Frost dates for Eloy 4 NE, AZ
At Eloy 4 NE, the median last spring frost (32°F) is Feb 24 and the median first fall frost is Nov 28, for a typical growing season of 273 days. For a 90% chance that the last frost has passed, wait until Mar 18. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 24Last spring frost (median)50% chance of 32°F after this date
- Mar 18Safer planting date10% chance of 32°F after this date
- Nov 28First fall frost (median)50% chance of 32°F by this date
- 273 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 | Feb 25 | Mar 17 | Apr 11 |
| 32°F | Jan 30 | Feb 24 | Mar 18 |
| 28°F | Jan 5 | Feb 3 | Feb 28 |
| 24°F | Dec 19 | Jan 20 | Feb 15 |
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 30 | Nov 17 | Dec 1 |
| 32°F | Nov 11 | Nov 28 | Dec 13 |
| 28°F | Nov 23 | Dec 8 | Jan 1 |
| 24°F | Dec 1 | Dec 26 | Jan 29 |
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 | 207 days | 240 days | 268 days |
| 32°F | 239 days | 273 days | 303 days |
| 28°F | 277 days | 308 days | 344 days |
| 24°F | 308 days | 342 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 99% |
| 24°F | 77% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85131 | 9a | 20 to 25°F | 15 km |
| 85194 | 9a | 20 to 25°F | 17 km |
| 85123 | 9a | 20 to 25°F | 17 km |
| 85141 | 9a | 20 to 25°F | 17 km |
| 85128 | 9a | 20 to 25°F | 20 km |
| 85191 | 9a | 20 to 25°F | 24 km |
| 85122 | 9a | 20 to 25°F | 26 km |
| 85145 | 9a | 20 to 25°F | 29 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 USC00022807, at 32.7819, -111.5186, elevation 471 m (1,545 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 32.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Robson Rch (11 km)
- Arizona City (17 km)
- Picacho 8 SE (19 km)
- Casa Grande (22 km)
- Casa Grande National Monument (24 km)
- Florence (31 km)
- Chandler Heights (50 km)
- Maricopa 4 N (60 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.