Frost Dates for Julian, CA

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

Frost Dates

Last Spring Frost (50%) iA 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%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. December 1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 iHardiness 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 (−7 to −4°C)

Learn more

Köppen Climate iThe 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

30° 50° 70° 90°
46°
High: 53°F
Avg: 46°F
Low: 39°F
Jan
47°
High: 54°F
Avg: 47°F
Low: 39°F
Feb
49°
High: 58°F
Avg: 49°F
Low: 41°F
Mar
53°
High: 62°F
Avg: 53°F
Low: 43°F
Apr
58°
High: 69°F
Avg: 58°F
Low: 47°F
May
67°
High: 79°F
Avg: 67°F
Low: 55°F
Jun
74°
High: 86°F
Avg: 74°F
Low: 63°F
Jul
74°
High: 86°F
Avg: 74°F
Low: 62°F
Aug
69°
High: 81°F
Avg: 69°F
Low: 57°F
Sep
60°
High: 71°F
Avg: 60°F
Low: 50°F
Oct
52°
High: 60°F
Avg: 52°F
Low: 43°F
Nov
45°
High: 52°F
Avg: 45°F
Low: 38°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 3" 6" 9" 11.7"
11.7"
11.70"
Jan
10.7"
10.67"
Feb
10.4"
10.40"
Mar
6.7"
6.71"
Apr
1.5"
1.54"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
2.4"
2.40"
Oct
7.3"
7.29"
Nov
10.7"
10.72"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec10h11h12h13h13.5h14h14h13h12h11h10.5h10h
Jan: 6:59 AM – 5:01 PM · 10h 03m
Feb: 6:35 AM – 5:25 PM · 10h 49m
Mar: 6:07 AM – 5:53 PM · 11h 45m
Apr: 5:35 AM – 6:25 PM · 12h 50m
May: 5:09 AM – 6:51 PM · 13h 42m
Jun: 4:55 AM – 7:05 PM · 14h 10m
Jul: 5:00 AM – 6:60 PM · 13h 59m
Aug: 5:23 AM – 6:37 PM · 13h 14m
Sep: 5:54 AM – 6:06 PM · 12h 12m
Oct: 6:25 AM – 5:35 PM · 11h 09m
Nov: 6:52 AM – 5:08 PM · 10h 15m
Dec: 7:05 AM – 4:55 PM · 9h 49m
Daylight Longest: 14h 11m · Shortest: 9h 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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