Frost Dates for Winter Gardens, CA
Based on data from El Cajon weather station, 2 miles away
Elevation: 676 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.
January 6
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 21
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
January 21
First Fall Frost
December 12
Hard Freeze (28°F)
Last Spring Hard Freeze
December 31
First Fall Hard Freeze
December 30
Growing Season
350 Days
January 6 to December 21
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 10a
Avg. annual minimum: 30 to 35°F
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
BSh
Hot Semi-Arid (Steppe)
Hot with low but not negligible rainfall. Less extreme than true desert. Dryland farming techniques and drought-tolerant varieties work well. Mulching and water conservation are key.
Temperature
40°
60°
80°
Avg High
Avg Temp
Avg Low
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 69° | 56° | 43° |
| February | 69° | 57° | 44° |
| March | 71° | 60° | 48° |
| April | 75° | 63° | 51° |
| May | 76° | 66° | 56° |
| June | 81° | 70° | 59° |
| July | 86° | 75° | 63° |
| August | 89° | 77° | 65° |
| September | 87° | 75° | 62° |
| October | 81° | 68° | 56° |
| November | 75° | 61° | 47° |
| December | 69° | 55° | 42° |
Precipitation
0"
2"
4"
6"
7.3"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 7.3 |
| February | 5.2 |
| March | 5.2 |
| April | 2.7 |
| May | 0.0 |
| June | 0.0 |
| July | 0.0 |
| August | 0.0 |
| September | 0.0 |
| October | 0.0 |
| November | 3.0 |
| December | 6.6 |
Sunrise / Sunset
Daylight
Pacific Time (PT)
Longest: 14h 10m · Shortest: 9h 50m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 6:55 AM | 4:59 PM | 10h 04m |
| February | 6:37 AM | 5:27 PM | 10h 50m |
| March | 7:05 AM | 6:50 PM | 11h 45m |
| April | 6:23 AM | 7:12 PM | 12h 49m |
| May | 5:53 AM | 7:35 PM | 13h 41m |
| June | 5:43 AM | 7:52 PM | 14h 09m |
| July | 5:54 AM | 7:52 PM | 13h 58m |
| August | 6:16 AM | 7:28 PM | 13h 13m |
| September | 6:36 AM | 6:48 PM | 12h 11m |
| October | 6:58 AM | 6:08 PM | 11h 10m |
| November | 6:25 AM | 4:41 PM | 10h 17m |
| December | 6:48 AM | 4:39 PM | 9h 51m |
Nearby Stations
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