Frost Dates for Wallowa, OR

Elevation: 891 m

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. June 7
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. September 9

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 June 18
First Fall Frost September 3

Hard Freeze (28°F)

Last Spring Hard Freeze May 11
First Fall Hard Freeze September 24
45.57°N, 117.53°W © OpenStreetMap

Growing Season

94 Days June 7 to September 9

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 6a

Avg. annual minimum: −10 to −5°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsb Warm-Summer Continental (Dry Summer)

Warm, dry summers and cold, snowy winters. Common in mountain regions. Moderate growing season with irrigation needs in summer.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January36°28°20°
February43°33°22°
March52°40°27°
April60°46°32°
May69°54°38°
June77°60°43°
July88°67°47°
August88°67°45°
September79°59°38°
October63°47°31°
November46°35°25°
December36°28°19°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.5
February2.0
March2.5
April2.7
May3.0
June2.9
July2.3
August2.5
September2.3
October2.5
November2.4
December2.6

Sunrise / Sunset

Daylight Longest: 15h 30m · Shortest: 8h 30m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:34 AM4:26 PM8h 53m
February6:56 AM5:04 PM10h 08m
March6:12 AM5:48 PM11h 37m
April5:21 AM6:39 PM13h 18m
May4:39 AM7:21 PM14h 42m
June4:16 AM7:44 PM15h 29m
July4:25 AM7:35 PM15h 10m
August5:02 AM6:58 PM13h 56m
September5:51 AM6:09 PM12h 18m
October6:40 AM5:20 PM10h 41m
November7:23 AM4:37 PM9h 14m
December7:44 AM4:16 PM8h 31m

Nearby Stations

Elgin, ORMay 24 - September 18 Enterprise 20 Nne, OR June 8 - September 5 Joseph, ORMay 24 - October 1 Union, ORMay 11 - September 26 La Grande, ORMay 6 - October 1 Meacham, OR

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