Frost dates for Benson 6se, AZ
At Benson 6se, the median last spring frost (32°F) is Apr 12 and the median first fall frost is Nov 1, for a typical growing season of 202 days. For a 90% chance that the last frost has passed, wait until Apr 29. Nearby ZIP codes are in USDA hardiness zone 8b.
- Apr 12Last spring frost (median)50% chance of 32°F after this date
- Apr 29Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 202 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 12 | Apr 26 | May 10 |
| 32°F | Mar 26 | Apr 12 | Apr 29 |
| 28°F | Mar 2 | Mar 23 | Apr 13 |
| 24°F | Feb 6 | Mar 2 | Mar 23 |
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 18 | Nov 1 | Nov 15 |
| 28°F | Oct 27 | Nov 11 | Nov 26 |
| 24°F | Nov 6 | Nov 21 | Dec 7 |
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 | 162 days | 180 days | 198 days |
| 32°F | 181 days | 202 days | 224 days |
| 28°F | 204 days | 232 days | 259 days |
| 24°F | 235 days | 262 days | 290 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 |
|---|---|---|---|
| 85630 | 8b | 15 to 20°F | 6 km |
| 85627 | 8b | 15 to 20°F | 14 km |
| 85609 | 8b | 15 to 20°F | 25 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 USC00020683, at 31.8806, -110.2403, elevation 1125 m (3,690 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 93.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Kartchner Caverns (12 km)
- Tombstone (25 km)
- Fort Huachuca Pioneer Airfield (35 km)
- Sierra Vista (38 km)
- Pearce - Sunsites (38 km)
- Elgin 5 S (41 km)
- Cascabel (44 km)
- Canelo 1 NW (45 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.