Frost Dates for Juneau Mile 17, AK

Elevation: 75 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. April 29
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 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 4
First Fall Frost October 14

Hard Freeze (28°F)

Last Spring Hard Freeze April 11
First Fall Hard Freeze November 7
58.41°N, 134.75°W © OpenStreetMap

Growing Season

174 Days April 29 to October 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 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
January33°29°25°
February35°31°27°
March39°33°28°
April47°40°34°
May57°49°41°
June62°55°48°
July63°57°51°
August63°57°51°
September56°51°45°
October47°43°38°
November38°34°31°
December35°32°28°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.9
February3.5
March3.0
April3.1
May3.7
June3.9
July5.2
August6.5
September7.3
October6.5
November5.3
December4.8

Sunrise / Sunset

Daylight Longest: 17h 59m · Shortest: 6h 01m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:37 AM3:23 PM6h 46m
February7:30 AM4:30 PM8h 59m
March6:18 AM5:42 PM11h 23m
April4:57 AM7:03 PM14h 05m
May3:46 AM8:14 PM16h 29m
June3:02 AM8:58 PM17h 56m
July3:21 AM8:39 PM17h 19m
August4:26 AM7:34 PM15h 08m
September5:46 AM6:14 PM12h 29m
October7:04 AM4:56 PM9h 52m
November8:17 AM3:43 PM7h 25m
December8:58 AM3:02 PM6h 04m

Nearby Stations

Juneau Lena Pt, AK April 11 - November 1 Auke Bay, AKApril 27 - October 18 Juneau Forecast Office, AK May 9 - October 4 Juneau Intl AP, AK May 4 - October 3 Eaglecrest Base, AK May 21 - October 1 Juneau Dwtn, AK April 20 - October 22

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