Frost Dates for Haines 40nw, AK

Elevation: 250 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 24
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 20

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 30
First Fall Frost September 13

Hard Freeze (28°F)

Last Spring Hard Freeze May 4
First Fall Hard Freeze October 4
59.45°N, 136.36°W © OpenStreetMap

Growing Season

119 Days May 24 to September 20

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 5b

Avg. annual minimum: −15 to −10°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
January23°17°12°
February29°22°14°
March35°26°17°
April46°36°27°
May58°46°35°
June66°55°43°
July68°58°48°
August66°56°46°
September56°48°40°
October44°37°31°
November30°25°19°
December24°20°15°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January6.3
February5.6
March5.6
April3.7
May2.9
June2.4
July2.2
August2.8
September4.1
October6.5
November7.7
December7.1

Sunrise / Sunset

Daylight Longest: 18h 18m · Shortest: 5h 42m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:45 AM3:15 PM6h 30m
February7:34 AM4:26 PM8h 51m
March6:19 AM5:41 PM11h 22m
April4:55 AM7:05 PM14h 11m
May3:39 AM8:21 PM16h 42m
June2:52 AM9:08 PM18h 15m
July3:12 AM8:48 PM17h 35m
August4:22 AM7:38 PM15h 16m
September5:45 AM6:15 PM12h 30m
October7:07 AM4:53 PM9h 47m
November8:24 AM3:36 PM7h 12m
December9:08 AM2:52 PM5h 44m

Nearby Stations

Pleasant Camp, BC May 27 - September 11 Haines AP, AK April 25 - October 12 Haines #2, AKApril 30 - October 7 Skagway AP, AK April 21 - October 17 Skagway, AKMay 6 - October 1 Blanchard River, YT June 23 - July 28

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