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

Based on data from St Jacques weather station, 6 miles away

Elevation: 47 m

Frost Dates

Last Spring Frost (50%) A 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%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 3

30% Probability

Only 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

Hardiness 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: −34 to −32°C

Learn more

Köppen Climate

The 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

Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January-6°-12°-17°
February-4°-10°-16°
March2°-3°-9°
April11°5°0°
May19°13°7°
June24°18°12°
July27°21°15°
August26°19°13°
September21°15°9°
October13°8°3°
November5°1°-3°
December-3°-7°-11°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January81
February41
March51
April79
May97
June112
July102
August94
September102
October94
November81
December71

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 15h 33m · Shortest: 8h 27m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:39 AM4:29 PM8h 50m
February7:05 AM5:12 PM10h 07m
March7:16 AM6:52 PM11h 37m
April6:15 AM7:34 PM13h 19m
May5:28 AM8:13 PM14h 45m
June5:09 AM8:40 PM15h 32m
July5:24 AM8:36 PM15h 12m
August5:60 AM7:57 PM13h 58m
September6:40 AM6:58 PM12h 18m
October7:20 AM5:59 PM10h 39m
November7:04 AM4:15 PM9h 12m
December7:36 AM4:04 PM8h 28m

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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