Frost Dates for Sisters Island, 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. February 7
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. December 7
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 February 18
First Fall Frost December 2
49.48°N, -124.43°W © OpenStreetMap

Growing Season

304 Days February 7 to December 7

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 9b

Avg. annual minimum: 25 to 30°F (−4 to −1°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°
6°
High: 7°C
Avg: 6°C
Low: 5°C
Jan
6°
High: 8°C
Avg: 6°C
Low: 4°C
Feb
7°
High: 9°C
Avg: 7°C
Low: 6°C
Mar
10°
High: 12°C
Avg: 10°C
Low: 8°C
Apr
13°
High: 16°C
Avg: 13°C
Low: 11°C
May
16°
High: 18°C
Avg: 16°C
Low: 14°C
Jun
18°
High: 21°C
Avg: 18°C
Low: 16°C
Jul
19°
High: 21°C
Avg: 19°C
Low: 16°C
Aug
16°
High: 18°C
Avg: 16°C
Low: 14°C
Sep
11°
High: 13°C
Avg: 11°C
Low: 10°C
Oct
8°
High: 10°C
Avg: 8°C
Low: 7°C
Nov
6°
High: 7°C
Avg: 6°C
Low: 5°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 50 mm 100 mm
81 mm
81.3 mm
Jan
18 mm
17.8 mm
Feb
58 mm
58.4 mm
Mar
20 mm
20.3 mm
Apr
5 mm
5.1 mm
May
13 mm
12.7 mm
Jun
8 mm
7.6 mm
Jul
3 mm
2.5 mm
Aug
18 mm
17.8 mm
Sep
109 mm
109.2 mm
Oct
33 mm
33.0 mm
Nov
48 mm
48.3 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h16h15.5h14h12.5h10.5h9h8h
Jan: 7:48 AM – 4:12 PM · 8h 23m
Feb: 7:04 AM – 4:56 PM · 9h 52m
Mar: 6:13 AM – 5:47 PM · 11h 34m
Apr: 5:15 AM – 6:45 PM · 13h 30m
May: 4:26 AM – 7:34 PM · 15h 08m
Jun: 3:59 AM – 8:01 PM · 16h 02m
Jul: 4:10 AM – 7:50 PM · 15h 40m
Aug: 4:53 AM – 7:07 PM · 14h 13m
Sep: 5:50 AM – 6:10 PM · 12h 21m
Oct: 6:46 AM – 5:14 PM · 10h 29m
Nov: 7:36 AM – 4:24 PM · 8h 48m
Dec: 8:01 AM – 3:59 PM · 7h 57m
Daylight Longest: 16h 04m · Shortest: 7h 56m

Nearby Stations

Little Qualicum Hatchery, BC May 1 - October 9 Qualicum R Fish Research, BC April 11 - October 29 Coombs, BCMay 3 - October 9 Mud Bay, BCApril 15 - October 28 Merry Island Lightstation, BC February 17 - December 9 Port Alberni Cox Lake, BC April 29 - October 20

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