Frost Dates for Morton, WA

Based on data from Glenoma weather station, 7 miles away

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 24
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 15
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 1
First Fall Frost October 5

Hard Freeze (28°F)

Last Spring Hard Freeze March 26
First Fall Hard Freeze November 5
46.56°N, -122.28°W © OpenStreetMap

Growing Season

174 Days April 24 to October 15

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 8a

Avg. annual minimum: 10 to 15°F (−12 to −9°C)

Learn more

Köppen Climate iThe 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

30° 50° 70°
38°
High: 45°F
Avg: 38°F
Low: 32°F
Jan
40°
High: 49°F
Avg: 40°F
Low: 32°F
Feb
44°
High: 53°F
Avg: 44°F
Low: 34°F
Mar
48°
High: 59°F
Avg: 48°F
Low: 37°F
Apr
55°
High: 67°F
Avg: 55°F
Low: 42°F
May
59°
High: 72°F
Avg: 59°F
Low: 47°F
Jun
64°
High: 79°F
Avg: 64°F
Low: 50°F
Jul
64°
High: 80°F
Avg: 64°F
Low: 48°F
Aug
58°
High: 73°F
Avg: 58°F
Low: 44°F
Sep
50°
High: 61°F
Avg: 50°F
Low: 39°F
Oct
42°
High: 50°F
Avg: 42°F
Low: 34°F
Nov
38°
High: 44°F
Avg: 38°F
Low: 32°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 3" 6" 9.0"
7.8"
7.81"
Jan
6.6"
6.58"
Feb
6.9"
6.94"
Mar
6.4"
6.40"
Apr
5.9"
5.88"
May
4.0"
3.98"
Jun
2.5"
2.47"
Jul
2.6"
2.57"
Aug
3.9"
3.86"
Sep
6.2"
6.22"
Oct
8.4"
8.40"
Nov
9.0"
8.99"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h15h15.5h15.5h14h12.5h10.5h9h8.5h
Jan: 7:37 AM – 4:23 PM · 8h 46m
Feb: 6:58 AM – 5:02 PM · 10h 05m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:20 AM – 6:40 PM · 13h 21m
May: 4:36 AM – 7:24 PM · 14h 48m
Jun: 4:12 AM – 7:48 PM · 15h 36m
Jul: 4:22 AM – 7:38 PM · 15h 17m
Aug: 5:00 AM – 6:60 PM · 13h 60m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:41 AM – 5:19 PM · 10h 38m
Nov: 7:26 AM – 4:34 PM · 9h 08m
Dec: 7:48 AM – 4:12 PM · 8h 24m
Daylight Longest: 15h 38m · Shortest: 8h 22m

Nearby Stations

Mayfield Pwr Plt, WA April 7 - November 13 Longmire Rainier Nps, WA May 22 - October 3 Packwood, WAApril 30 - October 8 Rainier Paradise Rs, WA Cougar 6 E, WA April 1 - November 18 Toledo Faa AP, WA April 5 - October 25

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