Frost Dates for Thorne Bay, AK

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. May 1
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 13
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 May 5
First Fall Frost October 7

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze April 11
First Fall Hard Freeze October 30
55.69°N, -132.52°W © OpenStreetMap

Growing Season

165 Days May 1 to October 13

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 7b

Learn more

Temperature

20° 40° 60°
33°
High: 38°
Avg: 33°
Low: 28°
Jan
34°
High: 40°
Avg: 34°
Low: 28°
Feb
36°
High: 43°
Avg: 36°
Low: 30°
Mar
42°
High: 50°
Avg: 42°
Low: 34°
Apr
49°
High: 57°
Avg: 49°
Low: 40°
May
54°
High: 63°
Avg: 54°
Low: 46°
Jun
58°
High: 66°
Avg: 58°
Low: 51°
Jul
58°
High: 65°
Avg: 58°
Low: 50°
Aug
52°
High: 59°
Avg: 52°
Low: 45°
Sep
44°
High: 51°
Avg: 44°
Low: 38°
Oct
37°
High: 42°
Avg: 37°
Low: 32°
Nov
34°
High: 38°
Avg: 34°
Low: 30°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 3" 6" 9" 11.7"
8.0"
7.96"
Jan
6.7"
6.74"
Feb
6.7"
6.70"
Mar
5.3"
5.35"
Apr
4.8"
4.80"
May
4.0"
3.99"
Jun
4.5"
4.52"
Jul
6.3"
6.34"
Aug
9.2"
9.24"
Sep
11.7"
11.70"
Oct
10.8"
10.83"
Nov
9.4"
9.42"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec7h9h11h14h16h17h17h15h12h10h8h7h
Jan: 8:19 AM – 3:41 PM · 7h 22m
Feb: 7:21 AM – 4:39 PM · 9h 18m
Mar: 6:17 AM – 5:43 PM · 11h 27m
Apr: 5:04 AM – 6:56 PM · 13h 53m
May: 4:00 AM – 7:60 PM · 15h 59m
Jun: 3:23 AM – 8:37 PM · 17h 13m
Jul: 3:39 AM – 8:21 PM · 16h 42m
Aug: 4:36 AM – 7:24 PM · 14h 49m
Sep: 5:47 AM – 6:13 PM · 12h 26m
Oct: 6:57 AM – 5:03 PM · 10h 05m
Nov: 8:02 AM – 3:58 PM · 7h 55m
Dec: 8:37 AM – 3:23 PM · 6h 46m
Daylight Longest: 17h 16m · Shortest: 6h 44m

Nearby Stations

Klawock AP, AK April 29 - October 16 Craig, AKApril 14 - November 1 Ketchikan 10n, AK April 20 - October 26 Ketchikan Intl AP, AK April 22 - October 23 Beaver Falls, AK April 4 - November 9 Wrangell AP, AK April 11 - November 1

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