Frost Dates for Smithers, BC

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 29
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 12
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 4
First Fall Frost September 6

Hard Freeze (−2°C)

Last Spring Hard Freeze May 5
First Fall Hard Freeze September 25
54.83°N, -127.18°W © OpenStreetMap

Growing Season

106 Days May 29 to September 12

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 4b

Avg. annual minimum: −25 to −20°F (−32 to −29°C)

Learn more

Köppen Climate iThe 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

-15° -5° 5° 15° 25°
-7°
High: -3°C
Avg: -7°C
Low: -11°C
Jan
-6°
High: -1°C
Avg: -6°C
Low: -10°C
Feb
0°
High: 5°C
Avg: 0°C
Low: -6°C
Mar
5°
High: 11°C
Avg: 5°C
Low: -1°C
Apr
10°
High: 17°C
Avg: 10°C
Low: 3°C
May
13°
High: 19°C
Avg: 13°C
Low: 6°C
Jun
15°
High: 22°C
Avg: 15°C
Low: 8°C
Jul
15°
High: 22°C
Avg: 15°C
Low: 7°C
Aug
10°
High: 17°C
Avg: 10°C
Low: 4°C
Sep
4°
High: 9°C
Avg: 4°C
Low: 0°C
Oct
-2°
High: 2°C
Avg: -2°C
Low: -5°C
Nov
-6°
High: -3°C
Avg: -6°C
Low: -10°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 60 mm
41 mm
40.6 mm
Jan
13 mm
12.7 mm
Feb
0 mm
0.0 mm
Mar
25 mm
25.4 mm
Apr
25 mm
25.4 mm
May
46 mm
45.7 mm
Jun
36 mm
35.6 mm
Jul
33 mm
33.0 mm
Aug
33 mm
33.0 mm
Sep
66 mm
66.0 mm
Oct
51 mm
50.8 mm
Nov
25 mm
25.4 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec7.5h9.5h11.5h14h16h17h16.5h14.5h12.5h10h8h7h
Jan: 8:14 AM – 3:46 PM · 7h 32m
Feb: 7:18 AM – 4:42 PM · 9h 23m
Mar: 6:16 AM – 5:44 PM · 11h 28m
Apr: 5:06 AM – 6:54 PM · 13h 49m
May: 4:04 AM – 7:56 PM · 15h 51m
Jun: 3:29 AM – 8:31 PM · 17h 02m
Jul: 3:44 AM – 8:16 PM · 16h 32m
Aug: 4:38 AM – 7:22 PM · 14h 43m
Sep: 5:47 AM – 6:13 PM · 12h 25m
Oct: 6:56 AM – 5:04 PM · 10h 09m
Nov: 7:58 AM – 4:02 PM · 8h 04m
Dec: 8:31 AM – 3:29 PM · 6h 58m
Daylight Longest: 17h 04m · Shortest: 6h 56m

Nearby Stations

Smithers A, BC May 27 - September 13 Suskwa Valley, BC June 1 - September 7 Houston, BCMay 31 - September 8 Topley Landing, BC May 24 - September 19 Terrace A, BC April 27 - October 18 Terrace Pcc, BC April 26 - October 17

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