Frost Dates for Howard Prairie Dam, OR

Elevation: 1392 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 8
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 24

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 17
First Fall Frost September 16

Hard Freeze (28°F)

Last Spring Hard Freeze May 7
First Fall Hard Freeze October 14
42.23°N, 122.38°W © OpenStreetMap

Growing Season

108 Days June 8 to September 24

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 7a

Avg. annual minimum: 0 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°30°23°
February40°32°24°
March45°35°26°
April51°40°30°
May60°48°36°
June68°54°40°
July79°63°47°
August79°62°46°
September72°56°40°
October58°46°33°
November42°35°28°
December35°29°23°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January6.3
February4.7
March4.7
April4.3
May3.5
June3.0
July0.2
August0.0
September2.4
October4.4
November5.3
December6.4

Sunrise / Sunset

Daylight Longest: 15h 05m · Shortest: 8h 55m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:23 AM4:37 PM9h 14m
February6:50 AM5:10 PM10h 21m
March6:10 AM5:50 PM11h 40m
April5:25 AM6:35 PM13h 09m
May4:48 AM7:12 PM14h 24m
June4:28 AM7:32 PM15h 04m
July4:36 AM7:24 PM14h 48m
August5:09 AM6:51 PM13h 43m
September5:52 AM6:08 PM12h 16m
October6:35 AM5:25 PM10h 49m
November7:13 AM4:47 PM9h 33m
December7:32 AM4:28 PM8h 56m

Nearby Stations

Ashland, ORMay 6 - October 8 Copco #1 Dam, CA May 4 - October 21 Keno, ORJune 5 - September 20 Medford Rogue Vly AP, OR April 8 - October 29 Montague Siskiyou Co AP, CA May 12 - October 8 Ruch, ORMay 4 - October 13

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