Frost Dates for Dewey-Humboldt, AZ

Based on data from Prescott weather station, 11 miles away

Elevation: 4583 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. April 30
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. October 20

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 May 6
First Fall Frost October 15

Hard Freeze (28°F)

Last Spring Hard Freeze April 13
First Fall Hard Freeze October 31
34.53°N, 112.24°W © OpenStreetMap

Growing Season

173 Days April 30 to October 20

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 7b

Avg. annual minimum: 5 to 10°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Csa Hot-Summer Mediterranean

Hot, dry summers and mild, wet winters. Classic Mediterranean climate ideal for grapes, olives, tomatoes, and herbs. Summer irrigation is usually necessary.

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
January53°38°24°
February55°41°26°
March61°46°32°
April68°53°37°
May76°61°45°
June87°70°54°
July90°75°61°
August87°74°60°
September82°67°52°
October73°57°40°
November62°46°30°
December52°38°24°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.1
February4.3
March4.6
April2.5
May0.0
June0.6
July3.5
August3.9
September3.7
October4.2
November3.8
December4.3

Sunrise / Sunset

Daylight Mountain Standard Time (MST) Longest: 14h 19m · Shortest: 9h 41m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Standard Time (MST))
Month Sunrise Sunset Daylight
January7:41 AM5:37 PM9h 56m
February7:22 AM6:07 PM10h 45m
March6:47 AM6:32 PM11h 44m
April6:04 AM6:56 PM12h 52m
May5:32 AM7:20 PM13h 48m
June5:21 AM7:39 PM14h 18m
July5:32 AM7:38 PM14h 06m
August5:55 AM7:13 PM13h 18m
September6:18 AM6:30 PM12h 12m
October6:42 AM5:48 PM11h 06m
November7:10 AM5:19 PM10h 09m
December7:35 AM5:16 PM9h 42m

Nearby Stations

Prescott Love Fld, AZ April 20 - October 27 Chino Valley, AZ April 27 - October 24 Jerome, AZMarch 26 - November 25 Cordes, AZApril 5 - November 17 Tuzigoot, AZ March 30 - November 10 Walnut Creek, AZ May 24 - October 7

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