Frost Dates for Harbor, OR

Based on data from Brookings weather station, 1 miles away

Elevation: 33 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. January 31
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. December 27

30% Probability

Only 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 February 23
First Fall Frost December 10

Hard Freeze (28°F)

Last Spring Hard Freeze January 3
First Fall Hard Freeze December 30
42.05°N, 124.27°W © OpenStreetMap

Growing Season

331 Days January 31 to December 27

USDA Hardiness Zone

Hardiness 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 10a

Avg. annual minimum: 30 to 35°F

Learn more

Köppen Climate

The 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

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January54°49°44°
February55°49°43°
March55°49°43°
April58°51°45°
May62°55°48°
June65°58°51°
July67°60°53°
August66°60°54°
September67°60°52°
October63°56°49°
November57°52°46°
December53°48°43°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January14.3
February12.2
March11.3
April8.1
May6.2
June4.2
July1.7
August1.4
September3.0
October6.9
November10.6
December14.5

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 15h 04m · Shortest: 8h 56m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:49 AM5:04 PM9h 16m
February7:21 AM5:43 PM10h 22m
March7:37 AM7:17 PM11h 40m
April6:43 AM7:52 PM13h 09m
May6:02 AM8:25 PM14h 23m
June5:46 AM8:49 PM15h 03m
July5:59 AM8:46 PM14h 47m
August6:30 AM8:12 PM13h 42m
September7:04 AM7:20 PM12h 16m
October7:37 AM6:27 PM10h 50m
November7:15 AM4:49 PM9h 34m
December7:45 AM4:41 PM8h 57m

Nearby Stations

Brookings 2 Se, OR January 31 - December 27 Crescent City 3 Nnw, CA March 11 - November 23 Crescent City Mcnamara AP, CA January 30 - December 25 Gold Beach Rs, OR February 16 - December 16 Cave Junction 1 Wnw, OR May 1 - October 12 Klamath, CAMarch 16 - November 20

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