Frost Dates for Big Delta AP, AK
Elevation: 389 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 17
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 7
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 24
First Fall Frost
September 1
Hard Freeze (28°F)
Last Spring Hard Freeze
May 6
First Fall Hard Freeze
September 20
Growing Season
113 Days
May 17 to September 7
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 2b
Avg. annual minimum: −45 to −40°F
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dwc
Subarctic (Dry Winter)
Short summers and long, extremely cold, dry winters. Among the most challenging climates for gardening. Only the hardiest, fastest-maturing crops succeed.
Temperature
-10°
10°
30°
50°
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 | 6° | -1° | -8° |
| February | 16° | 7° | -1° |
| March | 25° | 14° | 4° |
| April | 44° | 34° | 24° |
| May | 59° | 48° | 38° |
| June | 68° | 59° | 49° |
| July | 70° | 61° | 52° |
| August | 65° | 56° | 47° |
| September | 53° | 45° | 36° |
| October | 33° | 27° | 20° |
| November | 15° | 8° | 1° |
| December | 9° | 2° | -5° |
Precipitation
0"
1"
2"
2.7"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 0.7 |
| February | 0.8 |
| March | 0.8 |
| April | 0.8 |
| May | 1.5 |
| June | 2.5 |
| July | 2.7 |
| August | 2.3 |
| September | 1.6 |
| October | 1.2 |
| November | 0.9 |
| December | 0.8 |
Sunrise / Sunset
Daylight
Longest: 20h 22m · Shortest: 3h 38m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 9:32 AM | 2:28 PM | 4h 57m |
| February | 7:56 AM | 4:04 PM | 8h 08m |
| March | 6:23 AM | 5:37 PM | 11h 14m |
| April | 4:41 AM | 7:19 PM | 14h 39m |
| May | 3:03 AM | 8:57 PM | 17h 54m |
| June | 1:52 AM | 10:08 PM | 20h 16m |
| July | 2:24 AM | 9:36 PM | 19h 11m |
| August | 3:59 AM | 8:01 PM | 16h 02m |
| September | 5:42 AM | 6:18 PM | 12h 36m |
| October | 7:21 AM | 4:39 PM | 9h 18m |
| November | 9:02 AM | 2:58 PM | 5h 57m |
| December | 10:09 AM | 1:51 PM | 3h 43m |
Nearby Stations
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