Frost Dates for MITT. SISIMIUT, Greenland

Elevation: 1 m

Frost Dates

Last Spring Frost (50%) iA 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%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. September 9
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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
66.95°N, -53.72°W © OpenStreetMap

Growing Season

96 Days June 5 to September 9

USDA Hardiness Zone iHardiness 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

Learn more

Köppen Climate iThe 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.

Köppen climate map

Temperature

-20° -10° 0° 10°
-16°
High: -13°C
Avg: -16°C
Low: -18°C
Jan
-17°
High: -15°C
Avg: -17°C
Low: -20°C
Feb
-15°
High: -12°C
Avg: -15°C
Low: -17°C
Mar
-8°
High: -5°C
Avg: -8°C
Low: -10°C
Apr
-1°
High: 1°C
Avg: -1°C
Low: -3°C
May
5°
High: 7°C
Avg: 5°C
Low: 3°C
Jun
8°
High: 10°C
Avg: 8°C
Low: 6°C
Jul
7°
High: 9°C
Avg: 7°C
Low: 5°C
Aug
3°
High: 5°C
Avg: 3°C
Low: 1°C
Sep
-4°
High: -1°C
Avg: -4°C
Low: -6°C
Oct
-9°
High: -7°C
Avg: -9°C
Low: -12°C
Nov
-12°
High: -10°C
Avg: -12°C
Low: -15°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 20 mm 40 mm 60 mm 80 mm
33 mm
33.0 mm
Jan
10 mm
10.2 mm
Feb
18 mm
17.8 mm
Mar
25 mm
25.4 mm
Apr
33 mm
33.0 mm
May
38 mm
38.1 mm
Jun
58 mm
58.4 mm
Jul
74 mm
73.7 mm
Aug
69 mm
68.6 mm
Sep
61 mm
61.0 mm
Oct
56 mm
55.9 mm
Nov
48 mm
48.3 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec3h7.5h11h15h19h24h21h16.5h12.5h9h4.5h0h
Jan: 10:25 AM – 1:35 PM · 3h 11m
Feb: 8:15 AM – 3:45 PM · 7h 30m
Mar: 6:27 AM – 5:33 PM · 11h 07m
Apr: 4:28 AM – 7:32 PM · 15h 03m
May: 2:28 AM – 9:32 PM · 19h 05m
Jun: 24h (Midnight Sun)
Jul: 1:28 AM – 10:32 PM · 21h 03m
Aug: 3:39 AM – 8:21 PM · 16h 42m
Sep: 5:39 AM – 6:21 PM · 12h 42m
Oct: 7:34 AM – 4:26 PM · 8h 53m
Nov: 9:39 AM – 2:21 PM · 4h 43m
Dec: 0h (Polar Night)
Daylight Longest: 24h 00m · Shortest: 0h 00m

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