Frost Dates for Upper Baker Dam, WA

Elevation: 210 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 24
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 29

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 April 30
First Fall Frost October 22

Hard Freeze (28°F)

Last Spring Hard Freeze March 28
First Fall Hard Freeze November 17
48.65°N, 121.69°W © OpenStreetMap

Growing Season

188 Days April 24 to October 29

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 8a

Avg. annual minimum: 10 to 15°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Csb Warm-Summer Mediterranean

Warm, dry summers and mild, wet winters. Similar to hot-summer Mediterranean but cooler. Great for a wide range of vegetables and fruit trees with moderate water needs.

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
January38°33°29°
February42°36°29°
March48°40°32°
April56°46°36°
May64°53°42°
June68°57°47°
July74°63°51°
August75°63°51°
September69°58°47°
October56°48°41°
November44°39°34°
December37°34°30°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January14.1
February9.7
March9.5
April7.2
May5.8
June4.2
July3.5
August4.0
September7.2
October12.1
November16.1
December16.4

Sunrise / Sunset

Daylight Longest: 15h 56m · Shortest: 8h 04m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:45 AM4:15 PM8h 30m
February7:02 AM4:58 PM9h 55m
March6:13 AM5:47 PM11h 34m
April5:17 AM6:43 PM13h 27m
May4:29 AM7:31 PM15h 02m
June4:03 AM7:57 PM15h 55m
July4:14 AM7:46 PM15h 33m
August4:55 AM7:05 PM14h 09m
September5:50 AM6:10 PM12h 20m
October6:44 AM5:16 PM10h 31m
November7:33 AM4:27 PM8h 54m
December7:57 AM4:03 PM8h 05m

Nearby Stations

Concrete Ppl Fish Stn, WA March 28 - November 14 Darrington 21 Nne, WA April 16 - October 25 Newhalem, WAApril 2 - November 14 Diablo Dam, WA April 10 - November 1 Sedro-Woolley, WA March 27 - November 6 Darrington Rs, WA April 16 - October 23

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