Frost Dates for Saint-Roch-de-l'Achigan, Canada

Based on data from St Jacques 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 12
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 3
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 17
First Fall Frost September 26

Hard Freeze (−2°C)

Last Spring Hard Freeze April 20
First Fall Hard Freeze October 15
45.86°N, -73.59°W © OpenStreetMap

Growing Season

144 Days May 12 to October 3

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: -6°C
Avg: -12°C
Low: -17°C
Jan
-10°
High: -4°C
Avg: -10°C
Low: -16°C
Feb
-3°
High: 2°C
Avg: -3°C
Low: -9°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
19°
High: 26°C
Avg: 19°C
Low: 13°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
-7°
High: -3°C
Avg: -7°C
Low: -11°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
41 mm
40.6 mm
Feb
51 mm
50.8 mm
Mar
79 mm
78.7 mm
Apr
97 mm
96.5 mm
May
112 mm
111.8 mm
Jun
102 mm
101.6 mm
Jul
94 mm
94.0 mm
Aug
102 mm
101.6 mm
Sep
94 mm
94.0 mm
Oct
81 mm
81.3 mm
Nov
71 mm
71.1 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:35 AM – 4:25 PM · 8h 50m
Feb: 6:57 AM – 5:03 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 45m
Jun: 4:14 AM – 7:46 PM · 15h 32m
Jul: 4:24 AM – 7:36 PM · 15h 12m
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 12m
Dec: 7:46 AM – 4:14 PM · 8h 28m
Daylight Longest: 15h 33m · Shortest: 8h 27m

Nearby Stations

Joliette Ville, QC May 8 - October 3 L'Assomption, QCMay 5 - October 6 Vercheres, QCMay 1 - October 9 Ste Beatrix, QC May 23 - September 17 Riviere Des Prairies, QC May 2 - October 9 Varennes, QCApril 30 - October 8

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