Frost dates for Pearce - Sunsites, AZ
At Pearce - Sunsites, the median last spring frost (32°F) is Apr 14 and the median first fall frost is Nov 2, for a typical growing season of 200 days. For a 90% chance that the last frost has passed, wait until Apr 30. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Apr 14Last spring frost (median)50% chance of 32°F after this date
- Apr 30Safer planting date10% chance of 32°F after this date
- Nov 2First fall frost (median)50% chance of 32°F by this date
- 200 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 | Apr 13 | Apr 28 | May 10 |
| 32°F | Mar 28 | Apr 14 | Apr 30 |
| 28°F | Mar 4 | Mar 27 | Apr 16 |
| 24°F | Feb 7 | Mar 4 | Mar 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 | Oct 12 | Oct 24 | Nov 5 |
| 32°F | Oct 20 | Nov 2 | Nov 16 |
| 28°F | Oct 30 | Nov 13 | Nov 29 |
| 24°F | Nov 9 | Nov 26 | Dec 13 |
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 | 160 days | 178 days | 198 days |
| 32°F | 178 days | 200 days | 222 days |
| 28°F | 202 days | 228 days | 254 days |
| 24°F | 235 days | 267 days | 298 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85606 | 8b | 15 to 20°F | 12 km |
| 85625 | 8a | 10 to 15°F | 18 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 USC00026353, at 31.9356, -109.8378, elevation 1326 m (4,350 ft).
- Data quality: Representative (10+ years), 26 years of freeze data.
- Average days per year at or below 32°F: 82.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tombstone (33 km)
- Willcox (36 km)
- Benson 6se (38 km)
- Mc Neal (40 km)
- Chiricahua National Monument (46 km)
- Kartchner Caverns (50 km)
- Bowie (54 km)
- Bisbee 1wnw (55 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.