Frost Dates for Mukilteo, WA

Based on data from Everett Snohomish AP weather station, 3 miles away

Elevation: 105 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 9
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 17

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 17
First Fall Frost November 10

Hard Freeze (28°F)

Last Spring Hard Freeze February 13
First Fall Hard Freeze December 6
47.94°N, 122.30°W © OpenStreetMap

Growing Season

253 Days March 9 to November 17

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.
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
January46°41°37°
February48°42°37°
March52°45°39°
April56°49°43°
May63°55°48°
June66°59°51°
July72°64°55°
August73°64°55°
September68°60°52°
October58°52°46°
November50°45°40°
December45°40°36°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.2
February3.4
March3.6
April2.7
May2.5
June2.1
July1.7
August2.0
September1.8
October2.7
November4.3
December4.7

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 50m · Shortest: 8h 10m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January8:01 AM4:36 PM8h 36m
February7:24 AM5:23 PM9h 59m
March7:31 AM7:06 PM11h 35m
April6:27 AM7:52 PM13h 25m
May5:37 AM8:34 PM14h 57m
June5:15 AM9:03 PM15h 48m
July5:31 AM8:58 PM15h 27m
August6:10 AM8:16 PM14h 06m
September6:54 AM7:13 PM12h 20m
October7:37 AM6:11 PM10h 34m
November7:25 AM4:24 PM8h 59m
December7:59 AM4:11 PM8h 12m

Nearby Stations

Everett, WAMarch 24 - November 2 Monroe, WAApril 17 - October 23 Seattle Sand Pt Wsfo, WA March 8 - November 23 Arlington, WA April 22 - October 19 Seattle Boeing Fld, WA March 13 - November 17 Startup 1 E, WA April 15 - October 25

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