Frost Dates for Shannon, QC

Based on data from Quebec/Jean Lesage Intl weather station, 8 miles away

Elevation: 170 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 9
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 5

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 14
First Fall Frost October 1

Hard Freeze (−2°C)

Last Spring Hard Freeze April 26
First Fall Hard Freeze October 17
46.88°N, 71.51°W © OpenStreetMap

Growing Season

149 Days May 9 to October 5

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 4b

Avg. annual minimum: −32 to −29°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-7°-12°-16°
February-5°-10°-15°
March0°-4°-9°
April8°4°-1°
May17°12°6°
June22°17°11°
July25°19°14°
August24°19°13°
September19°14°8°
October11°7°2°
November4°0°-4°
December-3°-7°-11°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January84
February69
March76
April89
May91
June119
July122
August109
September112
October119
November89
December97

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 15h 40m · Shortest: 8h 20m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:33 AM4:17 PM8h 44m
February6:58 AM5:02 PM10h 03m
March7:07 AM6:43 PM11h 36m
April6:05 AM7:26 PM13h 21m
May5:17 AM8:07 PM14h 50m
June4:56 AM8:35 PM15h 39m
July5:12 AM8:30 PM15h 19m
August5:49 AM7:50 PM14h 01m
September6:31 AM6:49 PM12h 19m
October7:12 AM5:49 PM10h 37m
November6:57 AM4:04 PM9h 06m
December7:31 AM3:52 PM8h 21m

Nearby Stations

Ste-Foy (U. Laval), QC May 4 - October 8 Lauzon, QCMay 16 - September 27 Beausejour, QC May 19 - September 27 Chateau Richer, QC May 15 - October 10 St Flavien, QC May 22 - September 20 Saint Michel, QC May 11 - October 2

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