Frost Dates for Rowley Island, NU

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 23
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. August 17
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 27
First Fall Frost August 7

Hard Freeze (−2°C)

Last Spring Hard Freeze June 12
First Fall Hard Freeze September 13
69.08°N, -79.03°W © OpenStreetMap

Growing Season

55 Days June 23 to August 17

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 3a

Avg. annual minimum: −40 to −35°F (−40 to −37°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

-35° -20° -5° 10°
-28°
High: -25°C
Avg: -28°C
Low: -31°C
Jan
-28°
High: -25°C
Avg: -28°C
Low: -31°C
Feb
-24°
High: -21°C
Avg: -24°C
Low: -28°C
Mar
-17°
High: -13°C
Avg: -17°C
Low: -21°C
Apr
-7°
High: -4°C
Avg: -7°C
Low: -10°C
May
1°
High: 3°C
Avg: 1°C
Low: -1°C
Jun
7°
High: 11°C
Avg: 7°C
Low: 4°C
Jul
5°
High: 8°C
Avg: 5°C
Low: 2°C
Aug
0°
High: 2°C
Avg: 0°C
Low: -1°C
Sep
-6°
High: -4°C
Avg: -6°C
Low: -8°C
Oct
-15°
High: -12°C
Avg: -15°C
Low: -18°C
Nov
-22°
High: -19°C
Avg: -22°C
Low: -26°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm
0 mm
0.0 mm
Jan
0 mm
0.0 mm
Feb
0 mm
0.0 mm
Mar
0 mm
0.0 mm
Apr
0 mm
0.0 mm
May
0 mm
0.0 mm
Jun
0 mm
0.0 mm
Jul
0 mm
0.0 mm
Aug
0 mm
0.0 mm
Sep
0 mm
0.0 mm
Oct
0 mm
0.0 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec0h7h11h15.5h20.5h24h24h17.5h13h8.5h3.5h0h
Jan: 0h (Polar Night)
Feb: 8:33 AM – 3:27 PM · 6h 55m
Mar: 6:30 AM – 5:30 PM · 11h 01m
Apr: 4:17 AM – 7:43 PM · 15h 26m
May: 1:48 AM – 10:12 PM · 20h 23m
Jun: 24h (Midnight Sun)
Jul: 24h (Midnight Sun)
Aug: 3:20 AM – 8:40 PM · 17h 19m
Sep: 5:37 AM – 6:23 PM · 12h 47m
Oct: 7:45 AM – 4:15 PM · 8h 30m
Nov: 10:21 AM – 1:39 PM · 3h 18m
Dec: 0h (Polar Night)
Daylight Longest: 24h 00m · Shortest: 0h 00m

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