Frost Dates for Winthrop 1 Wsw, WA

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 15
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. September 22
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 22
First Fall Frost September 17

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 1
First Fall Hard Freeze October 3
48.47°N, -120.19°W © OpenStreetMap

Growing Season

130 Days May 15 to September 22

USDA Hardiness Zone iHardiness 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 5b

Learn more

Temperature

10° 30° 50° 70° 90°
23°
High: 30°
Avg: 23°
Low: 15°
Jan
28°
High: 38°
Avg: 28°
Low: 18°
Feb
38°
High: 50°
Avg: 38°
Low: 25°
Mar
47°
High: 61°
Avg: 47°
Low: 32°
Apr
55°
High: 71°
Avg: 55°
Low: 40°
May
61°
High: 77°
Avg: 61°
Low: 46°
Jun
68°
High: 86°
Avg: 68°
Low: 51°
Jul
67°
High: 86°
Avg: 67°
Low: 49°
Aug
59°
High: 77°
Avg: 59°
Low: 41°
Sep
46°
High: 61°
Avg: 46°
Low: 32°
Oct
33°
High: 41°
Avg: 33°
Low: 25°
Nov
22°
High: 29°
Avg: 22°
Low: 15°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.4"
3.4"
3.37"
Jan
2.8"
2.80"
Feb
2.9"
2.88"
Mar
2.1"
2.11"
Apr
2.4"
2.44"
May
2.3"
2.34"
Jun
1.9"
1.90"
Jul
1.6"
1.58"
Aug
1.5"
1.53"
Sep
2.1"
2.15"
Oct
2.7"
2.67"
Nov
3.4"
3.38"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h16h14h12h11h9h8h
Jan: 7:44 AM – 4:16 PM · 8h 31m
Feb: 7:02 AM – 4:58 PM · 9h 56m
Mar: 6:13 AM – 5:47 PM · 11h 35m
Apr: 5:17 AM – 6:43 PM · 13h 26m
May: 4:30 AM – 7:30 PM · 15h 01m
Jun: 4:04 AM – 7:56 PM · 15h 53m
Jul: 4:14 AM – 7:46 PM · 15h 32m
Aug: 4:56 AM – 7:04 PM · 14h 09m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:44 AM – 5:16 PM · 10h 32m
Nov: 7:32 AM – 4:28 PM · 8h 55m
Dec: 7:57 AM – 4:03 PM · 8h 07m
Daylight Longest: 15h 55m · Shortest: 8h 05m

Nearby Stations

Mazama, WAMay 9 - September 29 Stehekin 4 Nw, WA April 27 - October 17 Methow 2 S, WA April 21 - October 15 Omak AP, WAApril 30 - October 7 Holden Village, WA May 25 - September 19 Tonasket 4 Nne, WA April 26 - October 10

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