Hourly Weather | Today Tuesday, July 21, 2026
Merced, California
2 AM
Cloudy Night
73°
Feels Like 72°
0
Humidity: 46%
UV Index: 0
Wind: 7 mph
3 AM
Cloudy Night
73°
Feels Like 70°
0
Humidity: 50%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 52%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 54%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Weather
70°
Feels Like 66°
0
Humidity: 57%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
72°
Feels Like 70°
0
Humidity: 53%
UV Index: 1
Wind: 6 mph
8 AM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 41%
UV Index: 1
Wind: 7 mph
9 AM
Cloudy Weather
82°
Feels Like 82°
0
Humidity: 31%
UV Index: 2
Wind: 7 mph
10 AM
Cloudy Weather
88°
Feels Like 90°
0
Humidity: 26%
UV Index: 4
Wind: 7 mph
11 AM
Cloudy Weather
90°
Feels Like 97°
0
Humidity: 23%
UV Index: 7
Wind: 6 mph
12 PM
Cloudy Weather
93°
Feels Like 100°
0
Humidity: 21%
UV Index: 10
Wind: 6 mph
1 PM
Cloudy Weather
95°
Feels Like 102°
0
Humidity: 21%
UV Index: 11
Wind: 6 mph
2 PM
Cloudy Weather
97°
Feels Like 104°
0
Humidity: 21%
UV Index: 10
Wind: 7 mph
3 PM
Cloudy Weather
99°
Feels Like 102°
0
Humidity: 22%
UV Index: 7
Wind: 7 mph
4 PM
Cloudy Weather
100°
Feels Like 102°
0
Humidity: 23%
UV Index: 5
Wind: 8 mph
5 PM
Cloudy Weather
100°
Feels Like 102°
0
Humidity: 23%
UV Index: 3
Wind: 8 mph
6 PM
Cloudy Weather
99°
Feels Like 99°
0
Humidity: 25%
UV Index: 2
Wind: 9 mph
7 PM
Cloudy Weather
97°
Feels Like 95°
0
Humidity: 28%
UV Index: 1
Wind: 10 mph
8 PM
Cloudy Weather
93°
Feels Like 90°
0
Humidity: 33%
UV Index: 0
Wind: 10 mph
9 PM
Cloudy Night
88°
Feels Like 84°
0
Humidity: 37%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Night
84°
Feels Like 81°
0
Humidity: 38%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Night
81°
Feels Like 79°
0
Humidity: 40%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.15 µg/m³
  • PM10: 6.36 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

3 AM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.27 µg/m³
  • PM10: 6.64 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

4 AM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.39 µg/m³
  • PM10: 6.95 µg/m³
  • O3: 0.026 ppm
  • NO2: 2 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

5 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.46 µg/m³
  • PM10: 7.17 µg/m³
  • O3: 0.025 ppm
  • NO2: 2 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

6 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.46 µg/m³
  • PM10: 7.27 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

7 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.44 µg/m³
  • PM10: 7.34 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

8 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.49 µg/m³
  • PM10: 7.47 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.16 µg/m³
  • PM10: 6.8 µg/m³
  • O3: 0.032 ppm
  • NO2: 2.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.28 µg/m³
  • PM10: 6.97 µg/m³
  • O3: 0.036 ppm
  • NO2: 2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.8 µg/m³
  • PM10: 7.57 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.22 µg/m³
  • PM10: 4 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.76 µg/m³
  • PM10: 2.74 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.87 µg/m³
  • PM10: 2.62 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.21 µg/m³
  • PM10: 2.88 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

4 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.4 µg/m³
  • PM10: 3.03 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.54 µg/m³
  • PM10: 3.15 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

6 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.75 µg/m³
  • PM10: 3.51 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.19 µg/m³
  • PM10: 4.23 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.52 µg/m³
  • PM10: 4.77 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.84 µg/m³
  • PM10: 5.24 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.41 µg/m³
  • PM10: 6 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.93 µg/m³
  • PM10: 6.67 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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