Frost Dates for Yellowknife A, NT

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. May 23
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. September 22
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 May 28
First Fall Frost September 17

Hard Freeze (−2°C)

Last Spring Hard Freeze May 18
First Fall Hard Freeze October 4
62.47°N, -114.43°W © OpenStreetMap

Growing Season

122 Days May 23 to September 22

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 2b

Avg. annual minimum: −45 to −40°F (−43 to −40°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfc Subarctic

Short, cool summers and long, very cold winters. Growing seasons of 3–4 months require fast-maturing varieties. Root vegetables, potatoes, and cold-hardy greens are the most reliable.

Köppen climate map

Temperature

-30° -15° 0° 15°
-25°
High: -22°C
Avg: -25°C
Low: -29°C
Jan
-22°
High: -18°C
Avg: -22°C
Low: -27°C
Feb
-17°
High: -11°C
Avg: -17°C
Low: -23°C
Mar
-5°
High: 1°C
Avg: -5°C
Low: -11°C
Apr
5°
High: 10°C
Avg: 5°C
Low: 0°C
May
14°
High: 18°C
Avg: 14°C
Low: 9°C
Jun
17°
High: 22°C
Avg: 17°C
Low: 13°C
Jul
14°
High: 18°C
Avg: 14°C
Low: 11°C
Aug
8°
High: 11°C
Avg: 8°C
Low: 5°C
Sep
-1°
High: 1°C
Avg: -1°C
Low: -4°C
Oct
-12°
High: -9°C
Avg: -12°C
Low: -16°C
Nov
-21°
High: -17°C
Avg: -21°C
Low: -25°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 20 mm 40 mm
0 mm
0.0 mm
Jan
0 mm
0.0 mm
Feb
3 mm
2.5 mm
Mar
0 mm
0.0 mm
Apr
3 mm
2.5 mm
May
18 mm
17.8 mm
Jun
28 mm
27.9 mm
Jul
38 mm
38.1 mm
Aug
43 mm
43.2 mm
Sep
15 mm
15.2 mm
Oct
10 mm
10.2 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec5.5h8.5h11.5h14.5h17.5h19.5h18.5h15.5h12.5h9.5h6.5h4.5h
Jan: 9:13 AM – 2:47 PM · 5h 34m
Feb: 7:48 AM – 4:12 PM · 8h 24m
Mar: 6:22 AM – 5:38 PM · 11h 17m
Apr: 4:46 AM – 7:14 PM · 14h 28m
May: 3:17 AM – 8:43 PM · 17h 26m
Jun: 2:17 AM – 9:43 PM · 19h 26m
Jul: 2:43 AM – 9:17 PM · 18h 33m
Aug: 4:08 AM – 7:52 PM · 15h 45m
Sep: 5:43 AM – 6:17 PM · 12h 34m
Oct: 7:16 AM – 4:44 PM · 9h 29m
Nov: 8:47 AM – 3:13 PM · 6h 26m
Dec: 9:43 AM – 2:17 PM · 4h 33m
Daylight Longest: 19h 31m · Shortest: 4h 30m

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview