Frost Dates for Glacier Bay, AK

Elevation: 14 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. May 6
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 10

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 13
First Fall Frost October 1

Hard Freeze (28°F)

Last Spring Hard Freeze April 20
First Fall Hard Freeze October 28
58.46°N, 135.87°W © OpenStreetMap

Growing Season

157 Days May 6 to October 10

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 7a

Avg. annual minimum: 0 to 5°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

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°26°
February34°30°26°
March37°32°28°
April46°39°33°
May54°47°39°
June59°52°45°
July61°55°49°
August60°54°48°
September54°48°43°
October45°41°37°
November37°33°30°
December33°30°27°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January6.1
February4.1
March3.5
April3.2
May3.9
June3.5
July4.3
August6.2
September7.6
October7.1
November6.1
December6.1

Sunrise / Sunset

Daylight Longest: 17h 60m · Shortest: 6h 00m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:37 AM3:23 PM6h 45m
February7:31 AM4:29 PM8h 59m
March6:18 AM5:42 PM11h 23m
April4:57 AM7:03 PM14h 05m
May3:45 AM8:15 PM16h 29m
June3:02 AM8:58 PM17h 57m
July3:20 AM8:40 PM17h 20m
August4:26 AM7:34 PM15h 08m
September5:46 AM6:14 PM12h 29m
October7:04 AM4:56 PM9h 52m
November8:18 AM3:42 PM7h 24m
December8:59 AM3:01 PM6h 03m

Nearby Stations

Gustavus, AKMay 30 - September 16 Gustavus 2 Ne, AK May 28 - September 25 Elfin Cove, AK April 26 - November 1 Hoonah, AKMay 9 - October 4 Pelican, AKMay 4 - October 19 Juneau Lena Pt, AK April 11 - November 1

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