Frost Dates for Carnegie, 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. July 24
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 18
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 July 31
First Fall Frost June 15
-25.80°N, 122.98°W © OpenStreetMap

Growing Season

329 Days July 24 to June 18

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 10a

Avg. annual minimum: 30 to 35°F (−1 to 2°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: 20°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: 8°C
Aug
20°
High: 29°C
Avg: 20°C
Low: 12°C
Sep
25°
High: 33°C
Avg: 25°C
Low: 17°C
Oct
28°
High: 36°C
Avg: 28°C
Low: 19°C
Nov
30°
High: 38°C
Avg: 30°C
Low: 22°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 20 mm 40 mm 60 mm 80 mm
56 mm
55.9 mm
Jan
71 mm
71.1 mm
Feb
25 mm
25.4 mm
Mar
20 mm
20.3 mm
Apr
10 mm
10.2 mm
May
13 mm
12.7 mm
Jun
8 mm
7.6 mm
Jul
0 mm
0.0 mm
Aug
0 mm
0.0 mm
Sep
0 mm
0.0 mm
Oct
8 mm
7.6 mm
Nov
30 mm
30.5 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec13.5h13h12h11.5h10.5h10.5h10.5h11h12h12.5h13.5h13.5h
Jan: 5:17 AM – 6:43 PM · 13h 27m
Feb: 5:34 AM – 6:26 PM · 12h 52m
Mar: 5:55 AM – 6:05 PM · 12h 11m
Apr: 6:18 AM – 5:42 PM · 11h 23m
May: 6:38 AM – 5:22 PM · 10h 44m
Jun: 6:48 AM – 5:12 PM · 10h 24m
Jul: 6:44 AM – 5:16 PM · 10h 32m
Aug: 6:27 AM – 5:33 PM · 11h 06m
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 17m
Dec: 5:12 AM – 6:48 PM · 13h 36m
Daylight Longest: 13h 37m · Shortest: 10h 23m

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