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Julian (CA) Climate by Month

The climate in Julian is marked by big temperature swings throughout the year. Temperatures range from very warm during the warmest months to cold in the cooler months. It receives a moderate amount of precipitation. Let’s explore the climate details in depth to provide you with a complete overview.

Average day and night temperature

In Julian, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C in July to a chilly 12°C in December. Nighttime temperatures can drop, with averages reaching 3°C in December.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

On average, Julian receives a reasonable amount of rain/snowfall, with an annual precipitation of 534 mm. The seasons in Julian, bring significant changes in precipitation. The wettest month, December, receives high rainfall, with an average of 132 mm of precipitation. This rainfall is distributed across 10 rainy days. In contrast, the driest month, June, experiences much less rainfall, totaling 0.5 mm over 0 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Julian enjoys sunny spells year-round. July sees up to 10.1 hours of daily sunshine, perfect for a sunny trip. February, the least sunny month, still offers a generous 7.7 hours of sun despite this cloudier time of the year.

Monthly hours of sunshine

Data from: San Diego, the United States of America (66 KM, 41 Miles).

Daily hours of sunshine

Data from: San Diego, the United States of America (66 KM, 41 Miles).

The best time of year to visit Julian in the United States of America

During the months of May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Julian?
    The hottest season / summer takes place in June, July, August and September.
  • Does Julian have a dry season?
    Yes, the months of May, June, July, August and September are very dry.
  • Which is the warmest month in Julian?
    July has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Julian?
    The coldest month is December with an average maximum temperature of 12°C.
  • Which is the wettest month in Julian?
    December tops the wettest month list with 132 mm of rainfall.
  • Which is the driest month in Julian?
    June is the driest month with 1 mm of precipitation.
  • Which is the sunniest month in Julian?
    July is the sunniest month with an average of 304 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Julian (CA)

    Sat   Nov 23
    18°C | 3°C
    W 18 km/h
    almost clear and no rain

    almost clear and no rain

    Sun   Nov 24
    15°C | 4°C
    W 18 km/h
    partly cloudy and no rain

    partly cloudy and no rain

    Mon   Nov 25
    21°C | 4°C
    W 14 km/h
    almost clear and no rain

    almost clear and no rain