Frost Dates for Macmillan Pass, YT

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. June 18
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. August 6
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 23
First Fall Frost July 27

Hard Freeze (−2°C)

Last Spring Hard Freeze June 1
First Fall Hard Freeze August 22
63.25°N, -130.03°W © OpenStreetMap

Growing Season

49 Days June 18 to August 6

USDA Hardiness Zone iHardiness 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 −35°F (−40 to −37°C)

Learn more

Köppen Climate iThe 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

-25° -10° 5° 20°
-18°
High: -14°C
Avg: -18°C
Low: -22°C
Jan
-17°
High: -13°C
Avg: -17°C
Low: -21°C
Feb
-17°
High: -12°C
Avg: -17°C
Low: -21°C
Mar
-8°
High: -3°C
Avg: -8°C
Low: -13°C
Apr
2°
High: 7°C
Avg: 2°C
Low: -3°C
May
9°
High: 15°C
Avg: 9°C
Low: 3°C
Jun
11°
High: 16°C
Avg: 11°C
Low: 5°C
Jul
9°
High: 14°C
Avg: 9°C
Low: 3°C
Aug
3°
High: 7°C
Avg: 3°C
Low: -2°C
Sep
-6°
High: -2°C
Avg: -6°C
Low: -10°C
Oct
-15°
High: -12°C
Avg: -15°C
Low: -18°C
Nov
-17°
High: -13°C
Avg: -17°C
Low: -21°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 30 mm 60 mm 90 mm
58 mm
58.4 mm
Jan
30 mm
30.5 mm
Feb
41 mm
40.6 mm
Mar
48 mm
48.3 mm
Apr
18 mm
17.8 mm
May
79 mm
78.7 mm
Jun
97 mm
96.5 mm
Jul
69 mm
68.6 mm
Aug
56 mm
55.9 mm
Sep
71 mm
71.1 mm
Oct
86 mm
86.4 mm
Nov
81 mm
81.3 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec5.5h8.5h11.5h14.5h17.5h20h19h16h12.5h9.5h6h4h
Jan: 9:22 AM – 2:38 PM · 5h 16m
Feb: 7:52 AM – 4:08 PM · 8h 16m
Mar: 6:22 AM – 5:38 PM · 11h 15m
Apr: 4:43 AM – 7:17 PM · 14h 34m
May: 3:10 AM – 8:50 PM · 17h 40m
Jun: 2:05 AM – 9:55 PM · 19h 50m
Jul: 2:34 AM – 9:26 PM · 18h 52m
Aug: 4:04 AM – 7:56 PM · 15h 53m
Sep: 5:42 AM – 6:18 PM · 12h 35m
Oct: 7:18 AM – 4:42 PM · 9h 23m
Nov: 8:54 AM – 3:06 PM · 6h 12m
Dec: 9:55 AM – 2:05 PM · 4h 09m
Daylight Longest: 19h 55m · Shortest: 4h 05m

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