Frost Dates for BIRD ISLAND, South Georgia and the Islands
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.
December 13
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.
February 18
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
December 20
First Fall Frost
January 29
Hard Freeze (−2°C)
Last Spring Hard Freeze
November 4
First Fall Hard Freeze
April 29
Growing Season
67 Days
December 13 to February 18
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 8b
Avg. annual minimum: −9 to −7°C
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
ET
Tundra
No true summer — the warmest month averages below 10°C (50°F). Growing is limited to hardy greens, root crops, and cold-frames during the brief warm period. Permafrost restricts root depth.
Temperature
-5°
0°
5°
10°
Avg High
Avg Temp
Avg Low
Light Frost (0°C)
Hard Frost (−2°C)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 5° | 4° | 2° |
| February | 5° | 4° | 3° |
| March | 5° | 4° | 2° |
| April | 3° | 2° | 1° |
| May | 2° | 1° | -1° |
| June | 1° | 0° | -2° |
| July | 0° | -1° | -3° |
| August | 0° | -1° | -3° |
| September | 0° | -1° | -2° |
| October | 1° | 0° | -1° |
| November | 3° | 1° | 0° |
| December | 4° | 3° | 1° |
Precipitation
0 mm
50 mm
100 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 94 |
| February | 94 |
| March | 114 |
| April | 104 |
| May | 86 |
| June | 84 |
| July | 86 |
| August | 84 |
| September | 89 |
| October | 81 |
| November | 81 |
| December | 89 |
Sunrise / Sunset
Daylight
Longest: 16h 53m · Shortest: 7h 07m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 3:50 AM | 8:10 PM | 16h 19m |
| February | 4:44 AM | 7:16 PM | 14h 32m |
| March | 5:44 AM | 6:16 PM | 12h 31m |
| April | 6:53 AM | 5:07 PM | 10h 14m |
| May | 7:52 AM | 4:08 PM | 8h 17m |
| June | 8:26 AM | 3:34 PM | 7h 09m |
| July | 8:11 AM | 3:49 PM | 7h 37m |
| August | 7:19 AM | 4:41 PM | 9h 22m |
| September | 6:12 AM | 5:48 PM | 11h 36m |
| October | 5:06 AM | 6:54 PM | 13h 48m |
| November | 4:06 AM | 7:54 PM | 15h 48m |
| December | 3:34 AM | 8:26 PM | 16h 51m |
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