Hourly Weather | Today Monday, April 27, 2026
Simi Valley, California
12 PM
Cloudy Weather
63°
Feels Like 66°
2
Humidity: 45%
UV Index: 4
Wind: 8 mph
1 PM
Cloudy Weather
64°
Feels Like 66°
1
Humidity: 43%
UV Index: 4
Wind: 9 mph
2 PM
Cloudy Weather
66°
Feels Like 72°
0
Humidity: 41%
UV Index: 9
Wind: 12 mph
3 PM
Cloudy Weather
64°
Feels Like 70°
0
Humidity: 44%
UV Index: 7
Wind: 12 mph
4 PM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 46%
UV Index: 4
Wind: 12 mph
5 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 51%
UV Index: 3
Wind: 10 mph
6 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 54%
UV Index: 2
Wind: 10 mph
7 PM
Cloudy Weather
59°
Feels Like 57°
0
Humidity: 58%
UV Index: 1
Wind: 9 mph
8 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 67%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 75%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 84%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 87%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

12 PM
88 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.39 µg/m³
  • PM10: 3.15 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

1 PM
88 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.41 µg/m³
  • PM10: 3.29 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.44 µg/m³
  • PM10: 3.47 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.49 µg/m³
  • PM10: 3.71 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

4 PM
88 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.54 µg/m³
  • PM10: 3.98 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.59 µg/m³
  • PM10: 4.23 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.63 µg/m³
  • PM10: 4.46 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

7 PM
86 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.66 µg/m³
  • PM10: 4.62 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

8 PM
85 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.68 µg/m³
  • PM10: 4.74 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

9 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.7 µg/m³
  • PM10: 4.87 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

10 PM
81 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.74 µg/m³
  • PM10: 5.05 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

11 PM
80 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.78 µg/m³
  • PM10: 5.19 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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