Frost Dates for Olds, AB

Elevation: 1040 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 18

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 11

Hard Freeze (−2°C)

Last Spring Hard Freeze May 6
First Fall Hard Freeze September 28
51.78°N, 114.10°W © OpenStreetMap

Growing Season

123 Days May 18 to September 18

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-4°-10°-15°
February-1°-6°-12°
March2°-4°-9°
April10°4°-2°
May16°9°3°
June19°13°7°
July22°16°10°
August22°16°9°
September18°11°5°
October10°4°-2°
November2°-3°-8°
December-2°-7°-13°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January5
February5
March15
April18
May61
June97
July84
August53
September33
October8
November8
December5

Sunrise / Sunset

Daylight Mountain Time (MT) Longest: 16h 27m · Shortest: 7h 33m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month Sunrise Sunset Daylight
January8:44 AM4:47 PM8h 03m
February8:01 AM5:41 PM9h 40m
March8:00 AM7:32 PM11h 31m
April6:48 AM8:25 PM13h 37m
May5:50 AM9:15 PM15h 25m
June5:24 AM9:49 PM16h 25m
July5:42 AM9:42 PM16h 00m
August6:28 AM8:53 PM14h 25m
September7:20 AM7:42 PM12h 23m
October8:11 AM6:32 PM10h 21m
November8:06 AM4:37 PM8h 31m
December8:45 AM4:19 PM7h 34m

Nearby Stations

Madden, ABMay 26 - September 7 Sundre A, ABJune 9 - August 25 Red Deer A, AB May 23 - September 12 Eckville South, AB May 22 - September 12 Three Hills, AB May 22 - September 15 Red Deer, ABMay 18 - September 19

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