TODAY MAY17
TEMPERATURE43
HUMIDITY100
PRESSURE
WIND COND.240 19.3
  • 5546Mon20%
  • 6649Tue
  • 6846Wed
  • 5941Thu
  • 5943Fri
daynightWeather update from JULIAN at

Key findings

  • The highest monthly average temperature in Julian for August is 73.5 degrees
  • The lowest monthly average temperature in Julian for January is 49.1 degrees
  • The most monthly precipitation in Julian occurs in January with 10.5 inches
  • The air quality index in Julian is 29% worse than the national average
  • The pollution index in Julian is 97% better than the national average

Compare Julian, CA Weather

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      Julian 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
      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"

      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 index645550
      Pollution index162,74018,106,7265,066,862

      Julian air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality87
      Days with moderate air quality253
      Days w/ poor A.Q. for sensitive groups23
      Days with unhealthy air quality2

      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, CA2,3286428%
      Descanso, CA1,2876428%
      Mount Laguna, CA136428%
      San Diego Country Estates, CA10,5476428%
      Julian, CA1,0106428%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Heritage Creek, KY1,010492%
      Belfast, PA1,0103432%
      Topeka, IN1,0103726%
      Doniphan, NE1,0101962%
      West Kennebunk, ME1,0114020%
      Julian, CA1,0106428%
      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.