Frost Dates for Alliston, PE

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 10
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 30
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 16
First Fall Frost October 26

Hard Freeze (−2°C)

Last Spring Hard Freeze April 20
First Fall Hard Freeze November 15
46.07°N, -62.60°W © OpenStreetMap

Growing Season

173 Days May 10 to October 30

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 6a

Avg. annual minimum: −10 to −5°F (−23 to −21°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

-10° 0° 10° 20°
-6°
High: -2°C
Avg: -6°C
Low: -10°C
Jan
-6°
High: -2°C
Avg: -6°C
Low: -10°C
Feb
-2°
High: 2°C
Avg: -2°C
Low: -6°C
Mar
4°
High: 8°C
Avg: 4°C
Low: 0°C
Apr
10°
High: 15°C
Avg: 10°C
Low: 5°C
May
15°
High: 20°C
Avg: 15°C
Low: 10°C
Jun
20°
High: 24°C
Avg: 20°C
Low: 15°C
Jul
20°
High: 24°C
Avg: 20°C
Low: 15°C
Aug
16°
High: 20°C
Avg: 16°C
Low: 12°C
Sep
10°
High: 13°C
Avg: 10°C
Low: 6°C
Oct
4°
High: 7°C
Avg: 4°C
Low: 1°C
Nov
-1°
High: 2°C
Avg: -1°C
Low: -5°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 150 mm
94 mm
94.0 mm
Jan
97 mm
96.5 mm
Feb
84 mm
83.8 mm
Mar
89 mm
88.9 mm
Apr
97 mm
96.5 mm
May
102 mm
101.6 mm
Jun
99 mm
99.1 mm
Jul
104 mm
104.1 mm
Aug
132 mm
132.1 mm
Sep
132 mm
132.1 mm
Oct
122 mm
121.9 mm
Nov
132 mm
132.1 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:35 AM – 4:25 PM · 8h 49m
Feb: 6:57 AM – 5:03 PM · 10h 06m
Mar: 6:12 AM – 5:48 PM · 11h 37m
Apr: 5:20 AM – 6:40 PM · 13h 19m
May: 4:37 AM – 7:23 PM · 14h 45m
Jun: 4:14 AM – 7:46 PM · 15h 33m
Jul: 4:23 AM – 7:37 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 11m
Dec: 7:46 AM – 4:14 PM · 8h 27m
Daylight Longest: 15h 34m · Shortest: 8h 26m

Nearby Stations

Caribou Point (Aut), NS April 27 - November 4 Lyons Brook, NSMay 24 - October 3 Charlottetown A, PE May 18 - October 18 Harrington Cda Cs, PE May 13 - October 24 Stanhope, PEMay 18 - October 22 Elmwood, PEMay 21 - October 9

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