Frost Dates for Mary'S Harbour, NL

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 4
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 27
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 9
First Fall Frost September 22

Hard Freeze (−2°C)

Last Spring Hard Freeze May 17
First Fall Hard Freeze October 13
52.30°N, -55.83°W © OpenStreetMap

Growing Season

115 Days June 4 to September 27

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 5a

Avg. annual minimum: −20 to −15°F (−29 to −26°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfc Subarctic

Short, cool summers and long, very cold winters. Growing seasons of 3–4 months require fast-maturing varieties. Root vegetables, potatoes, and cold-hardy greens are the most reliable.

Köppen climate map

Temperature

-20° -10° 0° 10° 20°
-11°
High: -6°C
Avg: -11°C
Low: -16°C
Jan
-11°
High: -5°C
Avg: -11°C
Low: -16°C
Feb
-7°
High: -2°C
Avg: -7°C
Low: -11°C
Mar
-1°
High: 3°C
Avg: -1°C
Low: -4°C
Apr
4°
High: 9°C
Avg: 4°C
Low: 0°C
May
10°
High: 15°C
Avg: 10°C
Low: 4°C
Jun
14°
High: 19°C
Avg: 14°C
Low: 9°C
Jul
14°
High: 19°C
Avg: 14°C
Low: 9°C
Aug
11°
High: 15°C
Avg: 11°C
Low: 6°C
Sep
4°
High: 8°C
Avg: 4°C
Low: 1°C
Oct
-1°
High: 3°C
Avg: -1°C
Low: -5°C
Nov
-7°
High: -3°C
Avg: -7°C
Low: -11°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 30 mm 60 mm 90 mm
36 mm
35.6 mm
Jan
43 mm
43.2 mm
Feb
33 mm
33.0 mm
Mar
43 mm
43.2 mm
Apr
61 mm
61.0 mm
May
61 mm
61.0 mm
Jun
79 mm
78.7 mm
Jul
58 mm
58.4 mm
Aug
74 mm
73.7 mm
Sep
99 mm
99.1 mm
Oct
84 mm
83.8 mm
Nov
58 mm
58.4 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h9.5h11.5h13.5h15.5h16.5h16h14.5h12.5h10.5h8.5h7.5h
Jan: 8:01 AM – 3:59 PM · 7h 58m
Feb: 7:11 AM – 4:49 PM · 9h 38m
Mar: 6:15 AM – 5:45 PM · 11h 31m
Apr: 5:10 AM – 6:50 PM · 13h 39m
May: 4:16 AM – 7:44 PM · 15h 29m
Jun: 3:44 AM – 8:16 PM · 16h 31m
Jul: 3:57 AM – 8:03 PM · 16h 05m
Aug: 4:46 AM – 7:14 PM · 14h 28m
Sep: 5:49 AM – 6:11 PM · 12h 23m
Oct: 6:51 AM – 5:09 PM · 10h 19m
Nov: 7:47 AM – 4:13 PM · 8h 26m
Dec: 8:16 AM – 3:44 PM · 7h 29m
Daylight Longest: 16h 33m · Shortest: 7h 27m

Nearby Stations

St Anthony, NL June 6 - September 29 Main Brook, NL June 6 - September 20 Plum Point, NLMay 28 - October 6

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