Frost Dates for Killarney (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. April 28
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. October 23
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 May 2
First Fall Frost October 18

Hard Freeze (−2°C)

Last Spring Hard Freeze April 16
First Fall Hard Freeze November 6
45.97°N, -81.48°W © OpenStreetMap

Growing Season

178 Days April 28 to October 23

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.

Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

-15° -5° 5° 15° 25°
-9°
High: -4°C
Avg: -9°C
Low: -13°C
Jan
-8°
High: -4°C
Avg: -8°C
Low: -12°C
Feb
-3°
High: 1°C
Avg: -3°C
Low: -7°C
Mar
4°
High: 7°C
Avg: 4°C
Low: 0°C
Apr
10°
High: 14°C
Avg: 10°C
Low: 7°C
May
16°
High: 19°C
Avg: 16°C
Low: 13°C
Jun
19°
High: 22°C
Avg: 19°C
Low: 16°C
Jul
19°
High: 22°C
Avg: 19°C
Low: 16°C
Aug
15°
High: 18°C
Avg: 15°C
Low: 12°C
Sep
8°
High: 11°C
Avg: 8°C
Low: 5°C
Oct
2°
High: 5°C
Avg: 2°C
Low: -1°C
Nov
-4°
High: -1°C
Avg: -4°C
Low: -8°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
0 mm
0.0 mm
Jan
0 mm
0.0 mm
Feb
0 mm
0.0 mm
Mar
0 mm
0.0 mm
Apr
25 mm
25.4 mm
May
36 mm
35.6 mm
Jun
33 mm
33.0 mm
Jul
71 mm
71.1 mm
Aug
28 mm
27.9 mm
Sep
43 mm
43.2 mm
Oct
28 mm
27.9 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:35 AM – 4:25 PM · 8h 50m
Feb: 6:57 AM – 5:03 PM · 10h 07m
Mar: 6:12 AM – 5:48 PM · 11h 37m
Apr: 5:20 AM – 6:40 PM · 13h 19m
May: 4:38 AM – 7:22 PM · 14h 45m
Jun: 4:14 AM – 7:46 PM · 15h 32m
Jul: 4:24 AM – 7:36 PM · 15h 13m
Aug: 5:01 AM – 6:59 PM · 13h 58m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:40 AM – 5:20 PM · 10h 39m
Nov: 7:24 AM – 4:36 PM · 9h 12m
Dec: 7:46 AM – 4:14 PM · 8h 28m
Daylight Longest: 15h 33m · Shortest: 8h 27m

Nearby Stations

Massey, ONMay 26 - September 21 Sandfield, ONMay 17 - October 6 Cove Island (Aut), ON April 22 - November 4 Sudbury A, ONMay 16 - October 1 Monetville, ON May 21 - September 23 Great Duck Island (Aut), ON April 25 - October 27

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