 246.85 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

4 AM
60 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 17.17 µg/m³
  • PM10: 22.25 µg/m³
  • O₃: 9.63 ppb
  • NO₂: 21.60 ppb
  • SO₂: 3.39 ppb
  • CO: 235.65 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 16.35 µg/m³
  • PM10: 20.73 µg/m³
  • O₃: 8.84 ppb
  • NO₂: 20.91 ppb
  • SO₂: 3.33 ppb
  • CO: 225.52 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 16.53 µg/m³
  • PM10: 17.12 µg/m³
  • O₃: 10.48 ppb
  • NO₂: 19.72 ppb
  • SO₂: 3.90 ppb
  • CO: 204.65 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 16.46 µg/m³
  • PM10: 17.14 µg/m³
  • O₃: 14.80 ppb
  • NO₂: 17.73 ppb
  • SO₂: 3.93 ppb
  • CO: 202.51 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 15.80 µg/m³
  • PM10: 16.54 µg/m³
  • O₃: 19.13 ppb
  • NO₂: 15.73 ppb
  • SO₂: 3.95 ppb
  • CO: 200.37 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 14.70 µg/m³
  • PM10: 15.78 µg/m³
  • O₃: 28.39 ppb
  • NO₂: 14.64 ppb
  • SO₂: 4.00 ppb
  • CO: 193.88 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 14.98 µg/m³
  • PM10: 16.40 µg/m³
  • O₃: 37.66 ppb
  • NO₂: 13.55 ppb
  • SO₂: 4.06 ppb
  • CO: 187.38 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 15.81 µg/m³
  • PM10: 17.33 µg/m³
  • O₃: 46.93 ppb
  • NO₂: 12.47 ppb
  • SO₂: 4.11 ppb
  • CO: 180.88 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 15.65 µg/m³
  • PM10: 16.78 µg/m³
  • O₃: 55.62 ppb
  • NO₂: 10.85 ppb
  • SO₂: 4.17 ppb
  • CO: 174.74 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 16.57 µg/m³
  • PM10: 17.74 µg/m³
  • O₃: 64.31 ppb
  • NO₂: 9.23 ppb
  • SO₂: 4.22 ppb
  • CO: 168.60 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 17.55 µg/m³
  • PM10: 18.92 µg/m³
  • O₃: 73.00 ppb
  • NO₂: 7.61 ppb
  • SO₂: 4.28 ppb
  • CO: 162.45 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 19.31 µg/m³
  • PM10: 20.71 µg/m³
  • O₃: 77.29 ppb
  • NO₂: 7.23 ppb
  • SO₂: 4.61 ppb
  • CO: 162.53 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 21.07 µg/m³
  • PM10: 22.45 µg/m³
  • O₃: 81.57 ppb
  • NO₂: 6.84 ppb
  • SO₂: 4.94 ppb
  • CO: 162.60 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

5 PM
84 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 22.62 µg/m³
  • PM10: 23.85 µg/m³
  • O₃: 85.86 ppb
  • NO₂: 6.46 ppb
  • SO₂: 5.27 ppb
  • CO: 162.68 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

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

Pollutant Concentrations:

  • PM2.5: 23.05 µg/m³
  • PM10: 24.14 µg/m³
  • O₃: 76.10 ppb
  • NO₂: 8.84 ppb
  • SO₂: 5.49 ppb
  • CO: 169.58 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

7 PM
106 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 22.77 µg/m³
  • PM10: 23.68 µg/m³
  • O₃: 66.34 ppb
  • NO₂: 11.22 ppb
  • SO₂: 5.72 ppb
  • CO: 176.48 ppb

Health Recommendations:

Air quality may be unhealthy for sensitive groups. The general public is not likely to be affected.

8 PM
106 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 22.33 µg/m³
  • PM10: 22.90 µg/m³
  • O₃: 56.59 ppb
  • NO₂: 13.60 ppb
  • SO₂: 5.94 ppb
  • CO: 183.39 ppb

Health Recommendations:

Air quality may be unhealthy for sensitive groups. The general public is not likely to be affected.

9 PM
100 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 21.83 µg/m³
  • PM10: 22.23 µg/m³
  • O₃: 45.85 ppb
  • NO₂: 15.27 ppb
  • SO₂: 5.73 ppb
  • CO: 191.76 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.

10 PM
85 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 21.47 µg/m³
  • PM10: 21.86 µg/m³
  • O₃: 35.12 ppb
  • NO₂: 16.95 ppb
  • SO₂: 5.52 ppb
  • CO: 200.13 ppb

Health Recommendations:

Air quality is acceptable. Individuals with unusual sensitivity may be at risk from certain pollutants.