Frost Dates for Healy, AK

Elevation: 432 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 27
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 1

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 June 1
First Fall Frost August 26

Hard Freeze (28°F)

Last Spring Hard Freeze May 12
First Fall Hard Freeze September 13
63.87°N, 148.99°W © OpenStreetMap

Growing Season

97 Days May 27 to September 1

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 3a

Avg. annual minimum: −40 to −35°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
January8°0°-9°
February18°8°-2°
March24°13°2°
April41°31°22°
May56°45°35°
June67°56°45°
July67°58°49°
August62°53°44°
September51°43°35°
October33°26°18°
November16°8°1°
December12°3°-6°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January1.2
February1.1
March1.3
April1.8
May2.6
June3.2
July3.6
August3.7
September3.0
October2.0
November1.5
December1.3

Sunrise / Sunset

Daylight Longest: 20h 17m · Shortest: 3h 43m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January9:30 AM2:30 PM4h 60m
February7:55 AM4:05 PM8h 10m
March6:23 AM5:37 PM11h 14m
April4:41 AM7:19 PM14h 38m
May3:04 AM8:56 PM17h 51m
June1:54 AM10:06 PM20h 12m
July2:26 AM9:34 PM19h 08m
August3:60 AM8:00 PM16h 00m
September5:42 AM6:18 PM12h 36m
October7:21 AM4:39 PM9h 19m
November9:00 AM2:60 PM5h 60m
December10:06 AM1:54 PM3h 48m

Nearby Stations

Mckinley Park, AK June 6 - August 25 Kobe Hill, AKMay 24 - September 2 Clear Sky, AKMay 24 - September 4 Cantwell 2 E, AK Nenana Muni AP, AK May 15 - September 11 Fairbanks Intl AP, AK May 13 - September 13

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