Frost Dates for Bromont, Canada

Based on data from Granby weather station, 6 miles away

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 6
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 7
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 12
First Fall Frost October 2

Hard Freeze (−2°C)

Last Spring Hard Freeze April 22
First Fall Hard Freeze October 23
45.32°N, -72.65°W © OpenStreetMap

Growing Season

154 Days May 6 to October 7

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° 0° 15° 30°
-9°
High: -5°C
Avg: -9°C
Low: -14°C
Jan
-8°
High: -3°C
Avg: -8°C
Low: -12°C
Feb
-2°
High: 3°C
Avg: -2°C
Low: -6°C
Mar
6°
High: 11°C
Avg: 6°C
Low: 1°C
Apr
13°
High: 18°C
Avg: 13°C
Low: 8°C
May
18°
High: 23°C
Avg: 18°C
Low: 13°C
Jun
21°
High: 26°C
Avg: 21°C
Low: 16°C
Jul
20°
High: 24°C
Avg: 20°C
Low: 15°C
Aug
15°
High: 20°C
Avg: 15°C
Low: 10°C
Sep
9°
High: 13°C
Avg: 9°C
Low: 4°C
Oct
2°
High: 6°C
Avg: 2°C
Low: -2°C
Nov
-5°
High: -1°C
Avg: -5°C
Low: -9°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
99 mm
99.1 mm
Jan
81 mm
81.3 mm
Feb
86 mm
86.4 mm
Mar
99 mm
99.1 mm
Apr
104 mm
104.1 mm
May
112 mm
111.8 mm
Jun
119 mm
119.4 mm
Jul
112 mm
111.8 mm
Aug
117 mm
116.8 mm
Sep
112 mm
111.8 mm
Oct
91 mm
91.4 mm
Nov
91 mm
91.4 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9.5h8.5h
Jan: 7:33 AM – 4:27 PM · 8h 54m
Feb: 6:55 AM – 5:05 PM · 10h 09m
Mar: 6:11 AM – 5:49 PM · 11h 37m
Apr: 5:21 AM – 6:39 PM · 13h 17m
May: 4:39 AM – 7:21 PM · 14h 41m
Jun: 4:16 AM – 7:44 PM · 15h 27m
Jul: 4:26 AM – 7:34 PM · 15h 08m
Aug: 5:02 AM – 6:58 PM · 13h 55m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:39 AM – 5:21 PM · 10h 41m
Nov: 7:22 AM – 4:38 PM · 9h 15m
Dec: 7:44 AM – 4:16 PM · 8h 33m
Daylight Longest: 15h 29m · Shortest: 8h 31m

Nearby Stations

Farnham, QCMay 9 - October 3 Brome, QCMay 23 - September 16 St Hyacinthe 2, QC May 5 - October 4 Marieville, QCMay 4 - October 6 Bonsecours, QC May 20 - September 19 Sutton, QCMay 14 - October 1

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