Frost dates for Show Low Airport, AZ
At Show Low Airport, the median last spring frost (32°F) is May 5 and the median first fall frost is Oct 15, for a typical growing season of 162 days. For a 90% chance that the last frost has passed, wait until May 20. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- May 5Last spring frost (median)50% chance of 32°F after this date
- May 20Safer planting date10% chance of 32°F after this date
- Oct 15First fall frost (median)50% chance of 32°F by this date
- 162 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 | May 2 | May 17 | Jun 2 |
| 32°F | Apr 21 | May 5 | May 20 |
| 28°F | Apr 7 | Apr 22 | May 7 |
| 24°F | Mar 15 | Apr 6 | Apr 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 | Sep 27 | Oct 7 | Oct 20 |
| 32°F | Oct 2 | Oct 15 | Oct 28 |
| 28°F | Oct 10 | Oct 24 | Nov 8 |
| 24°F | Oct 19 | Nov 4 | Nov 20 |
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 | 122 days | 141 days | 160 days |
| 32°F | 141 days | 162 days | 181 days |
| 28°F | 163 days | 184 days | 204 days |
| 24°F | 187 days | 210 days | 236 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 |
|---|---|---|---|
| 85901 | 7a | 0 to 5°F | 6 km |
| 85902 | 7a | 0 to 5°F | 18 km |
| 85912 | 7a | 0 to 5°F | 19 km |
| 85934 | 6b | -5 to 0°F | 22 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 USC00027855, at 34.2639, -110.0075, elevation 1954 m (6,411 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 121.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Pinetop 2e (17 km)
- Mc Nary 2n (22 km)
- Snowflake (28 km)
- Sunrise Mountain (52 km)
- Heber (black Mesa) Ranger Station (53 km)
- Greer (58 km)
- Petrified Forest National Park (61 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.