Frost Dates for Sterling 6sw, AK

Elevation: 89 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 20
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 21

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 15

Hard Freeze (28°F)

Last Spring Hard Freeze May 3
First Fall Hard Freeze September 30
60.49°N, 150.92°W © OpenStreetMap

Growing Season

124 Days May 20 to September 21

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 4b

Avg. annual minimum: −25 to −20°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
January22°15°8°
February28°20°12°
March33°24°15°
April46°37°28°
May56°46°35°
June63°54°44°
July66°58°49°
August64°56°47°
September55°47°40°
October42°35°28°
November28°22°15°
December23°17°10°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.5
February2.0
March1.8
April1.5
May1.6
June1.6
July2.2
August2.8
September2.5
October2.3
November2.3
December2.7

Sunrise / Sunset

Daylight Alaska Time (AKT) Longest: 18h 40m · Shortest: 5h 20m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Alaska Time (AKT))
Month Sunrise Sunset Daylight
January10:07 AM4:19 PM6h 12m
February8:57 AM5:40 PM8h 43m
March8:33 AM7:53 PM11h 20m
April6:56 AM9:12 PM14h 16m
May5:32 AM10:28 PM16h 56m
June4:46 AM11:22 PM18h 37m
July5:13 AM11:06 PM17h 53m
August6:25 AM9:51 PM15h 25m
September7:42 AM8:14 PM12h 31m
October8:58 AM6:39 PM9h 41m
November9:20 AM4:17 PM6h 57m
December10:18 AM3:41 PM5h 23m

Nearby Stations

Soldotna 5ssw, AK June 11 - September 1 Kenai Muni AP, AK May 24 - September 12 Kenai 9n, AKMay 18 - September 22 Kenai 29 Ene, AK June 1 - September 8 Cooper Landing 5 W, AK June 12 - September 1 Cooper Lake Project, AK May 18 - September 27

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