TODAY DEC11
TEMPERATURE64
HUMIDITY34
PRESSURE30.18
WIND COND.255 6.3
  • 6952Thu
  • 7052Fri
  • 6744Sat
  • 6044Sun
  • 6245Mon
daynightWeather update from Simi Valley - Cochran at
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Simi Valley Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January45°F62°F52°F19.1"
February46°F65°F54°F5.8"
March47°F69°F56°F3.2"
April47°F73°F58°F3.0"
May53°F79°F64°F0.6"
June59°F87°F71°F0.0"
July65°F96°F79°F0.0"
August63°F94°F76°F0.0"
September61°F90°F74°F28.1"
October57°F81°F67°F5.9"
November53°F74°F61°F1.3"
December44°F63°F52°F4.0"

Did you know?

  • The highest monthly average temperature in Simi Valley for July is 79 degrees.
  • The lowest monthly average temperature in Simi Valley for January is 52 degrees.
  • The most monthly precipitation in Simi Valley occurs in September with 28.1 inches.
  • The air quality index in Simi Valley is 49% worse than the national average.
  • The pollution index in Simi Valley is equal to the national average.

Compare Simi Valley, CA Weather To Other Cities

Simi Valley air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexSimi ValleyCaliforniaNational
Air quality index745550
Pollution index005,066,862

Simi Valley air quality information

MeasurementTotal
Days measured365
Days with good air quality25
Days with moderate air quality260
Days w/ poor A.Q. for sensitive groups76
Days with unhealthy air quality4

Simi Valley air quality information

PollutantTotal
Arsenic0.150%
Benzene0.190%
Carbon Tetrachloride0.010%
Lead0.180%
Mercury0.070%

Average monthly Simi Valley temperature with heat index

Simi Valley monthly precipitation with daily maximum

Simi Valley monthly snow depth with daily maximum

Simi Valley monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Casa Conejo, CA3,180484%
Piru, CA1,950484%
Westlake Village, CA8,443484%
Lake Sherwood, CA1,651484%
Thousand Oaks, CA128,623484%
Simi Valley, CA126,1267448%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Lafayette, LA125,8084412%
Kent, WA125,492492%
Concord, CA126,9384314%
Stamford, CT127,410476%
Topeka, KS127,4723628%
Simi Valley, CA126,1267448%
Source: The Simi Valley, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.
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