Frost Dates for Toronto Lester B. Pearson Int', 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 26
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 19
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 13

Hard Freeze (−2°C)

Last Spring Hard Freeze April 9
First Fall Hard Freeze November 4
43.68°N, -79.63°W © OpenStreetMap

Growing Season

176 Days April 26 to October 19

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° 30°
-5°
High: -1°C
Avg: -5°C
Low: -9°C
Jan
-4°
High: 0°C
Avg: -4°C
Low: -8°C
Feb
1°
High: 5°C
Avg: 1°C
Low: -4°C
Mar
7°
High: 12°C
Avg: 7°C
Low: 2°C
Apr
13°
High: 19°C
Avg: 13°C
Low: 8°C
May
19°
High: 25°C
Avg: 19°C
Low: 14°C
Jun
22°
High: 27°C
Avg: 22°C
Low: 16°C
Jul
21°
High: 26°C
Avg: 21°C
Low: 16°C
Aug
17°
High: 22°C
Avg: 17°C
Low: 11°C
Sep
10°
High: 15°C
Avg: 10°C
Low: 5°C
Oct
4°
High: 8°C
Avg: 4°C
Low: 0°C
Nov
-2°
High: 2°C
Avg: -2°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 30 mm 60 mm 90 mm
71 mm
71.1 mm
Jan
53 mm
53.3 mm
Feb
51 mm
50.8 mm
Mar
71 mm
71.1 mm
Apr
81 mm
81.3 mm
May
79 mm
78.7 mm
Jun
74 mm
73.7 mm
Jul
66 mm
66.0 mm
Aug
66 mm
66.0 mm
Sep
58 mm
58.4 mm
Oct
76 mm
76.2 mm
Nov
61 mm
61.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10.5h11.5h13h14.5h15h15h14h12.5h11h9.5h9h
Jan: 7:27 AM – 4:33 PM · 9h 05m
Feb: 6:52 AM – 5:08 PM · 10h 16m
Mar: 6:11 AM – 5:49 PM · 11h 38m
Apr: 5:24 AM – 6:36 PM · 13h 13m
May: 4:44 AM – 7:16 PM · 14h 32m
Jun: 4:23 AM – 7:37 PM · 15h 14m
Jul: 4:32 AM – 7:28 PM · 14h 57m
Aug: 5:06 AM – 6:54 PM · 13h 48m
Sep: 5:52 AM – 6:08 PM · 12h 17m
Oct: 6:37 AM – 5:23 PM · 10h 46m
Nov: 7:17 AM – 4:43 PM · 9h 25m
Dec: 7:37 AM – 4:23 PM · 8h 45m
Daylight Longest: 15h 16m · Shortest: 8h 44m

Nearby Stations

Toronto North York, ON May 5 - October 12 Georgetown Wwtp, ON May 19 - October 1 Richmond Hill, ON May 1 - October 12 Toronto Buttonville A, ON May 4 - October 12 Orangeville Moe, ON May 19 - September 26 Burlington Piers (Aut), ON April 9 - November 15

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