Frost Dates for Dayton 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. April 28
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. October 13
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 4
First Fall Frost October 7

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze April 6
First Fall Hard Freeze October 25
46.32°N, -118.00°W © OpenStreetMap

Growing Season

168 Days April 28 to October 13

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 7a

Learn more

Temperature

20° 40° 60° 80°
34°
High: 42°
Avg: 34°
Low: 26°
Jan
37°
High: 46°
Avg: 37°
Low: 28°
Feb
44°
High: 54°
Avg: 44°
Low: 33°
Mar
49°
High: 61°
Avg: 49°
Low: 38°
Apr
57°
High: 70°
Avg: 57°
Low: 45°
May
63°
High: 77°
Avg: 63°
Low: 50°
Jun
71°
High: 88°
Avg: 71°
Low: 55°
Jul
70°
High: 87°
Avg: 70°
Low: 54°
Aug
62°
High: 77°
Avg: 62°
Low: 47°
Sep
51°
High: 63°
Avg: 51°
Low: 38°
Oct
40°
High: 49°
Avg: 40°
Low: 31°
Nov
34°
High: 41°
Avg: 34°
Low: 27°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.1"
2.8"
2.79"
Jan
2.4"
2.41"
Feb
3.1"
3.15"
Mar
2.8"
2.80"
Apr
3.0"
3.00"
May
2.7"
2.70"
Jun
1.4"
1.44"
Jul
0.8"
0.81"
Aug
2.3"
2.30"
Sep
2.8"
2.76"
Oct
3.0"
3.00"
Nov
3.1"
3.10"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:36 AM – 4:24 PM · 8h 48m
Feb: 6:57 AM – 5:03 PM · 10h 05m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 20m
May: 4:37 AM – 7:23 PM · 14h 47m
Jun: 4:13 AM – 7:47 PM · 15h 35m
Jul: 4:22 AM – 7:38 PM · 15h 15m
Aug: 5:00 AM – 6:60 PM · 13h 59m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 38m
Nov: 7:25 AM – 4:35 PM · 9h 09m
Dec: 7:47 AM – 4:13 PM · 8h 25m
Daylight Longest: 15h 36m · Shortest: 8h 24m

Nearby Stations

Walla Walla Rgnl AP, WA March 27 - October 31 Pomeroy, WAMay 2 - October 4 Whitman Mission, WA May 2 - October 1 Milton Freewater, OR March 25 - October 29 Lacrosse, WAMay 13 - September 26 Hatton 9 Se, WA April 25 - October 15

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