Frost Dates for Fort St James, 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 24
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 13
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 29
First Fall Frost September 4

Hard Freeze (−2°C)

Last Spring Hard Freeze May 7
First Fall Hard Freeze September 25
54.45°N, -124.28°W © OpenStreetMap

Growing Season

112 Days May 24 to September 13

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 3b

Avg. annual minimum: −35 to −30°F (−37 to −34°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°
-10°
High: -6°C
Avg: -10°C
Low: -14°C
Jan
-7°
High: -1°C
Avg: -7°C
Low: -12°C
Feb
-2°
High: 4°C
Avg: -2°C
Low: -8°C
Mar
4°
High: 10°C
Avg: 4°C
Low: -2°C
Apr
9°
High: 16°C
Avg: 9°C
Low: 3°C
May
13°
High: 19°C
Avg: 13°C
Low: 7°C
Jun
15°
High: 22°C
Avg: 15°C
Low: 9°C
Jul
15°
High: 21°C
Avg: 15°C
Low: 8°C
Aug
10°
High: 16°C
Avg: 10°C
Low: 4°C
Sep
4°
High: 9°C
Avg: 4°C
Low: -1°C
Oct
-2°
High: 1°C
Avg: -2°C
Low: -6°C
Nov
-8°
High: -4°C
Avg: -8°C
Low: -12°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
51 mm
50.8 mm
Jan
20 mm
20.3 mm
Feb
15 mm
15.2 mm
Mar
10 mm
10.2 mm
Apr
28 mm
27.9 mm
May
48 mm
48.3 mm
Jun
53 mm
53.3 mm
Jul
53 mm
53.3 mm
Aug
38 mm
38.1 mm
Sep
53 mm
53.3 mm
Oct
43 mm
43.2 mm
Nov
51 mm
50.8 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec7.5h9.5h11.5h14h16h17h16.5h14.5h12.5h10h8h7h
Jan: 8:12 AM – 3:48 PM · 7h 36m
Feb: 7:17 AM – 4:43 PM · 9h 26m
Mar: 6:16 AM – 5:44 PM · 11h 28m
Apr: 5:06 AM – 6:54 PM · 13h 47m
May: 4:06 AM – 7:54 PM · 15h 47m
Jun: 3:32 AM – 8:28 PM · 16h 57m
Jul: 3:46 AM – 8:14 PM · 16h 28m
Aug: 4:40 AM – 7:20 PM · 14h 41m
Sep: 5:48 AM – 6:12 PM · 12h 25m
Oct: 6:55 AM – 5:05 PM · 10h 10m
Nov: 7:56 AM – 4:04 PM · 8h 07m
Dec: 8:29 AM – 3:31 PM · 7h 03m
Daylight Longest: 16h 59m · Shortest: 7h 01m

Nearby Stations

Vanderhoof, BC May 21 - September 12 Fraser Lake North Shore, BC May 25 - September 13 Babine Lake Pinkut Creek, BC May 19 - September 22 Burns Lake Decker Lake, BC June 21 - July 26 Mackenzie A, BC May 27 - September 4 Ootsa L Skins L Spillway, BC June 5 - September 8

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