Frost Dates for Granger, WA

Based on data from Sunnyside #2 weather station, 8 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 30
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 8
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 May 5
First Fall Frost October 3

Hard Freeze (28°F)

Last Spring Hard Freeze April 15
First Fall Hard Freeze October 22
46.34°N, -120.19°W © OpenStreetMap

Growing Season

161 Days April 30 to October 8

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.

BWk Cold Desert

Dry with hot summers and cold winters. Rainfall is minimal year-round. Short growing seasons and large temperature swings require careful timing. Cold-hardy, drought-tolerant plants are best suited.

Köppen climate map

Temperature

20° 40° 60° 80°
31°
High: 38°F
Avg: 31°F
Low: 24°F
Jan
36°
High: 46°F
Avg: 36°F
Low: 26°F
Feb
43°
High: 56°F
Avg: 43°F
Low: 30°F
Mar
50°
High: 64°F
Avg: 50°F
Low: 35°F
Apr
58°
High: 73°F
Avg: 58°F
Low: 43°F
May
64°
High: 80°F
Avg: 64°F
Low: 48°F
Jun
71°
High: 88°F
Avg: 71°F
Low: 54°F
Jul
70°
High: 87°F
Avg: 70°F
Low: 52°F
Aug
62°
High: 79°F
Avg: 62°F
Low: 45°F
Sep
50°
High: 64°F
Avg: 50°F
Low: 36°F
Oct
39°
High: 49°F
Avg: 39°F
Low: 28°F
Nov
31°
High: 38°F
Avg: 31°F
Low: 24°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 2.0"
1.8"
1.83"
Jan
1.6"
1.58"
Feb
1.9"
1.86"
Mar
1.6"
1.56"
Apr
2.0"
2.03"
May
1.6"
1.62"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.7"
0.65"
Sep
1.7"
1.73"
Oct
1.6"
1.62"
Nov
2.0"
1.99"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15.5h14h12.5h10.5h9h8.5h
Jan: 7:36 AM – 4:24 PM · 8h 47m
Feb: 6:57 AM – 5:03 PM · 10h 05m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 20m
May: 4:36 AM – 7:24 PM · 14h 47m
Jun: 4:13 AM – 7:47 PM · 15h 35m
Jul: 4:22 AM – 7:38 PM · 15h 15m
Aug: 5:00 AM – 6:60 PM · 13h 59m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 38m
Nov: 7:25 AM – 4:35 PM · 9h 09m
Dec: 7:48 AM – 4:12 PM · 8h 25m
Daylight Longest: 15h 36m · Shortest: 8h 24m

Nearby Stations

Sunnyside, WAMay 1 - October 6 Moxee City 10 E, WA May 4 - October 10 Prosser, WAApril 14 - October 22 Wapato, WAApril 21 - October 15 Priest Rapids Dam, WA March 24 - November 4 Bickleton, WAMay 16 - October 9

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