Frost Dates for Castlegar, BC

Based on data from Castlegar A weather station, 2 miles away

Elevation: 495 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. May 1
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 7

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 May 6
First Fall Frost October 2

Hard Freeze (−2°C)

Last Spring Hard Freeze April 15
First Fall Hard Freeze October 21
49.32°N, 117.66°W © OpenStreetMap

Growing Season

159 Days May 1 to October 7

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 7a

Avg. annual minimum: −18 to −15°C

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsb Warm-Summer Continental (Dry Summer)

Warm, dry summers and cold, snowy winters. Common in mountain regions. Moderate growing season with irrigation needs in summer.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (0°C) Hard Frost (−2°C)
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January0°-2°-4°
February3°0°-4°
March9°4°-1°
April15°9°2°
May21°14°7°
June24°17°10°
July29°21°13°
August29°21°12°
September22°15°8°
October13°8°3°
November5°2°0°
December0°-2°-4°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January79
February56
March79
April58
May61
June79
July33
August10
September33
October64
November84
December89

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 16h 02m · Shortest: 7h 58m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:48 AM4:12 PM8h 25m
February7:09 AM5:01 PM9h 52m
March7:13 AM6:47 PM11h 34m
April6:06 AM7:35 PM13h 29m
May5:14 AM8:20 PM15h 06m
June4:50 AM8:51 PM16h 01m
July5:07 AM8:45 PM15h 38m
August5:48 AM8:01 PM14h 13m
September6:35 AM6:55 PM12h 21m
October7:21 AM5:50 PM10h 29m
November7:11 AM4:00 PM8h 50m
December7:47 AM3:46 PM7h 59m

Nearby Stations

Castlegar Bchpa Dam, BC April 14 - October 22 Warfield Rcs, BC April 30 - October 12 Nelson Rixen Creek, BC May 8 - October 7 Nelson Cs, BC April 20 - October 18 Boundary Dam, WAMay 4 - October 4 Nelson Ne, BC April 24 - October 18

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