Frost Dates for Seward 19n, AK

Elevation: 158 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 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. September 26

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 25
First Fall Frost September 21

Hard Freeze (28°F)

Last Spring Hard Freeze May 3
First Fall Hard Freeze October 9
60.35°N, 149.35°W © OpenStreetMap

Growing Season

128 Days May 21 to September 26

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.
Dfc Subarctic

Short, cool summers and long, very cold winters. Growing seasons of 3–4 months require fast-maturing varieties. Root vegetables, potatoes, and cold-hardy greens are the most reliable.

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
January26°21°16°
February30°24°18°
March35°27°19°
April44°36°28°
May54°44°34°
June61°51°42°
July64°56°47°
August62°54°46°
September54°47°39°
October41°36°31°
November32°28°24°
December28°24°20°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.6
February3.5
March3.3
April2.7
May1.9
June2.0
July2.9
August4.3
September5.0
October4.6
November4.7
December4.4

Sunrise / Sunset

Daylight Longest: 18h 37m · Shortest: 5h 23m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:53 AM3:07 PM6h 15m
February7:38 AM4:22 PM8h 44m
March6:20 AM5:40 PM11h 20m
April4:52 AM7:08 PM14h 16m
May3:33 AM8:27 PM16h 54m
June2:43 AM9:17 PM18h 34m
July3:05 AM8:55 PM17h 51m
August4:18 AM7:42 PM15h 24m
September5:44 AM6:16 PM12h 31m
October7:09 AM4:51 PM9h 42m
November8:30 AM3:30 PM6h 59m
December9:17 AM2:43 PM5h 26m

Nearby Stations

Moose Pass 3nw, AK May 31 - September 8 Cooper Lake Project, AK May 18 - September 27 Seward 8 Nw, AK Seward AP, AKMay 2 - October 7 Cooper Landing 5 W, AK June 12 - September 1 Portage Glacier V C, AK May 27 - September 12

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