Frost Dates for Kittitas, WA

Based on data from Ellensburg weather station, 6 miles away

Elevation: 1647 ft

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 8
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 14
First Fall Frost September 27

Hard Freeze (28°F)

Last Spring Hard Freeze April 23
First Fall Hard Freeze October 14
46.98°N, 120.42°W © OpenStreetMap

Growing Season

147 Days May 8 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.
BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

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
January35°28°20°
February43°33°22°
March52°40°28°
April60°47°34°
May69°56°42°
June76°62°48°
July85°69°54°
August85°68°52°
September76°60°43°
October62°48°34°
November46°36°26°
December35°28°20°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.4
February1.8
March1.7
April1.5
May1.6
June1.3
July0.4
August0.0
September0.8
October1.7
November1.8
December2.1

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 42m · Shortest: 8h 19m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:50 AM4:33 PM8h 43m
February7:15 AM5:18 PM10h 03m
March7:24 AM6:60 PM11h 36m
April6:21 AM7:43 PM13h 22m
May5:33 AM8:24 PM14h 51m
June5:12 AM8:52 PM15h 40m
July5:28 AM8:48 PM15h 20m
August6:05 AM8:07 PM14h 02m
September6:47 AM7:06 PM12h 19m
October7:29 AM6:06 PM10h 36m
November7:15 AM4:20 PM9h 05m
December7:48 AM4:08 PM8h 20m

Nearby Stations

Ellensburg Bowers Fld, WA April 28 - October 7 Selah 2 Ne, WAMay 5 - October 4 Cle Elum, WAMay 13 - September 25 Yakima #2, WAApril 8 - October 23 Yakima Air Terminal, WA May 8 - October 4 Wenatchee, WAApril 4 - October 28

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