Frost Dates for Kirkland, WA

Based on data from Seattle Sand Pt Wsfo weather station, 2 miles away

Elevation: 154 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. March 8
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. November 23

30% Probability

Only 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 March 16
First Fall Frost November 15

Hard Freeze (28°F)

Last Spring Hard Freeze February 11
First Fall Hard Freeze December 11
47.68°N, 122.21°W © OpenStreetMap

Growing Season

260 Days March 8 to November 23

USDA Hardiness Zone

Hardiness 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

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Csb Warm-Summer Mediterranean

Warm, dry summers and mild, wet winters. Similar to hot-summer Mediterranean but cooler. Great for a wide range of vegetables and fruit trees with moderate water needs.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January47°42°37°
February50°43°37°
March54°47°39°
April59°51°43°
May65°57°48°
June70°61°53°
July77°67°57°
August77°67°57°
September71°62°53°
October61°54°47°
November52°46°41°
December47°42°37°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.9
February4.0
March4.1
April3.4
May3.3
June2.5
July2.2
August2.7
September3.3
October4.5
November4.9
December4.7

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 48m · Shortest: 8h 12m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:60 AM4:37 PM8h 37m
February7:24 AM5:23 PM9h 60m
March7:31 AM7:06 PM11h 35m
April6:27 AM7:51 PM13h 24m
May5:37 AM8:33 PM14h 56m
June5:16 AM9:02 PM15h 46m
July5:32 AM8:57 PM15h 25m
August6:11 AM8:16 PM14h 05m
September6:54 AM7:13 PM12h 19m
October7:37 AM6:11 PM10h 34m
November7:24 AM4:24 PM9h 01m
December7:58 AM4:12 PM8h 14m

Nearby Stations

Seattle Boeing Fld, WA March 13 - November 17 Renton Muni AP, WA March 13 - November 16 Everett Snohomish AP, WA March 9 - November 17 Monroe, WAApril 17 - October 23 Seattle Tacoma Intl AP, WA March 2 - November 23 Kent, WAMarch 20 - November 10

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