Frost Dates for Spokane 17 Ssw, WA

Elevation: 691 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 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. September 4

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 June 13
First Fall Frost August 30

Hard Freeze (28°F)

Last Spring Hard Freeze May 5
First Fall Hard Freeze September 15
47.42°N, 117.53°W © OpenStreetMap

Growing Season

97 Days May 30 to September 4

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
January36°29°22°
February40°31°22°
March49°38°27°
April57°44°32°
May67°52°38°
June73°57°42°
July84°64°45°
August84°63°43°
September74°55°35°
October59°44°29°
November43°34°25°
December35°28°21°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January3.5
February3.1
March3.7
April2.8
May2.5
June2.8
July1.0
August0.6
September2.1
October3.3
November3.3
December3.7

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 45m · Shortest: 8h 15m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:40 AM4:19 PM8h 40m
February7:04 AM5:05 PM10h 01m
March7:12 AM6:47 PM11h 35m
April6:09 AM7:32 PM13h 23m
May5:19 AM8:13 PM14h 54m
June4:58 AM8:42 PM15h 44m
July5:14 AM8:37 PM15h 23m
August5:52 AM7:56 PM14h 04m
September6:35 AM6:54 PM12h 19m
October7:18 AM5:53 PM10h 35m
November7:04 AM4:06 PM9h 02m
December7:38 AM3:54 PM8h 16m

Nearby Stations

Spokane Intl AP, WA April 26 - October 12 Rosalia, WAMay 7 - September 28 Spokane Wfo, WA May 10 - September 26 Spokane Felts Fld, WA April 26 - October 15 St John, WAApril 29 - October 4 Plummer 3 Wsw, ID May 11 - October 5

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview