Frost Dates for Julian, CA

Based on data from Julian Cdf weather station, 1 miles away

Elevation: 4222 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. March 27
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. December 1

30% Probability

Only a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.
Last Spring Frost April 11
First Fall Frost November 20

Hard Freeze (28°F)

Last Spring Hard Freeze February 13
First Fall Hard Freeze December 22
33.08°N, 116.60°W © OpenStreetMap

Growing Season

249 Days March 27 to December 1

USDA Hardiness Zone

Hardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.
Zone 9a

Avg. annual minimum: 20 to 25°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Csa Hot-Summer Mediterranean

Hot, dry summers and mild, wet winters. Classic Mediterranean climate ideal for grapes, olives, tomatoes, and herbs. Summer irrigation is usually necessary.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January53°46°39°
February54°47°39°
March58°49°41°
April62°53°43°
May69°58°47°
June79°67°55°
July86°74°63°
August86°74°62°
September81°69°57°
October71°60°50°
November60°52°43°
December52°45°38°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January11.7
February10.7
March10.4
April6.7
May1.5
June0.0
July0.0
August0.0
September0.0
October2.4
November7.3
December10.7

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 14h 11m · Shortest: 9h 49m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January6:54 AM4:57 PM10h 03m
February6:36 AM5:26 PM10h 49m
March7:03 AM6:49 PM11h 45m
April6:22 AM7:11 PM12h 50m
May5:51 AM7:34 PM13h 42m
June5:41 AM7:52 PM14h 10m
July5:52 AM7:51 PM13h 59m
August6:14 AM7:27 PM13h 14m
September6:35 AM6:47 PM12h 12m
October6:57 AM6:06 PM11h 09m
November6:24 AM4:39 PM10h 15m
December6:47 AM4:37 PM9h 49m

Nearby Stations

Cuyamaca, CAApril 19 - October 27 Henshaw Dam, CA April 18 - October 26 Borrego Desert Park, CA January 10 - January 1 Mt Laguna #3, CA April 22 - November 8 El Capitan Dam, CA March 19 - December 8 Ramona Fire Dept, CA March 4 - December 4

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