TODAY OCT20
TEMPERATURE80
HUMIDITY16
PRESSURE
WIND COND.275 1
  • 8760Sat
  • 8258Sun
  • 7957Mon
  • 7757Tue
  • 7956Wed
daynightWeather update from CW5283 Foothill Ranch at
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Lake Forest 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
January48°F69°F57°F2.3"
February49°F69°F58°F1.9"
March52°F70°F60°F0.9"
April54°F72°F62°F0.6"
May59°F73°F65°F0.3"
June62°F76°F67°F0.0"
July66°F80°F71°F0.1"
August66°F82°F72°F0.0"
September65°F82°F72°F0.2"
October60°F79°F68°F0.5"
November54°F75°F63°F0.7"
December48°F68°F57°F2.4"

Did you know?

  • The highest monthly average temperature in Lake Forest for August is 72 degrees.
  • The lowest monthly average temperature in Lake Forest for December is 57 degrees.
  • The most monthly precipitation in Lake Forest occurs in December with 2.4 inches.
  • The air quality index in Lake Forest is 70% worse than the national average.
  • The pollution index in Lake Forest is 772% worse than the national average.

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Compare Lake Forest, CA Weather To Other Cities

Lake Forest 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.
IndexLake ForestCaliforniaNational
Air quality index855550
Pollution index44,192,60018,106,7265,066,862

Lake Forest air quality information

MeasurementTotal
Days measured365
Days with good air quality24
Days with moderate air quality211
Days w/ poor A.Q. for sensitive groups102
Days with unhealthy air quality25

Lake Forest air quality information

PollutantTotal
Arsenic0.030%
Benzene0.280%
Carbon Tetrachloride0.001%
Lead0.220%
Mercury0.140%

Average monthly Lake Forest temperature with heat index

Lake Forest monthly precipitation with daily maximum

Lake Forest monthly snow depth with daily maximum

Lake Forest monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Anaheim, CA346,7768570%
Dana Point, CA34,0098570%
Laguna Hills, CA31,1278570%
Las Flores, CA5,6718570%
North Tustin, CA26,2088570%
Lake Forest, CA80,6588570%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Largo, FL80,6784314%
Avondale, AZ80,6317448%
Bryan, TX80,5523922%
Fayetteville, AR80,5523922%
Cranston, RI80,8824510%
Lake Forest, CA80,6588570%
Source: The Lake Forest, 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.