Frost Dates for Chemainus, 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. March 10
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 25
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 March 20
First Fall Frost November 17

Hard Freeze (−2°C)

Last Spring Hard Freeze February 9
First Fall Hard Freeze December 6
48.93°N, -123.75°W © OpenStreetMap

Growing Season

260 Days March 10 to November 25

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 9a

Avg. annual minimum: 20 to 25°F (−7 to −4°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°
5°
High: 7°C
Avg: 5°C
Low: 2°C
Jan
5°
High: 8°C
Avg: 5°C
Low: 2°C
Feb
7°
High: 11°C
Avg: 7°C
Low: 4°C
Mar
10°
High: 14°C
Avg: 10°C
Low: 6°C
Apr
14°
High: 18°C
Avg: 14°C
Low: 9°C
May
16°
High: 21°C
Avg: 16°C
Low: 12°C
Jun
19°
High: 24°C
Avg: 19°C
Low: 14°C
Jul
19°
High: 24°C
Avg: 19°C
Low: 14°C
Aug
16°
High: 20°C
Avg: 16°C
Low: 12°C
Sep
11°
High: 14°C
Avg: 11°C
Low: 8°C
Oct
7°
High: 9°C
Avg: 7°C
Low: 4°C
Nov
4°
High: 6°C
Avg: 4°C
Low: 2°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 75 mm 150 mm 225 mm
241 mm
241.3 mm
Jan
122 mm
121.9 mm
Feb
142 mm
142.2 mm
Mar
76 mm
76.2 mm
Apr
43 mm
43.2 mm
May
33 mm
33.0 mm
Jun
13 mm
12.7 mm
Jul
20 mm
20.3 mm
Aug
56 mm
55.9 mm
Sep
142 mm
142.2 mm
Oct
211 mm
210.8 mm
Nov
226 mm
226.1 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h16h15.5h14h12.5h10.5h9h8h
Jan: 7:46 AM – 4:14 PM · 8h 28m
Feb: 7:03 AM – 4:57 PM · 9h 54m
Mar: 6:13 AM – 5:47 PM · 11h 34m
Apr: 5:16 AM – 6:44 PM · 13h 28m
May: 4:28 AM – 7:32 PM · 15h 04m
Jun: 4:01 AM – 7:59 PM · 15h 57m
Jul: 4:12 AM – 7:48 PM · 15h 35m
Aug: 4:55 AM – 7:05 PM · 14h 11m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:45 AM – 5:15 PM · 10h 30m
Nov: 7:34 AM – 4:26 PM · 8h 52m
Dec: 7:59 AM – 4:01 PM · 8h 03m
Daylight Longest: 15h 59m · Shortest: 8h 01m

Nearby Stations

Galiano North, BC February 22 - November 27 Nanaimo A, BC April 15 - October 27 Saltspring St Mary'S L, BC March 10 - November 29 Ganges Mansell Rd, BC April 7 - November 5 Duncan Kelvin Creek, BC April 25 - October 23 Gabriola Island, BC April 20 - October 21

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