Frost Dates for Cardston, AB

Elevation: 1136 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 18
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. September 19

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 22
First Fall Frost September 15

Hard Freeze (−2°C)

Last Spring Hard Freeze May 6
First Fall Hard Freeze September 28
49.20°N, 113.28°W © OpenStreetMap

Growing Season

124 Days May 18 to September 19

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
January1°-5°-11°
February2°-4°-10°
March5°-1°-7°
April11°5°-1°
May16°10°4°
June20°14°8°
July26°18°10°
August26°17°9°
September20°12°5°
October12°6°-1°
November6°0°-6°
December1°-5°-10°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January8
February5
March10
April13
May53
June84
July20
August23
September25
October15
November3
December10

Sunrise / Sunset

Daylight Longest: 16h 01m · Shortest: 7h 59m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:47 AM4:13 PM8h 26m
February7:04 AM4:56 PM9h 53m
March6:13 AM5:47 PM11h 34m
April5:16 AM6:44 PM13h 29m
May4:27 AM7:33 PM15h 06m
June4:00 AM7:60 PM15h 60m
July4:11 AM7:49 PM15h 37m
August4:54 AM7:06 PM14h 12m
September5:50 AM6:10 PM12h 21m
October6:45 AM5:15 PM10h 30m
November7:35 AM4:25 PM8h 50m
December7:60 AM4:00 PM8h 00m

Nearby Stations

Carway, ABJune 8 - August 22 Waterton Park Gate, AB May 30 - September 2 Del Bonita, MT May 28 - September 16 St. Mary 1 Ssw, MT June 3 - September 8 St Mary, MTJune 12 - September 5 Brocket Agdm, AB May 14 - September 21

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