Frost Dates for Bethel AP, AK
Elevation: 31 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.
May 21
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.
September 22
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 28
First Fall Frost
September 16
Hard Freeze (28°F)
Last Spring Hard Freeze
May 11
First Fall Hard Freeze
October 1
Growing Season
124 Days
May 21 to September 22
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 4a
Avg. annual minimum: −30 to −25°F
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.
Temperature
0°
20°
40°
60°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Hard Frost (28°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 13° | 7° | 1° |
| February | 20° | 13° | 7° |
| March | 22° | 15° | 7° |
| April | 37° | 29° | 21° |
| May | 52° | 43° | 34° |
| June | 62° | 53° | 45° |
| July | 64° | 56° | 49° |
| August | 61° | 54° | 47° |
| September | 53° | 46° | 39° |
| October | 38° | 32° | 26° |
| November | 24° | 19° | 13° |
| December | 16° | 10° | 4° |
Precipitation
0"
1"
2"
3"
3.1"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 1.3 |
| February | 1.4 |
| March | 1.2 |
| April | 1.2 |
| May | 1.6 |
| June | 2.1 |
| July | 2.7 |
| August | 3.1 |
| September | 2.9 |
| October | 2.3 |
| November | 1.9 |
| December | 1.6 |
Sunrise / Sunset
Daylight
Alaska Time (AKT)
Longest: 18h 47m · Shortest: 5h 13m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 10:53 AM | 5:00 PM | 6h 07m |
| February | 9:42 AM | 6:22 PM | 8h 40m |
| March | 9:17 AM | 8:37 PM | 11h 20m |
| April | 7:39 AM | 9:57 PM | 14h 18m |
| May | 6:14 AM | 11:13 PM | 16h 60m |
| June | 5:26 AM | 12:09 PM | 18h 43m |
| July | 5:54 AM | 11:52 PM | 17h 59m |
| August | 7:07 AM | 10:36 PM | 15h 28m |
| September | 8:26 AM | 8:58 PM | 12h 32m |
| October | 9:43 AM | 7:22 PM | 9h 39m |
| November | 10:06 AM | 4:59 PM | 6h 53m |
| December | 11:05 AM | 4:21 PM | 5h 16m |
Plan Your Garden with Planter
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