Frost Dates for Thomsen River, 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. June 14
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. July 29
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 19
First Fall Frost July 19

Hard Freeze (−2°C)

Last Spring Hard Freeze June 7
First Fall Hard Freeze August 29
73.23°N, -119.53°W © OpenStreetMap

Growing Season

45 Days June 14 to July 29

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 1b

Avg. annual minimum: −55 to −50°F (−48 to −46°C)

Learn more

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

ET Tundra

No true summer — the warmest month averages below 10°C (50°F). Growing is limited to hardy greens, root crops, and cold-frames during the brief warm period. Permafrost restricts root depth.

Köppen climate map

Temperature

-40° -25° -10° 5°
-32°
High: -28°C
Avg: -32°C
Low: -36°C
Jan
-32°
High: -28°C
Avg: -32°C
Low: -36°C
Feb
-29°
High: -25°C
Avg: -29°C
Low: -34°C
Mar
-21°
High: -16°C
Avg: -21°C
Low: -26°C
Apr
-8°
High: -4°C
Avg: -8°C
Low: -12°C
May
4°
High: 7°C
Avg: 4°C
Low: 1°C
Jun
9°
High: 12°C
Avg: 9°C
Low: 5°C
Jul
6°
High: 9°C
Avg: 6°C
Low: 3°C
Aug
-2°
High: 1°C
Avg: -2°C
Low: -4°C
Sep
-13°
High: -9°C
Avg: -13°C
Low: -16°C
Oct
-23°
High: -19°C
Avg: -23°C
Low: -27°C
Nov
-29°
High: -25°C
Avg: -29°C
Low: -33°C
Dec
0°C
−2°C
Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)

Precipitation

0 mm 10 mm 20 mm 30 mm 40 mm
5 mm
5.1 mm
Jan
0 mm
0.0 mm
Feb
0 mm
0.0 mm
Mar
3 mm
2.5 mm
Apr
0 mm
0.0 mm
May
5 mm
5.1 mm
Jun
30 mm
30.5 mm
Jul
8 mm
7.6 mm
Aug
3 mm
2.5 mm
Sep
15 mm
15.2 mm
Oct
5 mm
5.1 mm
Nov
3 mm
2.5 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec0h5h10.5h16.5h24h24h24h19.5h13h7.5h0h0h
Jan: 0h (Polar Night)
Feb: 9:26 AM – 2:34 PM · 5h 07m
Mar: 6:38 AM – 5:22 PM · 10h 45m
Apr: 3:46 AM – 8:14 PM · 16h 27m
May: 24h (Midnight Sun)
Jun: 24h (Midnight Sun)
Jul: 24h (Midnight Sun)
Aug: 2:22 AM – 9:38 PM · 19h 16m
Sep: 5:30 AM – 6:30 PM · 12h 59m
Oct: 8:17 AM – 3:43 PM · 7h 27m
Nov: 0h (Polar Night)
Dec: 0h (Polar Night)
Daylight Longest: 24h 00m · Shortest: 0h 00m

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