Frost Dates for Connell 1 W, WA

Elevation: 311 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 6
First Fall Frost October 6

Hard Freeze (28°F)

Last Spring Hard Freeze April 10
First Fall Hard Freeze October 24
46.66°N, 118.88°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: 0 to 5°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
January39°33°27°
February46°38°29°
March56°44°32°
April65°51°37°
May74°59°44°
June80°65°50°
July90°72°55°
August88°72°55°
September79°63°47°
October64°51°38°
November48°39°31°
December39°33°27°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.2
February1.9
March1.9
April1.8
May1.9
June2.1
July1.4
August0.0
September0.5
October1.9
November2.1
December2.2

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 39m · Shortest: 8h 21m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:42 AM4:27 PM8h 45m
February7:08 AM5:12 PM10h 04m
March7:17 AM6:53 PM11h 36m
April6:15 AM7:36 PM13h 21m
May5:27 AM8:16 PM14h 49m
June5:07 AM8:44 PM15h 37m
July5:22 AM8:40 PM15h 18m
August5:59 AM7:60 PM14h 01m
September6:41 AM6:59 PM12h 19m
October7:22 AM5:59 PM10h 37m
November7:07 AM4:14 PM9h 07m
December7:40 AM4:03 PM8h 22m

Nearby Stations

Hatton 9 Se, WA April 25 - October 15 Sagemoor, WAApril 30 - October 13 Eltopia 8 Wsw, WA April 21 - October 22 Lind 3 Ne, WAMay 7 - October 4 Ice Harbor Dam, WA April 7 - October 22 Pasco Tri Cities AP, WA April 27 - October 11

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