Frost Dates for Warburton Airfield, WA

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. August 7
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. June 19
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 August 13
First Fall Frost June 15
-26.13°N, 126.58°W © OpenStreetMap

Growing Season

316 Days August 7 to June 19

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 9b

Avg. annual minimum: 25 to 30°F (−4 to −1°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

5° 15° 25° 35°
31°
High: 38°C
Avg: 31°C
Low: 24°C
Jan
30°
High: 37°C
Avg: 30°C
Low: 23°C
Feb
27°
High: 34°C
Avg: 27°C
Low: 21°C
Mar
23°
High: 30°C
Avg: 23°C
Low: 16°C
Apr
18°
High: 25°C
Avg: 18°C
Low: 11°C
May
14°
High: 21°C
Avg: 14°C
Low: 7°C
Jun
14°
High: 21°C
Avg: 14°C
Low: 6°C
Jul
16°
High: 24°C
Avg: 16°C
Low: 7°C
Aug
20°
High: 29°C
Avg: 20°C
Low: 12°C
Sep
25°
High: 33°C
Avg: 25°C
Low: 17°C
Oct
27°
High: 35°C
Avg: 27°C
Low: 20°C
Nov
29°
High: 37°C
Avg: 29°C
Low: 22°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 20 mm 40 mm 60 mm
41 mm
40.6 mm
Jan
43 mm
43.2 mm
Feb
30 mm
30.5 mm
Mar
13 mm
12.7 mm
Apr
5 mm
5.1 mm
May
8 mm
7.6 mm
Jun
3 mm
2.5 mm
Jul
0 mm
0.0 mm
Aug
3 mm
2.5 mm
Sep
18 mm
17.8 mm
Oct
30 mm
30.5 mm
Nov
51 mm
50.8 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec13.5h13h12h11.5h10.5h10.5h10.5h11h12h12.5h13.5h13.5h
Jan: 5:16 AM – 6:44 PM · 13h 28m
Feb: 5:33 AM – 6:27 PM · 12h 53m
Mar: 5:54 AM – 6:06 PM · 12h 11m
Apr: 6:19 AM – 5:41 PM · 11h 23m
May: 6:38 AM – 5:22 PM · 10h 43m
Jun: 6:49 AM – 5:11 PM · 10h 22m
Jul: 6:45 AM – 5:15 PM · 10h 31m
Aug: 6:28 AM – 5:32 PM · 11h 05m
Sep: 6:04 AM – 5:56 PM · 11h 51m
Oct: 5:41 AM – 6:19 PM · 12h 38m
Nov: 5:21 AM – 6:39 PM · 13h 18m
Dec: 5:11 AM – 6:49 PM · 13h 38m
Daylight Longest: 13h 38m · Shortest: 10h 22m

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