Frost Dates for Seattle Boeing Fld, 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. March 13
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. November 17
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 March 21
First Fall Frost November 10

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze February 18
First Fall Hard Freeze December 2
47.53°N, -122.30°W © OpenStreetMap

Growing Season

249 Days March 13 to November 17

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 8b

Learn more

Temperature

30° 50° 70°
43°
High: 49°
Avg: 43°
Low: 37°
Jan
44°
High: 51°
Avg: 44°
Low: 37°
Feb
47°
High: 55°
Avg: 47°
Low: 39°
Mar
52°
High: 60°
Avg: 52°
Low: 44°
Apr
58°
High: 67°
Avg: 58°
Low: 49°
May
63°
High: 71°
Avg: 63°
Low: 54°
Jun
67°
High: 77°
Avg: 67°
Low: 58°
Jul
68°
High: 77°
Avg: 68°
Low: 58°
Aug
63°
High: 72°
Avg: 63°
Low: 54°
Sep
54°
High: 61°
Avg: 54°
Low: 46°
Oct
46°
High: 53°
Avg: 46°
Low: 40°
Nov
42°
High: 48°
Avg: 42°
Low: 36°
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 2" 4" 5.1"
4.8"
4.75"
Jan
3.9"
3.90"
Feb
4.2"
4.24"
Mar
3.4"
3.35"
Apr
2.9"
2.91"
May
2.2"
2.17"
Jun
1.7"
1.71"
Jul
2.1"
2.11"
Aug
2.1"
2.12"
Sep
3.5"
3.52"
Oct
5.1"
5.12"
Nov
5.0"
5.04"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:41 AM – 4:19 PM · 8h 39m
Feb: 6:60 AM – 5:00 PM · 10h 00m
Mar: 6:12 AM – 5:48 PM · 11h 35m
Apr: 5:18 AM – 6:42 PM · 13h 23m
May: 4:33 AM – 7:27 PM · 14h 55m
Jun: 4:08 AM – 7:52 PM · 15h 45m
Jul: 4:18 AM – 7:42 PM · 15h 24m
Aug: 4:58 AM – 7:02 PM · 14h 04m
Sep: 5:50 AM – 6:10 PM · 12h 19m
Oct: 6:43 AM – 5:17 PM · 10h 35m
Nov: 7:29 AM – 4:31 PM · 9h 02m
Dec: 7:52 AM – 4:08 PM · 8h 15m
Daylight Longest: 15h 46m · Shortest: 8h 14m

Nearby Stations

Renton Muni AP, WA March 13 - November 16 Seattle Tacoma Intl AP, WA March 2 - November 23 Kent, WAMarch 20 - November 10 Seattle Sand Pt Wsfo, WA March 8 - November 23 Bremerton, WA March 29 - November 14 Landsburg, WA April 20 - October 25

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