Frost Dates for Juneau, AK

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

Frost Dates

Last Spring Frost (50%) iA 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%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 22
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 iHardiness 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 (−18 to −15°C)

Learn more

Köppen Climate iThe 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

20° 40° 60°
30°
High: 34°F
Avg: 30°F
Low: 27°F
Jan
32°
High: 37°F
Avg: 32°F
Low: 28°F
Feb
35°
High: 39°F
Avg: 35°F
Low: 30°F
Mar
42°
High: 49°F
Avg: 42°F
Low: 36°F
Apr
50°
High: 57°F
Avg: 50°F
Low: 43°F
May
56°
High: 62°F
Avg: 56°F
Low: 49°F
Jun
57°
High: 63°F
Avg: 57°F
Low: 52°F
Jul
57°
High: 62°F
Avg: 57°F
Low: 51°F
Aug
51°
High: 56°F
Avg: 51°F
Low: 46°F
Sep
44°
High: 48°F
Avg: 44°F
Low: 39°F
Oct
36°
High: 40°F
Avg: 36°F
Low: 32°F
Nov
33°
High: 36°F
Avg: 33°F
Low: 29°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 7.8"
5.6"
5.57"
Jan
4.4"
4.41"
Feb
4.1"
4.12"
Mar
3.6"
3.61"
Apr
3.7"
3.71"
May
3.4"
3.37"
Jun
4.7"
4.66"
Jul
7.1"
7.09"
Aug
7.8"
7.79"
Sep
7.4"
7.38"
Oct
5.8"
5.83"
Nov
5.7"
5.74"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec7h9h11.5h14h16.5h18h17.5h15h12.5h10h7.5h6h
Jan: 8:36 AM – 3:24 PM · 6h 47m
Feb: 7:30 AM – 4:30 PM · 9h 00m
Mar: 6:18 AM – 5:42 PM · 11h 23m
Apr: 4:58 AM – 7:02 PM · 14h 05m
May: 3:46 AM – 8:14 PM · 16h 27m
Jun: 3:03 AM – 8:57 PM · 17h 54m
Jul: 3:21 AM – 8:39 PM · 17h 17m
Aug: 4:26 AM – 7:34 PM · 15h 07m
Sep: 5:46 AM – 6:14 PM · 12h 29m
Oct: 7:04 AM – 4:56 PM · 9h 53m
Nov: 8:17 AM – 3:43 PM · 7h 26m
Dec: 8:57 AM – 3:03 PM · 6h 06m
Daylight Longest: 17h 57m · Shortest: 6h 03m

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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