Frost Dates for Annette Island AP, AK

Elevation: 33 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 4
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 12
First Fall Frost October 25

Hard Freeze (28°F)

Last Spring Hard Freeze March 16
First Fall Hard Freeze November 18
55.04°N, 131.58°W © OpenStreetMap

Growing Season

210 Days April 4 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
January43°38°33°
February44°38°33°
March46°40°34°
April52°45°39°
May59°52°45°
June63°56°50°
July66°60°54°
August66°60°54°
September61°55°49°
October54°48°42°
November47°42°37°
December43°38°34°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January9.2
February7.8
March7.3
April6.2
May6.1
June5.5
July5.2
August7.7
September10.1
October12.1
November11.0
December9.9

Sunrise / Sunset

Daylight Longest: 17h 07m · Shortest: 6h 53m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:15 AM3:45 PM7h 29m
February7:19 AM4:41 PM9h 22m
March6:16 AM5:44 PM11h 28m
April5:05 AM6:55 PM13h 50m
May4:04 AM7:56 PM15h 53m
June3:28 AM8:32 PM17h 04m
July3:43 AM8:17 PM16h 35m
August4:38 AM7:22 PM14h 44m
September5:47 AM6:13 PM12h 25m
October6:56 AM5:04 PM10h 08m
November7:59 AM4:01 PM8h 02m
December8:32 AM3:28 PM6h 55m

Nearby Stations

Metlakatla 6 S, AK April 14 - October 25 Beaver Falls, AK April 4 - November 9 Ketchikan Intl AP, AK April 22 - October 23 Ketchikan 10n, AK April 20 - October 26 Grey Islet (Aut), BC March 3 - December 6 Green Island, BC March 2 - December 1

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