Frost Dates for Little Port Walter, AK

Elevation: 4 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 21
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 31

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 30
First Fall Frost October 22

Hard Freeze (28°F)

Last Spring Hard Freeze March 27
First Fall Hard Freeze November 22
56.38°N, 134.65°W © OpenStreetMap

Growing Season

193 Days April 21 to October 31

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 8a

Avg. annual minimum: 10 to 15°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
January38°34°31°
February39°35°31°
March41°36°32°
April47°41°36°
May54°47°41°
June58°52°46°
July61°56°50°
August61°56°51°
September56°52°47°
October49°45°41°
November43°39°35°
December39°36°32°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January24.9
February19.3
March17.2
April13.7
May11.9
June9.7
July9.6
August13.3
September20.3
October24.8
November24.4
December26.5

Sunrise / Sunset

Daylight Longest: 17h 26m · Shortest: 6h 34m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:23 AM3:37 PM7h 13m
February7:23 AM4:37 PM9h 14m
March6:17 AM5:43 PM11h 26m
April5:02 AM6:58 PM13h 56m
May3:57 AM8:03 PM16h 06m
June3:18 AM8:42 PM17h 23m
July3:35 AM8:25 PM16h 51m
August4:33 AM7:27 PM14h 53m
September5:47 AM6:13 PM12h 27m
October6:59 AM5:01 PM10h 02m
November8:06 AM3:54 PM7h 48m
December8:42 AM3:18 PM6h 36m

Nearby Stations

Port Alexander, AK April 18 - November 5 Pt Baker, AKApril 19 - October 25 Sitka 1 Ne, AKMay 3 - October 18 Sitka Airport, AK April 12 - November 1 Hidden Falls Hatchery, AK April 29 - October 25 Klawock AP, AK April 29 - October 16

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