Frost Dates for Cowichan Lake Forestry, 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. April 21
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. November 2
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 April 28
First Fall Frost October 27

Hard Freeze (−2°C)

Last Spring Hard Freeze March 9
First Fall Hard Freeze November 19
48.82°N, -124.13°W © OpenStreetMap

Growing Season

195 Days April 21 to November 2

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 8b

Avg. annual minimum: 15 to 20°F (−9 to −7°C)

Learn more

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

Csb Warm-Summer Mediterranean

Warm, dry summers and mild, wet winters. Similar to hot-summer Mediterranean but cooler. Great for a wide range of vegetables and fruit trees with moderate water needs.

Köppen climate map

Temperature

0° 10° 20°
3°
High: 6°C
Avg: 3°C
Low: 0°C
Jan
4°
High: 8°C
Avg: 4°C
Low: 0°C
Feb
6°
High: 10°C
Avg: 6°C
Low: 2°C
Mar
8°
High: 13°C
Avg: 8°C
Low: 4°C
Apr
12°
High: 18°C
Avg: 12°C
Low: 7°C
May
15°
High: 20°C
Avg: 15°C
Low: 10°C
Jun
18°
High: 24°C
Avg: 18°C
Low: 12°C
Jul
18°
High: 25°C
Avg: 18°C
Low: 12°C
Aug
16°
High: 22°C
Avg: 16°C
Low: 9°C
Sep
10°
High: 14°C
Avg: 10°C
Low: 6°C
Oct
6°
High: 9°C
Avg: 6°C
Low: 3°C
Nov
3°
High: 6°C
Avg: 3°C
Low: 1°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 100 mm 200 mm 300 mm 400 mm
378 mm
378.5 mm
Jan
231 mm
231.1 mm
Feb
249 mm
248.9 mm
Mar
152 mm
152.4 mm
Apr
81 mm
81.3 mm
May
48 mm
48.3 mm
Jun
33 mm
33.0 mm
Jul
43 mm
43.2 mm
Aug
69 mm
68.6 mm
Sep
226 mm
226.1 mm
Oct
358 mm
358.1 mm
Nov
373 mm
373.4 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h16h15.5h14h12.5h10.5h9h8h
Jan: 7:46 AM – 4:14 PM · 8h 29m
Feb: 7:03 AM – 4:57 PM · 9h 55m
Mar: 6:13 AM – 5:47 PM · 11h 34m
Apr: 5:16 AM – 6:44 PM · 13h 27m
May: 4:28 AM – 7:32 PM · 15h 03m
Jun: 4:02 AM – 7:58 PM · 15h 56m
Jul: 4:13 AM – 7:47 PM · 15h 34m
Aug: 4:55 AM – 7:05 PM · 14h 10m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:45 AM – 5:15 PM · 10h 31m
Nov: 7:34 AM – 4:26 PM · 8h 53m
Dec: 7:58 AM – 4:02 PM · 8h 04m
Daylight Longest: 15h 58m · Shortest: 8h 02m

Nearby Stations

Port Renfrew, BC April 11 - October 31 Duncan Kelvin Creek, BC April 25 - October 23 Chemainus, BC March 10 - November 25 Nanaimo A, BC April 15 - October 27 Nitinat River Hatchery, BC April 21 - October 23 Shawnigan Lake, BC April 7 - November 6

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