Frost Dates for Saint-Boniface, QC

Based on data from Maniwaki Airport weather station, 16 miles away

Elevation: 241 m

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 16
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. September 25
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 21
First Fall Frost September 20

Hard Freeze (−2°C)

Last Spring Hard Freeze May 6
First Fall Hard Freeze October 7
46.50°N, -75.98°W © OpenStreetMap

Growing Season

132 Days May 16 to September 25

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 4a

Avg. annual minimum: −30 to −25°F (−34 to −32°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°
-12°
High: -7°C
Avg: -12°C
Low: -17°C
Jan
-10°
High: -4°C
Avg: -10°C
Low: -16°C
Feb
-4°
High: 2°C
Avg: -4°C
Low: -10°C
Mar
4°
High: 10°C
Avg: 4°C
Low: -2°C
Apr
12°
High: 19°C
Avg: 12°C
Low: 5°C
May
17°
High: 23°C
Avg: 17°C
Low: 10°C
Jun
19°
High: 26°C
Avg: 19°C
Low: 13°C
Jul
18°
High: 24°C
Avg: 18°C
Low: 11°C
Aug
14°
High: 20°C
Avg: 14°C
Low: 7°C
Sep
7°
High: 12°C
Avg: 7°C
Low: 2°C
Oct
0°
High: 4°C
Avg: 0°C
Low: -4°C
Nov
-8°
High: -3°C
Avg: -8°C
Low: -12°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
79 mm
78.7 mm
Jan
69 mm
68.6 mm
Feb
66 mm
66.0 mm
Mar
74 mm
73.7 mm
Apr
79 mm
78.7 mm
May
91 mm
91.4 mm
Jun
94 mm
94.0 mm
Jul
86 mm
86.4 mm
Aug
74 mm
73.7 mm
Sep
97 mm
96.5 mm
Oct
81 mm
81.3 mm
Nov
86 mm
86.4 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:49 AM – 4:37 PM · 8h 48m
Feb: 7:16 AM – 5:21 PM · 10h 06m
Mar: 7:25 AM – 7:02 PM · 11h 36m
Apr: 6:24 AM – 7:44 PM · 13h 20m
May: 5:37 AM – 8:24 PM · 14h 47m
Jun: 5:17 AM – 8:51 PM · 15h 34m
Jul: 5:32 AM – 8:47 PM · 15h 15m
Aug: 6:09 AM – 8:08 PM · 13h 59m
Sep: 6:49 AM – 7:08 PM · 12h 19m
Oct: 7:30 AM – 6:08 PM · 10h 39m
Nov: 7:14 AM – 4:24 PM · 9h 10m
Dec: 7:47 AM – 4:13 PM · 8h 26m
Daylight Eastern Time (ET) Longest: 15h 36m · Shortest: 8h 24m

Nearby Stations

Wright, QCMay 23 - September 22 Mont Laurier, QC May 21 - September 25 High Falls, QCMay 9 - October 11 Nominingue, QC May 25 - September 19 Charteris, QC May 22 - September 19 Shawville, QC May 18 - September 27

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