Frost Dates for Fort Irwin, CA

Based on data from Barstow Daggett AP weather station, 29 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. February 19
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. November 26
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 February 28
First Fall Frost November 20

Hard Freeze (28°F)

Last Spring Hard Freeze January 28
First Fall Hard Freeze December 9
35.26°N, -116.68°W © OpenStreetMap

Growing Season

281 Days February 19 to November 26

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.

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.

Köppen climate map

Temperature

30° 50° 70° 90° 110°
49°
High: 61°F
Avg: 49°F
Low: 36°F
Jan
53°
High: 66°F
Avg: 53°F
Low: 40°F
Feb
59°
High: 73°F
Avg: 59°F
Low: 46°F
Mar
65°
High: 80°F
Avg: 65°F
Low: 51°F
Apr
74°
High: 89°F
Avg: 74°F
Low: 60°F
May
84°
High: 99°F
Avg: 84°F
Low: 68°F
Jun
90°
High: 105°F
Avg: 90°F
Low: 74°F
Jul
89°
High: 104°F
Avg: 89°F
Low: 73°F
Aug
81°
High: 96°F
Avg: 81°F
Low: 66°F
Sep
69°
High: 83°F
Avg: 69°F
Low: 54°F
Oct
56°
High: 70°F
Avg: 56°F
Low: 43°F
Nov
48°
High: 60°F
Avg: 48°F
Low: 35°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 1" 2" 3.0"
3.0"
2.96"
Jan
2.5"
2.52"
Feb
1.1"
1.05"
Mar
0.0"
0.00"
Apr
0.0"
0.00"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
0.0"
0.00"
Oct
0.0"
0.00"
Nov
1.0"
1.00"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec10h10.5h11.5h13h14h14.5h14h13.5h12h11h10h9.5h
Jan: 7:03 AM – 4:57 PM · 9h 54m
Feb: 6:38 AM – 5:22 PM · 10h 44m
Mar: 6:08 AM – 5:52 PM · 11h 44m
Apr: 5:33 AM – 6:27 PM · 12h 53m
May: 5:05 AM – 6:55 PM · 13h 50m
Jun: 4:50 AM – 7:10 PM · 14h 20m
Jul: 4:56 AM – 7:04 PM · 14h 07m
Aug: 5:21 AM – 6:39 PM · 13h 19m
Sep: 5:54 AM – 6:06 PM · 12h 12m
Oct: 6:27 AM – 5:33 PM · 11h 06m
Nov: 6:56 AM – 5:04 PM · 10h 08m
Dec: 7:10 AM – 4:50 PM · 9h 40m
Daylight Longest: 14h 21m · Shortest: 9h 39m

Nearby Stations

Barstow, CA February 22 - November 23 Victorville, CA March 18 - November 11 Johnson Valley, CA March 1 - November 29 Hesperia 2e, CA February 28 - December 1 Big Bear Lake, CA May 27 - October 4 Lake Arrowhead, CA May 5 - November 2

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