Frost Dates for Tucson, AZ

Based on data from Tucson Wfo weather station, 2 miles away

Elevation: 2490 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 20
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 17

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 2
First Fall Frost December 9

Hard Freeze (28°F)

Last Spring Hard Freeze January 4
First Fall Hard Freeze December 30
32.22°N, 110.93°W © OpenStreetMap

Growing Season

332 Days January 20 to December 17

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.
BWh Hot Desert

Very hot and extremely dry with minimal rainfall. Irrigation is essential for any gardening. Heat-tolerant crops and desert-adapted plants thrive; shade structures help in peak summer.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January66°54°42°
February69°57°45°
March76°63°50°
April83°69°56°
May91°78°64°
June101°87°73°
July100°88°77°
August98°87°76°
September95°83°72°
October86°73°60°
November75°62°50°
December65°53°42°

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
January7:30 AM5:36 PM10h 06m
February7:13 AM6:04 PM10h 51m
March6:41 AM6:26 PM11h 46m
April6:00 AM6:48 PM12h 48m
May5:31 AM7:10 PM13h 39m
June5:21 AM7:27 PM14h 06m
July5:32 AM7:27 PM13h 55m
August5:52 AM7:04 PM13h 11m
September6:13 AM6:24 PM12h 11m
October6:33 AM5:44 PM11h 11m
November6:60 AM5:18 PM10h 19m
December7:23 AM5:17 PM9h 54m

Nearby Stations

Tucson U Of A #1, AZ February 11 - December 2 Tucson Camp Ave Exp, AZ February 20 - November 27 Tucson Intl AP, AZ February 5 - December 9 Tohono Chul, AZ February 26 - December 4 Tucson 11 W, AZ February 8 - December 10 Catalina Sp, AZ April 2 - November 11

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