Frost Dates for Colville, WA

Elevation: 474 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 2
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 2

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 8
First Fall Frost September 28

Hard Freeze (28°F)

Last Spring Hard Freeze April 15
First Fall Hard Freeze October 14
48.57°N, 117.94°W © OpenStreetMap

Growing Season

153 Days May 2 to October 2

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 6b

Avg. annual minimum: −5 to 0°F

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 (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January34°29°23°
February42°33°24°
March53°41°30°
April63°49°35°
May72°58°43°
June78°64°49°
July88°71°53°
August89°70°51°
September78°61°44°
October61°48°35°
November44°36°29°
December34°29°24°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January3.6
February2.8
March3.4
April3.0
May3.7
June4.3
July3.5
August2.8
September2.8
October3.0
November4.0
December4.6

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 55m · Shortest: 8h 05m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:46 AM4:16 PM8h 31m
February7:08 AM5:04 PM9h 56m
March7:14 AM6:49 PM11h 34m
April6:09 AM7:35 PM13h 27m
May5:17 AM8:19 PM15h 01m
June4:55 AM8:49 PM15h 54m
July5:11 AM8:43 PM15h 32m
August5:51 AM8:00 PM14h 09m
September6:36 AM6:56 PM12h 20m
October7:21 AM5:53 PM10h 32m
November7:10 AM4:04 PM8h 55m
December7:45 AM3:51 PM8h 06m

Nearby Stations

Chewelah, WAMay 16 - September 15 Northport, WAMay 8 - October 1 Billings, BCMay 3 - October 8 Republic, WAMay 30 - September 10 Warfield Rcs, BC April 30 - October 12 Boundary Dam, WAMay 4 - October 4

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