Frost Dates for Rossland, BC

Based on data from Warfield Rcs weather station, 4 miles away

Elevation: 1023 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 30
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 12

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 7
First Fall Frost October 7

Hard Freeze (−2°C)

Last Spring Hard Freeze April 6
First Fall Hard Freeze October 23
49.08°N, 117.80°W © OpenStreetMap

Growing Season

165 Days April 30 to October 12

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°3°
May21°14°7°
June25°17°10°
July30°22°13°
August31°21°12°
September23°16°8°
October13°8°3°
November5°2°-1°
December0°-2°-4°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January99
February69
March69
April38
May48
June58
July13
August10
September23
October64
November76
December91

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 16h 01m · Shortest: 7h 60m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:47 AM4:13 PM8h 26m
February7:09 AM5:02 PM9h 53m
March7:14 AM6:48 PM11h 34m
April6:07 AM7:35 PM13h 28m
May5:15 AM8:20 PM15h 05m
June4:52 AM8:51 PM15h 59m
July5:08 AM8:45 PM15h 37m
August5:49 AM8:01 PM14h 12m
September6:35 AM6:56 PM12h 21m
October7:21 AM5:51 PM10h 30m
November7:11 AM4:01 PM8h 51m
December7:46 AM3:47 PM8h 01m

Nearby Stations

Castlegar A, BCMay 1 - October 7 Northport, WAMay 8 - October 1 Castlegar Bchpa Dam, BC April 14 - October 22 Boundary Dam, WAMay 4 - October 4 Billings, BCMay 3 - October 8 Nelson Rixen Creek, BC May 8 - October 7

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