Frost Dates for Stehekin 4 Nw, WA

Elevation: 383 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 27
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 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 May 2
First Fall Frost October 11

Hard Freeze (28°F)

Last Spring Hard Freeze April 4
First Fall Hard Freeze October 31
48.35°N, 120.73°W © OpenStreetMap

Growing Season

173 Days April 27 to October 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 7b

Avg. annual minimum: 5 to 10°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsb Warm-Summer Continental (Dry Summer)

Warm, dry summers and cold, snowy winters. Common in mountain regions. Moderate growing season with irrigation needs in summer.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January32°29°25°
February38°32°26°
March47°38°30°
April58°47°36°
May69°56°44°
June74°62°50°
July84°70°56°
August83°69°55°
September73°60°48°
October56°47°38°
November40°35°30°
December32°29°26°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January8.1
February6.4
March5.7
April3.3
May2.8
June2.7
July2.8
August2.8
September2.6
October5.3
November7.0
December8.2

Sunrise / Sunset

Daylight Longest: 15h 54m · Shortest: 8h 07m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:44 AM4:16 PM8h 32m
February7:02 AM4:58 PM9h 57m
March6:13 AM5:47 PM11h 35m
April5:17 AM6:43 PM13h 26m
May4:30 AM7:30 PM14h 60m
June4:04 AM7:56 PM15h 52m
July4:15 AM7:45 PM15h 31m
August4:56 AM7:04 PM14h 08m
September5:50 AM6:10 PM12h 20m
October6:44 AM5:16 PM10h 32m
November7:32 AM4:28 PM8h 56m
December7:56 AM4:04 PM8h 08m

Nearby Stations

Holden Village, WA May 25 - September 19 Mazama, WAMay 9 - September 29 Winthrop 1 Wsw, WA May 15 - September 22 Ross Dam, WAApril 8 - November 10 Diablo Dam, WA April 10 - November 1 Newhalem, WAApril 2 - November 14

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