Frost dates for Sunrise Mountain, AZ
At Sunrise Mountain, the median last spring frost (32°F) is Jun 18 and the median first fall frost is Sep 18, for a typical growing season of 91 days. For a 90% chance that the last frost has passed, wait until Jun 30. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Jun 18Last spring frost (median)50% chance of 32°F after this date
- Jun 30Safer planting date10% chance of 32°F after this date
- Sep 18First fall frost (median)50% chance of 32°F by this date
- 91 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 |
|---|---|---|---|
| 32°F | Jun 4 | Jun 18 | Jun 30 |
| 28°F | May 17 | Jun 6 | Jun 23 |
| 24°F | Apr 30 | May 18 | Jun 11 |
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 |
|---|---|---|---|
| 32°F | Sep 4 | Sep 18 | Sep 30 |
| 28°F | Sep 16 | Sep 29 | Oct 10 |
| 24°F | Sep 26 | Oct 7 | Oct 22 |
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 | 41 days | 64 days | 83 days |
| 32°F | 72 days | 91 days | 109 days |
| 28°F | 95 days | 114 days | 135 days |
| 24°F | 116 days | 141 days | 165 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85927 | 6a | -10 to -5°F | 8 km |
| 85925 | 6a | -10 to -5°F | 20 km |
| 85930 | 6b | -5 to 0°F | 20 km |
| 85938 | 6b | -5 to 0°F | 25 km |
| 85940 | 6b | -5 to 0°F | 34 km |
| 85932 | 6b | -5 to 0°F | 35 km |
| 85920 | 6b | -5 to 0°F | 38 km |
| 85935 | 6b | -5 to 0°F | 39 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 USC00028326, at 33.9733, -109.5631, elevation 2856 m (9,370 ft).
- Data quality: Estimated from nearby stations (2+ years), 9 years of freeze data.
- Average days per year at or below 32°F: 228.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Greer (12 km)
- Mc Nary 2n (31 km)
- Springerville (32 km)
- Pinetop 2e (37 km)
- Alpine (41 km)
- Show Low Airport (52 km)
- Black River Pumps (58 km)
- Saint Johns (62 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.