Frost Dates for MITT. SISIMIUT, Greenland
Elevation: 1 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.
June 5
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 9
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 10
First Fall Frost
September 2
Hard Freeze (−2°C)
Last Spring Hard Freeze
May 26
First Fall Hard Freeze
September 24
Growing Season
96 Days
June 5 to September 9
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 4b
Avg. annual minimum: −32 to −29°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
-20°
-10°
0°
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 | -13° | -16° | -18° |
| February | -15° | -17° | -20° |
| March | -12° | -15° | -17° |
| April | -5° | -8° | -10° |
| May | 1° | -1° | -3° |
| June | 7° | 5° | 3° |
| July | 10° | 8° | 6° |
| August | 9° | 7° | 5° |
| September | 5° | 3° | 1° |
| October | -1° | -4° | -6° |
| November | -7° | -9° | -12° |
| December | -10° | -12° | -15° |
Precipitation
0 mm
20 mm
40 mm
60 mm
80 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 33 |
| February | 10 |
| March | 18 |
| April | 25 |
| May | 33 |
| June | 38 |
| July | 58 |
| August | 74 |
| September | 69 |
| October | 61 |
| November | 56 |
| December | 48 |
Sunrise / Sunset
Daylight
Longest: 24h 00m · Shortest: 0h 00m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 10:25 AM | 1:35 PM | 3h 11m |
| February | 8:15 AM | 3:45 PM | 7h 30m |
| March | 6:27 AM | 5:33 PM | 11h 07m |
| April | 4:28 AM | 7:32 PM | 15h 03m |
| May | 2:28 AM | 9:32 PM | 19h 05m |
| June | – | – | 24h (midnight sun) |
| July | 1:28 AM | 10:32 PM | 21h 03m |
| August | 3:39 AM | 8:21 PM | 16h 42m |
| September | 5:39 AM | 6:21 PM | 12h 42m |
| October | 7:34 AM | 4:26 PM | 8h 53m |
| November | 9:39 AM | 2:21 PM | 4h 43m |
| December | – | – | 0h (polar night) |
Plan Your Garden with Planter
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