Hourly Weather | Today Wednesday, March 18, 2026
Merced, California
10 AM
Sunny Weather
64°
Feels Like 72°
0
Humidity: 83%
UV Index: 3
Wind: 2 mph
11 AM
Sunny Weather
70°
Feels Like 77°
0
Humidity: 74%
UV Index: 4
Wind: 2 mph
12 PM
Sunny Weather
75°
Feels Like 84°
0
Humidity: 59%
UV Index: 5
Wind: 4 mph
1 PM
Sunny Weather
82°
Feels Like 91°
0
Humidity: 48%
UV Index: 5
Wind: 2 mph
2 PM
Sunny Weather
86°
Feels Like 93°
0
Humidity: 43%
UV Index: 5
Wind: 4 mph
3 PM
Sunny Weather
88°
Feels Like 93°
0
Humidity: 40%
UV Index: 4
Wind: 4 mph
4 PM
Sunny Weather
90°
Feels Like 91°
0
Humidity: 36%
UV Index: 3
Wind: 6 mph
5 PM
Sunny Weather
88°
Feels Like 90°
0
Humidity: 38%
UV Index: 2
Wind: 6 mph
6 PM
Sunny Weather
88°
Feels Like 86°
0
Humidity: 40%
UV Index: 1
Wind: 6 mph
7 PM
Sunny Weather
82°
Feels Like 81°
0
Humidity: 47%
UV Index: 0
Wind: 6 mph
8 PM
Night
81°
Feels Like 79°
0
Humidity: 52%
UV Index: 0
Wind: 5 mph
9 PM
Night
75°
Feels Like 75°
0
Humidity: 63%
UV Index: 0
Wind: 5 mph
10 PM
Night
73°
Feels Like 72°
0
Humidity: 70%
UV Index: 0
Wind: 5 mph
11 PM
Night
70°
Feels Like 68°
0
Humidity: 76%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 AM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.95 µg/m³
  • PM10: 13.79 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

11 AM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11 µg/m³
  • PM10: 13.96 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.37 µg/m³
  • PM10: 11.89 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.81 µg/m³
  • PM10: 11.18 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.03 µg/m³
  • PM10: 11.36 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.61 µg/m³
  • PM10: 13.02 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 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
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13.14 µg/m³
  • PM10: 15.7 µg/m³
  • O3: 0.060 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.

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

Pollutant Concentrations:

  • PM2.5: 15.59 µg/m³
  • PM10: 18.36 µg/m³
  • O3: 0.063 ppm
  • NO2: 1.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.36 µg/m³
  • PM10: 21.38 µg/m³
  • O3: 0.063 ppm
  • NO2: 1.6 ppb
  • SO2: 0.2 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.

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

Pollutant Concentrations:

  • PM2.5: 21.1 µg/m³
  • PM10: 24.37 µg/m³
  • O3: 0.060 ppm
  • NO2: 2.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

8 PM
75 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.52 µg/m³
  • PM10: 27.04 µg/m³
  • O3: 0.056 ppm
  • NO2: 3 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

9 PM
76 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 24.1 µg/m³
  • PM10: 27.68 µg/m³
  • O3: 0.050 ppm
  • NO2: 3.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

10 PM
76 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 24.24 µg/m³
  • PM10: 27.83 µg/m³
  • O3: 0.045 ppm
  • NO2: 3 ppb
  • SO2: 0.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

11 PM
77 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 24.55 µg/m³
  • PM10: 28.17 µg/m³
  • O3: 0.041 ppm
  • NO2: 2.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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