Frost Dates for Tanana Calhoun Mem AP, AK
Elevation: 69 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 29
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.
August 28
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
June 2
First Fall Frost
August 22
Hard Freeze (28°F)
Last Spring Hard Freeze
May 16
First Fall Hard Freeze
September 8
Growing Season
91 Days
May 29 to August 28
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 1b
Avg. annual minimum: −55 to −50°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
-20°
10°
40°
70°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Hard Frost (28°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | -1° | -9° | -17° |
| February | 8° | -1° | -11° |
| March | 19° | 6° | -6° |
| April | 39° | 28° | 16° |
| May | 59° | 46° | 33° |
| June | 70° | 58° | 45° |
| July | 71° | 60° | 49° |
| August | 64° | 54° | 43° |
| September | 52° | 43° | 34° |
| October | 31° | 24° | 17° |
| November | 11° | 3° | -4° |
| December | 2° | -5° | -13° |
Precipitation
0"
1"
2"
3"
3.3"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 1.1 |
| February | 0.9 |
| March | 1.2 |
| April | 1.2 |
| May | 1.4 |
| June | 1.8 |
| July | 2.4 |
| August | 3.3 |
| September | 2.3 |
| October | 1.3 |
| November | 1.1 |
| December | 1.0 |
Sunrise / Sunset
Daylight
Longest: 21h 17m · Shortest: 2h 43m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 9:49 AM | 2:11 PM | 4h 22m |
| February | 8:03 AM | 3:57 PM | 7h 54m |
| March | 6:24 AM | 5:36 PM | 11h 11m |
| April | 4:36 AM | 7:24 PM | 14h 48m |
| May | 2:51 AM | 9:09 PM | 18h 19m |
| June | 1:25 AM | 10:35 PM | 21h 09m |
| July | 2:06 AM | 9:54 PM | 19h 48m |
| August | 3:52 AM | 8:08 PM | 16h 16m |
| September | 5:41 AM | 6:19 PM | 12h 38m |
| October | 7:26 AM | 4:34 PM | 9h 08m |
| November | 9:15 AM | 2:45 PM | 5h 31m |
| December | 10:35 AM | 1:25 PM | 2h 49m |
Nearby Stations
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