Frost Dates for Vail, AZ

Based on data from Saguaro Np weather station, 9 miles away

Elevation: 3235 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 26
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 16

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 6
First Fall Frost December 8

Hard Freeze (28°F)

Last Spring Hard Freeze January 7
First Fall Hard Freeze December 28
32.05°N, 110.71°W © OpenStreetMap

Growing Season

325 Days January 26 to December 16

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 9a

Avg. annual minimum: 20 to 25°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
BSh Hot Semi-Arid (Steppe)

Hot with low but not negligible rainfall. Less extreme than true desert. Dryland farming techniques and drought-tolerant varieties work well. Mulching and water conservation are key.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January65°53°41°
February68°56°43°
March74°61°48°
April82°68°54°
May91°77°62°
June101°86°72°
July100°87°74°
August98°85°73°
September94°81°69°
October86°72°59°
November75°62°49°
December65°53°41°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.8
February3.4
March4.1
April0.0
May0.0
June0.7
July2.9
August3.8
September3.7
October0.0
November0.0
December2.8

Sunrise / Sunset

Daylight Mountain Standard Time (MST) Longest: 14h 07m · Shortest: 9h 53m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Standard Time (MST))
Month Sunrise Sunset Daylight
January7:29 AM5:36 PM10h 07m
February7:12 AM6:03 PM10h 52m
March6:40 AM6:25 PM11h 46m
April5:59 AM6:47 PM12h 48m
May5:30 AM7:09 PM13h 39m
June5:20 AM7:26 PM14h 06m
July5:31 AM7:26 PM13h 55m
August5:52 AM7:03 PM13h 11m
September6:12 AM6:23 PM12h 11m
October6:33 AM5:44 PM11h 11m
November6:59 AM5:18 PM10h 19m
December7:22 AM5:16 PM9h 54m

Nearby Stations

Tucson Wfo, AZ January 20 - December 17 Tucson Intl AP, AZ February 5 - December 9 Tucson Camp Ave Exp, AZ February 20 - November 27 Mt Lemmon Willow Canyon, AZ April 1 - November 19 Tucson U Of A #1, AZ February 11 - December 2 Tohono Chul, AZ February 26 - December 4

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