Frost Dates for Anchorage Upper De Armoun, AK

Elevation: 407 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 7
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. September 28

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 14
First Fall Frost September 24

Hard Freeze (28°F)

Last Spring Hard Freeze April 24
First Fall Hard Freeze October 8
61.10°N, 149.72°W © OpenStreetMap

Growing Season

144 Days May 7 to September 28

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 6a

Avg. annual minimum: −10 to −5°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsc Subarctic (Dry Summer)

Cool, dry summers and cold winters. A rare climate found at high elevations. Very short growing season for cold-tolerant crops only.

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
January28°21°14°
February31°24°17°
March33°26°18°
April44°37°29°
May55°46°38°
June61°53°45°
July65°57°49°
August63°56°48°
September54°48°41°
October42°36°30°
November31°25°19°
December29°23°17°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January3.4
February3.3
March2.8
April2.1
May2.1
June1.7
July2.1
August3.1
September3.6
October3.4
November2.8
December4.2

Sunrise / Sunset

Daylight Longest: 18h 54m · Shortest: 5h 06m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:59 AM3:01 PM6h 01m
February7:41 AM4:19 PM8h 37m
March6:20 AM5:40 PM11h 19m
April4:50 AM7:10 PM14h 20m
May3:28 AM8:32 PM17h 04m
June2:35 AM9:25 PM18h 51m
July2:58 AM9:02 PM18h 05m
August4:14 AM7:46 PM15h 31m
September5:44 AM6:16 PM12h 32m
October7:11 AM4:49 PM9h 37m
November8:36 AM3:24 PM6h 48m
December9:26 AM2:34 PM5h 09m

Nearby Stations

Glen Alps, AK May 18 - September 23 Anchorage Rabbit Creek #2, AK May 12 - September 26 Campbell Creek Sci Ctr, AK May 28 - September 12 Ft Richardson Wtp, AK May 9 - September 26 Anchorage Merrill Fld, AK May 1 - September 29 Anchorage Forecast Office, AK May 5 - September 29

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