Frost Dates for Lansdowne House (Aut), ON

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. May 31
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 13
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 6
First Fall Frost September 8

Hard Freeze (−2°C)

Last Spring Hard Freeze May 21
First Fall Hard Freeze September 28
52.20°N, -87.93°W © OpenStreetMap

Growing Season

105 Days May 31 to September 13

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 2b

Avg. annual minimum: −45 to −40°F (−43 to −40°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

-30° -15° 0° 15°
-20°
High: -15°C
Avg: -20°C
Low: -26°C
Jan
-19°
High: -12°C
Avg: -19°C
Low: -26°C
Feb
-11°
High: -3°C
Avg: -11°C
Low: -19°C
Mar
-2°
High: 5°C
Avg: -2°C
Low: -9°C
Apr
7°
High: 14°C
Avg: 7°C
Low: 0°C
May
14°
High: 20°C
Avg: 14°C
Low: 8°C
Jun
17°
High: 23°C
Avg: 17°C
Low: 11°C
Jul
15°
High: 21°C
Avg: 15°C
Low: 10°C
Aug
10°
High: 16°C
Avg: 10°C
Low: 5°C
Sep
3°
High: 6°C
Avg: 3°C
Low: -1°C
Oct
-7°
High: -3°C
Avg: -7°C
Low: -11°C
Nov
-16°
High: -11°C
Avg: -16°C
Low: -21°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 50 mm 100 mm
3 mm
2.5 mm
Jan
3 mm
2.5 mm
Feb
13 mm
12.7 mm
Mar
20 mm
20.3 mm
Apr
64 mm
63.5 mm
May
81 mm
81.3 mm
Jun
89 mm
88.9 mm
Jul
84 mm
83.8 mm
Aug
102 mm
101.6 mm
Sep
74 mm
73.7 mm
Oct
58 mm
58.4 mm
Nov
8 mm
7.6 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8h9.5h11.5h13.5h15.5h16.5h16h14.5h12.5h10.5h8.5h7.5h
Jan: 8:00 AM – 3:60 PM · 7h 59m
Feb: 7:11 AM – 4:49 PM · 9h 38m
Mar: 6:15 AM – 5:45 PM · 11h 31m
Apr: 5:11 AM – 6:49 PM · 13h 39m
May: 4:16 AM – 7:44 PM · 15h 28m
Jun: 3:45 AM – 8:15 PM · 16h 30m
Jul: 3:58 AM – 8:02 PM · 16h 04m
Aug: 4:46 AM – 7:14 PM · 14h 27m
Sep: 5:49 AM – 6:11 PM · 12h 23m
Oct: 6:50 AM – 5:10 PM · 10h 19m
Nov: 7:46 AM – 4:14 PM · 8h 27m
Dec: 8:15 AM – 3:45 PM · 7h 30m
Daylight Longest: 16h 32m · Shortest: 7h 28m

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