Frost Dates for Juneau, AK

Based on data from Juneau Dwtn weather station, 0 miles away

Elevation: 56 ft

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. April 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. October 22

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 April 26
First Fall Frost October 15

Hard Freeze (28°F)

Last Spring Hard Freeze April 2
First Fall Hard Freeze November 8
58.30°N, 134.42°W © OpenStreetMap

Growing Season

185 Days April 20 to October 22

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 7a

Avg. annual minimum: 0 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
January34°30°27°
February37°32°28°
March39°35°30°
April49°42°36°
May57°50°43°
June62°56°49°
July63°57°52°
August62°57°51°
September56°51°46°
October48°44°39°
November40°36°32°
December36°33°29°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January5.6
February4.4
March4.1
April3.6
May3.7
June3.4
July4.7
August7.1
September7.8
October7.4
November5.8
December5.7

Sunrise / Sunset

Daylight Alaska Time (AKT) Longest: 17h 57m · Shortest: 6h 03m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Alaska Time (AKT))
Month Sunrise Sunset Daylight
January8:43 AM3:31 PM6h 47m
February7:42 AM4:42 PM9h 00m
March7:26 AM6:49 PM11h 23m
April5:56 AM8:00 PM14h 05m
May4:40 AM9:08 PM16h 27m
June4:01 AM9:55 PM17h 54m
July4:25 AM9:42 PM17h 17m
August5:28 AM8:35 PM15h 07m
September6:38 AM7:07 PM12h 29m
October7:46 AM5:39 PM9h 53m
November7:60 AM3:26 PM7h 26m
December8:51 AM2:56 PM6h 06m

Nearby Stations

Eaglecrest Base, AK May 21 - October 1 Juneau Intl AP, AK May 4 - October 3 Juneau Forecast Office, AK May 9 - October 4 Auke Bay, AKApril 27 - October 18 Annex Creek, AKMay 3 - October 14 Juneau Lena Pt, AK April 11 - November 1

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