Frost Dates for Whitehorse Riverdale, YT

Elevation: 640 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. June 5
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. August 31

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 June 9
First Fall Frost August 21

Hard Freeze (−2°C)

Last Spring Hard Freeze May 21
First Fall Hard Freeze September 16
60.72°N, 135.03°W © OpenStreetMap

Growing Season

87 Days June 5 to August 31

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 2b

Avg. annual minimum: −43 to −40°C

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsc Subarctic (Dry Summer)

Cool, dry summers and cold winters. A rare climate found at high elevations. Very short growing season for cold-tolerant crops only.

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-12°-17°-21°
February-6°-12°-17°
March0°-7°-13°
April9°2°-5°
May16°8°1°
June21°13°6°
July22°15°9°
August20°13°7°
September13°8°2°
October5°1°-3°
November-5°-8°-12°
December-10°-15°-19°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January8
February3
March0
April0
May0
June28
July36
August33
September28
October10
November18
December5

Sunrise / Sunset

Daylight Longest: 18h 45m · Shortest: 5h 15m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January8:56 AM3:04 PM6h 08m
February7:40 AM4:20 PM8h 41m
March6:20 AM5:40 PM11h 20m
April4:51 AM7:09 PM14h 18m
May3:31 AM8:29 PM16h 59m
June2:39 AM9:21 PM18h 42m
July3:01 AM8:59 PM17h 57m
August4:16 AM7:44 PM15h 28m
September5:44 AM6:16 PM12h 32m
October7:10 AM4:50 PM9h 40m
November8:33 AM3:27 PM6h 54m
December9:21 AM2:39 PM5h 18m

Nearby Stations

Whitehorse A, YT June 3 - August 28 Mayo Road, YTJune 16 - August 11 Takhini River Ranch, YT June 17 - August 3 Blanchard River, YT June 23 - July 28 Skagway AP, AK April 21 - October 17 Skagway, AKMay 6 - October 1

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