Frost Dates for L'Assomption, QC

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 5
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 6
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 10
First Fall Frost September 30

Hard Freeze (−2°C)

Last Spring Hard Freeze April 23
First Fall Hard Freeze October 21
45.82°N, -73.43°W © OpenStreetMap

Growing Season

154 Days May 5 to October 6

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 4b

Avg. annual minimum: −25 to −20°F (−32 to −29°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

-20° -5° 10° 25°
-11°
High: -6°C
Avg: -11°C
Low: -16°C
Jan
-10°
High: -4°C
Avg: -10°C
Low: -15°C
Feb
-3°
High: 2°C
Avg: -3°C
Low: -8°C
Mar
5°
High: 11°C
Avg: 5°C
Low: 0°C
Apr
13°
High: 19°C
Avg: 13°C
Low: 7°C
May
18°
High: 24°C
Avg: 18°C
Low: 12°C
Jun
21°
High: 27°C
Avg: 21°C
Low: 15°C
Jul
20°
High: 26°C
Avg: 20°C
Low: 14°C
Aug
15°
High: 21°C
Avg: 15°C
Low: 9°C
Sep
8°
High: 13°C
Avg: 8°C
Low: 3°C
Oct
1°
High: 5°C
Avg: 1°C
Low: -3°C
Nov
-6°
High: -2°C
Avg: -6°C
Low: -10°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
81 mm
81.3 mm
Jan
71 mm
71.1 mm
Feb
74 mm
73.7 mm
Mar
102 mm
101.6 mm
Apr
97 mm
96.5 mm
May
102 mm
101.6 mm
Jun
99 mm
99.1 mm
Jul
99 mm
99.1 mm
Aug
86 mm
86.4 mm
Sep
99 mm
99.1 mm
Oct
91 mm
91.4 mm
Nov
99 mm
99.1 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:34 AM – 4:26 PM · 8h 51m
Feb: 6:56 AM – 5:04 PM · 10h 07m
Mar: 6:12 AM – 5:48 PM · 11h 37m
Apr: 5:21 AM – 6:39 PM · 13h 19m
May: 4:38 AM – 7:22 PM · 14h 44m
Jun: 4:15 AM – 7:45 PM · 15h 31m
Jul: 4:24 AM – 7:36 PM · 15h 11m
Aug: 5:02 AM – 6:58 PM · 13h 57m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:40 AM – 5:20 PM · 10h 40m
Nov: 7:24 AM – 4:36 PM · 9h 13m
Dec: 7:45 AM – 4:15 PM · 8h 29m
Daylight Longest: 15h 32m · Shortest: 8h 28m

Nearby Stations

Vercheres, QCMay 1 - October 9 Varennes, QCApril 30 - October 8 Riviere Des Prairies, QC May 2 - October 9 St Jacques, QCMay 12 - October 3 St Amable, QCMay 7 - October 2 Joliette Ville, QC May 8 - October 3

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview