Frost Dates for Fort Irwin, CA
Based on data from Barstow Daggett AP weather station, 29 miles away
Elevation: 2487 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.
February 19
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.
November 26
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
February 28
First Fall Frost
November 20
Hard Freeze (28°F)
Last Spring Hard Freeze
January 28
First Fall Hard Freeze
December 9
Growing Season
281 Days
February 19 to November 26
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
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
BWh
Hot Desert
Very hot and extremely dry with minimal rainfall. Irrigation is essential for any gardening. Heat-tolerant crops and desert-adapted plants thrive; shade structures help in peak summer.
Temperature
30°
50°
70°
90°
110°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 61° | 49° | 36° |
| February | 66° | 53° | 40° |
| March | 73° | 59° | 46° |
| April | 80° | 65° | 51° |
| May | 89° | 74° | 60° |
| June | 99° | 84° | 68° |
| July | 105° | 90° | 74° |
| August | 104° | 89° | 73° |
| September | 96° | 81° | 66° |
| October | 83° | 69° | 54° |
| November | 70° | 56° | 43° |
| December | 60° | 48° | 35° |
Precipitation
0"
1"
2"
3.0"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 3.0 |
| February | 2.5 |
| March | 1.1 |
| April | 0.0 |
| May | 0.0 |
| June | 0.0 |
| July | 0.0 |
| August | 0.0 |
| September | 0.0 |
| October | 0.0 |
| November | 0.0 |
| December | 1.0 |
Sunrise / Sunset
Daylight
Pacific Time (PT)
Longest: 14h 21m · Shortest: 9h 39m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 6:59 AM | 4:54 PM | 9h 54m |
| February | 6:40 AM | 5:24 PM | 10h 44m |
| March | 7:05 AM | 6:49 PM | 11h 44m |
| April | 6:21 AM | 7:14 PM | 12h 53m |
| May | 5:49 AM | 7:38 PM | 13h 50m |
| June | 5:37 AM | 7:57 PM | 14h 20m |
| July | 5:49 AM | 7:56 PM | 14h 07m |
| August | 6:12 AM | 7:31 PM | 13h 19m |
| September | 6:35 AM | 6:48 PM | 12h 12m |
| October | 6:59 AM | 6:05 PM | 11h 06m |
| November | 6:28 AM | 4:36 PM | 10h 08m |
| December | 6:53 AM | 4:33 PM | 9h 40m |
Nearby Stations
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