Hourly Weather | Today Tuesday, September 1, 2026
Merced, California
9 AM
Sunny Weather
63°
Feels Like 64°
0
Humidity: 64%
UV Index: 2
Wind: 6 mph
10 AM
Sunny Weather
66°
Feels Like 70°
0
Humidity: 57%
UV Index: 4
Wind: 6 mph
11 AM
Sunny Weather
70°
Feels Like 75°
0
Humidity: 52%
UV Index: 5
Wind: 5 mph
12 PM
Sunny Weather
72°
Feels Like 81°
0
Humidity: 47%
UV Index: 7
Wind: 6 mph
1 PM
Sunny Weather
73°
Feels Like 82°
0
Humidity: 42%
UV Index: 8
Wind: 6 mph
2 PM
Sunny Weather
75°
Feels Like 84°
0
Humidity: 38%
UV Index: 7
Wind: 6 mph
3 PM
Sunny Weather
77°
Feels Like 82°
0
Humidity: 35%
UV Index: 5
Wind: 6 mph
4 PM
Sunny Weather
79°
Feels Like 81°
0
Humidity: 34%
UV Index: 4
Wind: 7 mph
5 PM
Cloudy Weather
81°
Feels Like 81°
0
Humidity: 32%
UV Index: 2
Wind: 7 mph
6 PM
Sunny Weather
77°
Feels Like 75°
0
Humidity: 36%
UV Index: 1
Wind: 8 mph
7 PM
Sunny Weather
75°
Feels Like 72°
0
Humidity: 40%
UV Index: 0
Wind: 9 mph
8 PM
Night
72°
Feels Like 70°
0
Humidity: 45%
UV Index: 0
Wind: 9 mph
9 PM
Night
70°
Feels Like 66°
0
Humidity: 49%
UV Index: 0
Wind: 10 mph
10 PM
Night
66°
Feels Like 63°
0
Humidity: 54%
UV Index: 0
Wind: 10 mph
11 PM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 57%
UV Index: 0
Wind: 10 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.99 µg/m³
  • PM10: 9.94 µg/m³
  • O3: 0.034 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.12 µg/m³
  • PM10: 9.83 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.12 µg/m³
  • PM10: 9.6 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

12 PM
42 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.14 µg/m³
  • PM10: 15.01 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

1 PM
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.98 µg/m³
  • PM10: 20.21 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 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.

2 PM
78 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 24.87 µg/m³
  • PM10: 28.74 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

3 PM
106 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 37.8 µg/m³
  • PM10: 41.38 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

4 PM
129 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 47.09 µg/m³
  • PM10: 50.36 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

5 PM
141 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 51.92 µg/m³
  • PM10: 55.02 µg/m³
  • O3: 0.055 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

6 PM
112 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 40.37 µg/m³
  • PM10: 43.41 µg/m³
  • O3: 0.052 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

7 PM
71 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.71 µg/m³
  • PM10: 24.8 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 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.

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

Pollutant Concentrations:

  • PM2.5: 10.36 µg/m³
  • PM10: 13.61 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.47 µg/m³
  • PM10: 8.77 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.7 µg/m³
  • PM10: 7.06 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.8 µg/m³
  • PM10: 6.22 µg/m³
  • O3: 0.042 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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