Frost Dates for Denman Island, BC

Based on data from Mud Bay weather station, 5 miles away

Elevation: 8 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 15
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. October 28

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 22
First Fall Frost October 22

Hard Freeze (−2°C)

Last Spring Hard Freeze February 28
First Fall Hard Freeze November 17
49.53°N, 124.82°W © OpenStreetMap

Growing Season

196 Days April 15 to October 28

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°1°
February7°4°0°
March10°6°2°
April14°9°4°
May18°13°7°
June21°15°10°
July24°18°12°
August23°18°12°
September20°14°9°
October14°9°5°
November9°6°2°
December6°4°1°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January287
February170
March150
April99
May43
June36
July18
August38
September64
October175
November262
December300

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 16h 04m · Shortest: 7h 56m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January8:17 AM4:40 PM8h 23m
February7:38 AM5:30 PM9h 52m
March7:42 AM7:16 PM11h 34m
April6:35 AM8:04 PM13h 29m
May5:42 AM8:49 PM15h 08m
June5:18 AM9:20 PM16h 02m
July5:35 AM9:15 PM15h 40m
August6:17 AM8:30 PM14h 13m
September7:03 AM7:24 PM12h 21m
October7:50 AM6:19 PM10h 29m
November7:40 AM4:28 PM8h 48m
December8:16 AM4:14 PM7h 58m

Nearby Stations

Qualicum R Fish Research, BC April 11 - October 29 Port Alberni (Aut), BC April 26 - October 23 Alberni Robertson Creek, BC April 25 - October 27 Little Qualicum Hatchery, BC May 1 - October 9 Sisters Island, BC February 7 - December 7 Comox A, BCMarch 31 - November 7

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