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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today › Saturday, August 29, 2026
Active Weather Warnings
Simi Valley, California
2 AM
Cloudy Night
75°
Feels Like 73°
0
Humidity: 56%
UV Index: 0
Wind: 5 mph
3 AM
Cloudy Night
75°
Feels Like 73°
0
Humidity: 63%
UV Index: 0
Wind: 5 mph
4 AM
Cloudy Night
73°
Feels Like 72°
0
Humidity: 63%
UV Index: 0
Wind: 5 mph
5 AM
Cloudy Night
72°
Feels Like 72°
0
Humidity: 67%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Night
70°
Feels Like 68°
0
Humidity: 74%
UV Index: 0
Wind: 4 mph
7 AM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 65%
UV Index: 0
Wind: 4 mph
8 AM
Sunny Weather
79°
Feels Like 81°
0
Humidity: 55%
UV Index: 2
Wind: 4 mph
9 AM
Sunny Weather
82°
Feels Like 88°
0
Humidity: 47%
UV Index: 3
Wind: 5 mph
10 AM
Sunny Weather
88°
Feels Like 91°
0
Humidity: 42%
UV Index: 4
Wind: 5 mph
11 AM
Cloudy Weather
91°
Feels Like 97°
0
Humidity: 38%
UV Index: 6
Wind: 7 mph
12 PM
Cloudy Weather
93°
Feels Like 99°
0
Humidity: 35%
UV Index: 8
Wind: 8 mph
1 PM
Cloudy Weather
93°
Feels Like 100°
0
Humidity: 34%
UV Index: 9
Wind: 9 mph
2 PM
Cloudy Weather
97°
Feels Like 99°
0
Humidity: 33%
UV Index: 8
Wind: 10 mph
3 PM
Sunny Weather
93°
Feels Like 97°
0
Humidity: 35%
UV Index: 6
Wind: 12 mph
4 PM
Sunny Weather
91°
Feels Like 93°
0
Humidity: 35%
UV Index: 4
Wind: 10 mph
5 PM
Sunny Weather
90°
Feels Like 90°
0
Humidity: 38%
UV Index: 3
Wind: 10 mph
6 PM
Sunny Weather
88°
Feels Like 88°
0
Humidity: 40%
UV Index: 2
Wind: 8 mph
7 PM
Sunny Weather
84°
Feels Like 82°
0
Humidity: 44%
UV Index: 0
Wind: 6 mph
8 PM
Night
81°
Feels Like 79°
0
Humidity: 51%
UV Index: 0
Wind: 5 mph
9 PM
Night
77°
Feels Like 75°
0
Humidity: 58%
UV Index: 0
Wind: 5 mph
10 PM
Night
75°
Feels Like 73°
0
Humidity: 63%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
72°
Feels Like 72°
0
Humidity: 69%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
156 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 67.46 µg/m³
  • PM10: 85.07 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

3 AM
152 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 59.69 µg/m³
  • PM10: 76.92 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

4 AM
132 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 48.21 µg/m³
  • PM10: 65.35 µg/m³
  • O3: 0.033 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

5 AM
107 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 38.16 µg/m³
  • PM10: 55.71 µg/m³
  • O3: 0.031 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

6 AM
93 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 32.14 µg/m³
  • PM10: 49.16 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 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.

7 AM
83 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 27.31 µg/m³
  • PM10: 44.08 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.9 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.

8 AM
72 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.41 µg/m³
  • PM10: 39.13 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

9 AM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.83 µg/m³
  • PM10: 35.39 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

10 AM
60 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.65 µg/m³
  • PM10: 33.11 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

11 AM
57 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.25 µg/m³
  • PM10: 31.59 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

12 PM
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.56 µg/m³
  • PM10: 31.05 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.39 µg/m³
  • PM10: 31.36 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.3 µg/m³
  • PM10: 31.63 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

3 PM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.59 µg/m³
  • PM10: 31.24 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

4 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.32 µg/m³
  • PM10: 30.47 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.94 µg/m³
  • PM10: 29.86 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

6 PM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.74 µg/m³
  • PM10: 29.24 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.67 µg/m³
  • PM10: 29.41 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.54 µg/m³
  • PM10: 32.33 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 19.71 µg/m³
  • PM10: 39.73 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 29.62 µg/m³
  • PM10: 50.24 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 38.63 µg/m³
  • PM10: 59.68 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Simi Valley

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 29 at 1:20AM PDT until August 29 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Aug 29, 1:20 AM → Aug 29, 8:00 PM
WHAT: Temperatures up to 103.

WHERE: A portion of southwest California.

WHEN: Until 8 PM PDT this evening.

IMPACTS: Hot temperatures may cause heat illnesses.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: Aug 29, 1:37 AM Source: NWS Alert

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