Frost Dates for West Valley, WA

Based on data from Yakima #2 weather station, 2 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. April 8
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. October 23
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 April 18
First Fall Frost October 17

Hard Freeze (28°F)

Last Spring Hard Freeze March 16
First Fall Hard Freeze November 3
46.59°N, -120.61°W © OpenStreetMap

Growing Season

198 Days April 8 to October 23

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 7a

Avg. annual minimum: 0 to 5°F (−18 to −15°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

Köppen climate map

Temperature

20° 40° 60° 80°
33°
High: 40°F
Avg: 33°F
Low: 27°F
Jan
39°
High: 48°F
Avg: 39°F
Low: 30°F
Feb
46°
High: 57°F
Avg: 46°F
Low: 34°F
Mar
53°
High: 65°F
Avg: 53°F
Low: 40°F
Apr
61°
High: 74°F
Avg: 61°F
Low: 48°F
May
67°
High: 80°F
Avg: 67°F
Low: 54°F
Jun
74°
High: 88°F
Avg: 74°F
Low: 60°F
Jul
73°
High: 88°F
Avg: 73°F
Low: 59°F
Aug
65°
High: 79°F
Avg: 65°F
Low: 51°F
Sep
52°
High: 64°F
Avg: 52°F
Low: 40°F
Oct
40°
High: 49°F
Avg: 40°F
Low: 32°F
Nov
32°
High: 38°F
Avg: 32°F
Low: 26°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 2.2"
2.2"
2.16"
Jan
1.8"
1.77"
Feb
1.9"
1.87"
Mar
1.4"
1.37"
Apr
1.4"
1.43"
May
1.3"
1.30"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.6"
0.60"
Sep
1.4"
1.42"
Oct
1.6"
1.64"
Nov
2.2"
2.17"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15.5h14h12.5h10.5h9h8.5h
Jan: 7:37 AM – 4:23 PM · 8h 46m
Feb: 6:58 AM – 5:02 PM · 10h 04m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 21m
May: 4:36 AM – 7:24 PM · 14h 49m
Jun: 4:12 AM – 7:48 PM · 15h 37m
Jul: 4:21 AM – 7:39 PM · 15h 17m
Aug: 4:60 AM – 7:00 PM · 14h 00m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 38m
Nov: 7:26 AM – 4:34 PM · 9h 08m
Dec: 7:49 AM – 4:11 PM · 8h 23m
Daylight Longest: 15h 38m · Shortest: 8h 22m

Nearby Stations

Yakima Air Terminal, WA May 8 - October 4 Selah 2 Ne, WAMay 5 - October 4 Wapato, WAApril 21 - October 15 Moxee City 10 E, WA May 4 - October 10 Ellensburg, WAMay 8 - October 2 Sunnyside #2, WA April 30 - October 8

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