Frost dates for Chandler Heights, AZ
At Chandler Heights, the median last spring frost (32°F) is Feb 1 and the median first fall frost is Dec 11, for a typical growing season of 315 days. For a 90% chance that the last frost has passed, wait until Feb 27. Nearby ZIP codes are in USDA hardiness zones 9a to 9b.
- Feb 1Last spring frost (median)50% chance of 32°F after this date
- Feb 27Safer planting date10% chance of 32°F after this date
- Dec 11First fall frost (median)50% chance of 32°F by this date
- 315 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 29 | Feb 21 | Mar 11 |
| 32°F | Jan 2 | Feb 1 | Feb 27 |
| 28°F | Dec 15 | Jan 8 | Feb 11 |
| 24°F | Dec 13 | Jan 2 | Jan 29 |
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 12 | Nov 28 | Dec 14 |
| 32°F | Nov 23 | Dec 11 | Jan 1 |
| 28°F | Dec 4 | Dec 26 | Jan 29 |
| 24°F | Dec 13 | Jan 1 | Jan 24 |
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 | 248 days | 280 days | 311 days |
| 32°F | 281 days | 315 days | 347 days |
| 28°F | 322 days | 357 days | 365 days |
| 24°F | 363 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 99% |
| 28°F | 70% |
| 24°F | 12% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85142 | 9b | 25 to 30°F | 2 km |
| 85298 | 9b | 25 to 30°F | 6 km |
| 85297 | 9b | 25 to 30°F | 10 km |
| 85249 | 9b | 25 to 30°F | 11 km |
| 85295 | 9b | 25 to 30°F | 12 km |
| 85147 | 9a | 20 to 25°F | 13 km |
| 85286 | 9b | 25 to 30°F | 16 km |
| 85143 | 9b | 25 to 30°F | 16 km |
| 85248 | 9b | 25 to 30°F | 17 km |
| 85140 | 9b | 25 to 30°F | 19 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 USC00021514, at 33.2058, -111.6819, elevation 434 m (1,425 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 10.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- E Mesa (24 km)
- Casa Grande National Monument (27 km)
- Tempe Asu (33 km)
- Florence (33 km)
- Maricopa 4 N (34 km)
- Apache Junction 5 NE (34 km)
- Casa Grande (36 km)
- Phoenix Sky Harbor Intl Airport (39 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.