Frost dates for Phoenix Deer Valley Muni Airport, AZ
At Phoenix Deer Valley Muni Airport, the median last spring frost (32°F) is Jan 8 and the median first fall frost is Dec 25, for a typical growing season of 354 days. For a 90% chance that the last frost has passed, wait until Feb 12. Nearby ZIP codes are in USDA hardiness zones 9b to 10a.
- Jan 8Last spring frost (median)50% chance of 32°F after this date
- Feb 12Safer planting date10% chance of 32°F after this date
- Dec 25First fall frost (median)50% chance of 32°F by this date
- 354 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Jan 1 | Feb 1 | Mar 2 |
| 32°F | Dec 16 | Jan 8 | Feb 12 |
| 28°F | Dec 15 | Jan 8 | Feb 2 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Nov 25 | Dec 11 | Dec 29 |
| 32°F | Dec 5 | Dec 25 | Jan 23 |
| 28°F | Dec 14 | Jan 7 | Feb 1 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 279 days | 314 days | 347 days |
| 32°F | 320 days | 354 days | 365 days |
| 28°F | 359 days | 365 days | 365 days |
| 24°F | 365 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 99% |
| 32°F | 70% |
| 28°F | 17% |
| 24°F | 2% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85027 | 10a | 30 to 35°F | 2 km |
| 85024 | 10a | 30 to 35°F | 3 km |
| 85023 | 9b | 25 to 30°F | 6 km |
| 85085 | 9b | 25 to 30°F | 7 km |
| 85310 | 10a | 30 to 35°F | 7 km |
| 85022 | 9b | 25 to 30°F | 7 km |
| 85050 | 10a | 30 to 35°F | 8 km |
| 85053 | 9b | 25 to 30°F | 8 km |
| 85308 | 9b | 25 to 30°F | 10 km |
| 85029 | 9b | 25 to 30°F | 11 km |
| 85083 | 9b | 25 to 30°F | 11 km |
| 85306 | 9b | 25 to 30°F | 11 km |
| 85020 | 10a | 30 to 35°F | 14 km |
| 85021 | 9b | 25 to 30°F | 14 km |
| 85051 | 9b | 25 to 30°F | 15 km |
| 85086 | 9b | 25 to 30°F | 16 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00003184, at 33.6883, -112.0817, elevation 444 m (1,455 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 3.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Scottsdale Muni Airport (17 km)
- Pinnacle Peak (21 km)
- Carefree (22 km)
- Youngtown (23 km)
- Phoenix Sky Harbor Intl Airport (30 km)
- Tempe Asu (33 km)
- Litchfield Park (33 km)
- South Phoenix (34 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.