Frost Dates for Bethel, AK

Based on data from Bethel AP weather station, 3 miles away

Elevation: 3 ft

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 21
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 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 May 28
First Fall Frost September 16

Hard Freeze (28°F)

Last Spring Hard Freeze May 11
First Fall Hard Freeze October 1
60.79°N, -161.76°W © OpenStreetMap

Growing Season

124 Days May 21 to September 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 4a

Avg. annual minimum: −30 to −25°F (−34 to −32°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

0° 20° 40° 60°
7°
High: 13°F
Avg: 7°F
Low: 1°F
Jan
13°
High: 20°F
Avg: 13°F
Low: 7°F
Feb
15°
High: 22°F
Avg: 15°F
Low: 7°F
Mar
29°
High: 37°F
Avg: 29°F
Low: 21°F
Apr
43°
High: 52°F
Avg: 43°F
Low: 34°F
May
53°
High: 62°F
Avg: 53°F
Low: 45°F
Jun
56°
High: 64°F
Avg: 56°F
Low: 49°F
Jul
54°
High: 61°F
Avg: 54°F
Low: 47°F
Aug
46°
High: 53°F
Avg: 46°F
Low: 39°F
Sep
32°
High: 38°F
Avg: 32°F
Low: 26°F
Oct
19°
High: 24°F
Avg: 19°F
Low: 13°F
Nov
10°
High: 16°F
Avg: 10°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" 3" 3.1"
1.3"
1.32"
Jan
1.4"
1.35"
Feb
1.2"
1.24"
Mar
1.2"
1.20"
Apr
1.6"
1.61"
May
2.1"
2.15"
Jun
2.7"
2.74"
Jul
3.1"
3.10"
Aug
2.9"
2.86"
Sep
2.3"
2.30"
Oct
1.9"
1.92"
Nov
1.6"
1.56"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec6h8.5h11.5h14.5h17h18.5h18h15.5h12.5h9.5h7h5.5h
Jan: 10:53 AM – 5:00 PM · 6h 07m
Feb: 9:42 AM – 6:22 PM · 8h 40m
Mar: 9:17 AM – 8:37 PM · 11h 20m
Apr: 7:39 AM – 9:57 PM · 14h 18m
May: 6:14 AM – 11:13 PM · 16h 60m
Jun: 5:26 AM – 12:09 PM · 18h 43m
Jul: 5:54 AM – 11:52 PM · 17h 59m
Aug: 7:07 AM – 10:36 PM · 15h 28m
Sep: 8:26 AM – 8:58 PM · 12h 32m
Oct: 9:43 AM – 7:22 PM · 9h 39m
Nov: 10:06 AM – 4:59 PM · 6h 53m
Dec: 11:05 AM – 4:21 PM · 5h 16m
Daylight Alaska Time (AKT) Longest: 18h 47m · Shortest: 5h 13m

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview