Frost Dates for Cascadia, OR

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 29
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 6
First Fall Frost October 3

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze March 30
First Fall Hard Freeze November 5
44.39°N, -122.48°W © OpenStreetMap

Growing Season

167 Days April 29 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 8b

Learn more

Temperature

30° 50° 70°
39°
High: 45°
Avg: 39°
Low: 33°
Jan
41°
High: 50°
Avg: 41°
Low: 33°
Feb
44°
High: 54°
Avg: 44°
Low: 34°
Mar
48°
High: 58°
Avg: 48°
Low: 37°
Apr
54°
High: 65°
Avg: 54°
Low: 42°
May
58°
High: 70°
Avg: 58°
Low: 46°
Jun
64°
High: 79°
Avg: 64°
Low: 49°
Jul
64°
High: 80°
Avg: 64°
Low: 48°
Aug
59°
High: 74°
Avg: 59°
Low: 44°
Sep
51°
High: 62°
Avg: 51°
Low: 39°
Oct
43°
High: 50°
Avg: 43°
Low: 35°
Nov
38°
High: 44°
Avg: 38°
Low: 33°
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 3" 6" 9" 11.5"
10.1"
10.14"
Jan
8.2"
8.15"
Feb
9.1"
9.08"
Mar
8.1"
8.14"
Apr
8.5"
8.47"
May
6.5"
6.48"
Jun
4.0"
4.05"
Jul
4.4"
4.41"
Aug
7.4"
7.39"
Sep
9.2"
9.16"
Oct
11.1"
11.10"
Nov
11.5"
11.47"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:30 AM – 4:30 PM · 9h 01m
Feb: 6:53 AM – 5:07 PM · 10h 13m
Mar: 6:11 AM – 5:49 PM · 11h 38m
Apr: 5:23 AM – 6:37 PM · 13h 15m
May: 4:42 AM – 7:18 PM · 14h 36m
Jun: 4:20 AM – 7:40 PM · 15h 20m
Jul: 4:29 AM – 7:31 PM · 15h 02m
Aug: 5:04 AM – 6:56 PM · 13h 51m
Sep: 5:51 AM – 6:09 PM · 12h 17m
Oct: 6:38 AM – 5:22 PM · 10h 44m
Nov: 7:19 AM – 4:41 PM · 9h 21m
Dec: 7:40 AM – 4:20 PM · 8h 40m
Daylight Longest: 15h 21m · Shortest: 8h 39m

Nearby Stations

Foster Dam, OR April 12 - October 28 Lacomb 3 Nne, OR April 26 - October 24 Cougar Dam, OR March 2 - November 30 Leaburg 1 Sw, OR April 3 - November 11 Lebanon, ORMarch 14 - November 18 Belknap Springs 8 N, OR May 5 - October 12

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