Frost Dates for Startup 1 E, WA

Elevation: 52 m

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. April 15
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. October 25

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 April 26
First Fall Frost October 17

Hard Freeze (28°F)

Last Spring Hard Freeze March 18
First Fall Hard Freeze November 12
47.87°N, 121.72°W © OpenStreetMap

Growing Season

193 Days April 15 to October 25

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 8b

Avg. annual minimum: 15 to 20°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Cfb Oceanic (Marine West Coast)

Mild year-round with cool summers and wet winters. Excellent for cool-season crops like brassicas, peas, and root vegetables. Extended harvest seasons but summer heat-loving crops may struggle.

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°41°34°
February51°42°34°
March55°45°36°
April60°50°39°
May67°56°44°
June71°60°49°
July78°65°52°
August78°65°51°
September73°60°47°
October62°52°42°
November52°45°37°
December47°40°34°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January8.2
February6.6
March7.0
April6.5
May6.3
June5.4
July3.9
August4.1
September5.7
October7.8
November9.1
December9.2

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 49m · Shortest: 8h 11m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:58 AM4:34 PM8h 36m
February7:22 AM5:21 PM9h 59m
March7:29 AM7:04 PM11h 35m
April6:25 AM7:49 PM13h 24m
May5:35 AM8:31 PM14h 57m
June5:13 AM9:01 PM15h 48m
July5:29 AM8:56 PM15h 27m
August6:08 AM8:14 PM14h 06m
September6:52 AM7:11 PM12h 20m
October7:35 AM6:09 PM10h 34m
November7:22 AM4:22 PM8h 59m
December7:57 AM4:09 PM8h 12m

Nearby Stations

Tolt S Fk Rsvr, WA April 13 - November 10 Baring, WAApril 14 - October 29 Monroe, WAApril 17 - October 23 Snoqualmie Falls, WA March 30 - November 7 Everett, WAMarch 24 - November 2 Everett Snohomish AP, WA March 9 - November 17

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