Julian (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Julian.
Climate overview of Julian
The climate in Julian, California, United States of America, is marked by large temperature swings across the seasons, ranging from 31°C (88°F) in July to 12°C (54°F) in December.
The city receives around 534 mm (21 in) of rain/snowfall per year. It experiences a distinct dry season from May to October, with very warm summers and cold winters. December is the wettest month and June the driest. Sunshine peaks in July, when the city sees around 10.1 hours of sunshine per day.
Julian Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Julian - and find the best time to visit.
Monthly Temperature in Julian
In Julian, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C (88°F) in July to a chilly 12°C (54°F) in December.
Nighttime temperatures range from 17°C (63°F) in July to 3°C (37°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Julian
On average, Julian receives a reasonable amount of rain/snowfall, with an annual precipitation of 534 mm (21 in). The seasons in Julian bring significant changes in precipitation. The wettest month, December, receives high rainfall, with an average of 132 mm (5.2 in) of precipitation. This rainfall is distributed across 10 rainy days.
In contrast, the driest month, June, experiences much less rainfall, totaling 0.5 mm (0.02 in) over 0 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Julian Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Julian
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.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Julian by Month
The relative humidity is high throughout the year in Julian.
The city experiences its highest humidity in July, reaching 75%. In January, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Julian
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, September and October
- Warmest weather: July and August
- Most sunshine: July and August
- Fewest rainy days: June
- Wettest months: January, February, March and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from May to October, with very warm summers and cold winters
Frequently asked questions about the climate in Julian
What is the best time to visit Julian?
May, June, September and October typically offer the most optimal weather in Julian. In contrast, December tends to have less optimal conditions. Julian has a distinct dry season from May to October, with very warm summers and cold winters.
What temperatures can I expect in Julian?
Daytime highs range from 12°C (54°F) in December to 31°C (88°F) in July. Nighttime lows range from 3°C (37°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Julian get?
Annual rainfall is around 534 mm (21 in). December is the wettest month with 132 mm (5.2 in), while June is the driest with 0.5 mm (0.02 in).
How sunny is Julian?
Julian receives around 3,069 hours of sunshine per year. July is the sunniest month with 304 hours, while February is the cloudiest with just 230 hours. Overall, Julian enjoys abundant sunshine.
Julian 3-Day Forecast
Julian on the map
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