Frost Dates for Calmar, AB

Elevation: 720 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 20
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 15

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 23
First Fall Frost September 10

Hard Freeze (−2°C)

Last Spring Hard Freeze May 8
First Fall Hard Freeze September 25
53.28°N, 113.87°W © OpenStreetMap

Growing Season

118 Days May 20 to September 15

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 3a

Avg. annual minimum: −40 to −37°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°-18°
February-2°-8°-15°
March2°-4°-10°
April12°5°-2°
May18°11°3°
June21°14°8°
July24°17°10°
August23°16°8°
September18°11°4°
October11°4°-2°
November1°-5°-10°
December-4°-9°-15°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January23
February8
March15
April20
May56
June84
July97
August58
September43
October28
November8
December0

Sunrise / Sunset

Daylight Longest: 16h 45m · Shortest: 7h 16m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:06 AM3:54 PM7h 48m
February7:14 AM4:46 PM9h 32m
March6:15 AM5:45 PM11h 30m
April5:09 AM6:51 PM13h 43m
May4:11 AM7:49 PM15h 37m
June3:39 AM8:21 PM16h 42m
July3:52 AM8:08 PM16h 15m
August4:43 AM7:17 PM14h 34m
September5:48 AM6:12 PM12h 24m
October6:52 AM5:08 PM10h 15m
November7:51 AM4:09 PM8h 18m
December8:21 AM3:39 PM7h 17m

Nearby Stations

Edmonton Woodbend, AB May 30 - September 12 Edmonton International Cs, AB May 26 - September 5 Edmonton Int'L A, AB May 25 - September 11 Edmonton Stony Plain, AB May 12 - September 22 Edmonton Stony Plain Cs, AB May 8 - September 23 University Of Alberta Metaboli, AB May 15 - September 20

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