Frost Dates for Kotzebue, AK

Based on data from Kotzebue Ralph Wein AP weather station, 2 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. June 5
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. September 24
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 June 10
First Fall Frost September 17

Hard Freeze (28°F)

Last Spring Hard Freeze May 27
First Fall Hard Freeze October 3
66.90°N, -162.60°W © OpenStreetMap

Growing Season

111 Days June 5 to September 24

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 3a

Avg. annual minimum: −40 to −35°F (−40 to −37°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

-10° 10° 30° 50° 70°
-2°
High: 5°F
Avg: -2°F
Low: -8°F
Jan
1°
High: 9°F
Avg: 1°F
Low: -6°F
Feb
2°
High: 9°F
Avg: 2°F
Low: -6°F
Mar
16°
High: 24°F
Avg: 16°F
Low: 9°F
Apr
33°
High: 39°F
Avg: 33°F
Low: 27°F
May
48°
High: 53°F
Avg: 48°F
Low: 42°F
Jun
55°
High: 60°F
Avg: 55°F
Low: 51°F
Jul
52°
High: 57°F
Avg: 52°F
Low: 48°F
Aug
43°
High: 48°F
Avg: 43°F
Low: 39°F
Sep
27°
High: 31°F
Avg: 27°F
Low: 23°F
Oct
11°
High: 16°F
Avg: 11°F
Low: 6°F
Nov
2°
High: 9°F
Avg: 2°F
Low: -4°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 2.5"
1.2"
1.24"
Jan
1.1"
1.12"
Feb
1.2"
1.24"
Mar
1.2"
1.20"
Apr
1.3"
1.30"
May
1.6"
1.64"
Jun
2.2"
2.24"
Jul
2.5"
2.48"
Aug
2.0"
1.99"
Sep
1.6"
1.57"
Oct
1.3"
1.25"
Nov
1.2"
1.24"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec3h7.5h11h15h19h24h21h16.5h12.5h9h5h0h
Jan: 10:23 AM – 1:37 PM · 3h 15m
Feb: 8:14 AM – 3:46 PM · 7h 31m
Mar: 6:26 AM – 5:34 PM · 11h 07m
Apr: 4:29 AM – 7:31 PM · 15h 03m
May: 2:29 AM – 9:31 PM · 19h 02m
Jun: 24h (Midnight Sun)
Jul: 1:31 AM – 10:29 PM · 20h 59m
Aug: 3:40 AM – 8:20 PM · 16h 40m
Sep: 5:39 AM – 6:21 PM · 12h 42m
Oct: 7:33 AM – 4:27 PM · 8h 53m
Nov: 9:37 AM – 2:23 PM · 4h 45m
Dec: 0h (Polar Night)
Daylight Longest: 24h 00m · Shortest: 0h 00m

Nearby Stations

Deering AP, AK

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