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Julian Average Weather

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
January34°F65°F49°F10.5"
February39°F65°F51°F8.0"
March41°F70°F54°F3.0"
April41°F72°F55°F2.9"
May48°F77°F61°F0.9"
June49°F83°F65°F0.2"
July56°F91°F72°F1.5"
August58°F92°F73°F0.5"
September50°F86°F67°F0.4"
October47°F79°F62°F2.1"
November42°F75°F57°F3.5"
December34°F67°F50°F2.5"

Did you know?

  • The highest monthly average temperature in Julian for August is 73 degrees.
  • The lowest monthly average temperature in Julian for January is 49 degrees.
  • The most monthly precipitation in Julian occurs in January with 10.5 inches.
  • The air quality index in Julian is 22% worse than the national average.
  • The pollution index in Julian is 96% better than the national average.

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Compare Julian, CA Weather To Other Cities

Julian 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.
IndexJulianCaliforniaNational
Air quality index615550
Pollution index162,74018,106,7265,066,862

Julian air quality information

MeasurementTotal
Days measured365
Days with good air quality69
Days with moderate air quality277
Days w/ poor A.Q. for sensitive groups17
Days with unhealthy air quality1

Julian air quality information

PollutantTotal
Arsenic0.000%
Benzene0.003%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Julian temperature with heat index

Julian monthly precipitation with daily maximum

Julian monthly snow depth with daily maximum

Julian monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Borrego Springs, CA2,3286122%
Descanso, CA1,2876122%
Mount Laguna, CA136122%
San Diego Country Estates, CA10,5476122%
Julian, CA1,0106122%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Doniphan, NE1,010265430%
Heritage Creek, KY1,0105510%
Belfast, PA1,0103922%
Topeka, IN1,010468%
Marlborough, NH1,0093628%
Julian, CA1,0106122%
Source: The Julian, 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.