Frost Dates for Mill Bay, BC

Based on data from Shawnigan Lake weather station, 4 miles away

Elevation: 2 m

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 7
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. November 6

30% Probability

Only 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 14
First Fall Frost October 30

Hard Freeze (−2°C)

Last Spring Hard Freeze February 28
First Fall Hard Freeze November 23
48.65°N, 123.55°W © OpenStreetMap

Growing Season

213 Days April 7 to November 6

USDA Hardiness Zone

Hardiness 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: −9 to −7°C

Learn more

Köppen Climate

The 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

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January6°3°0°
February8°4°0°
March10°6°2°
April14°9°4°
May18°13°7°
June21°15°10°
July24°18°12°
August24°18°12°
September21°15°10°
October14°10°6°
November9°6°3°
December6°3°1°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January221
February127
March124
April71
May48
June28
July5
August10
September46
October124
November203
December203

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 56m · Shortest: 8h 04m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January8:09 AM4:39 PM8h 30m
February7:31 AM5:27 PM9h 55m
March7:37 AM7:11 PM11h 34m
April6:31 AM7:58 PM13h 27m
May5:40 AM8:42 PM15h 02m
June5:17 AM9:12 PM15h 55m
July5:34 AM9:07 PM15h 33m
August6:14 AM8:23 PM14h 09m
September6:59 AM7:19 PM12h 20m
October7:44 AM6:15 PM10h 31m
November7:33 AM4:27 PM8h 54m
December8:08 AM4:13 PM8h 05m

Nearby Stations

Duncan Kelvin Creek, BC April 25 - October 23 Malahat, BCMarch 23 - November 15 Victoria Int'L A, BC April 2 - November 6 Saanichton Cda, BC March 18 - November 19 Victoria Highland, BC April 25 - October 29 Ganges Mansell Rd, BC April 7 - November 5

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