Frost dates for Healdton 3 E, OK
At Healdton 3 E, the median last spring frost (32°F) is Apr 6 and the median first fall frost is Nov 1, for a typical growing season of 204 days. For a 90% chance that the last frost has passed, wait until Apr 25. Nearby ZIP codes are in USDA hardiness zone 8a.
- Apr 6Last spring frost (median)50% chance of 32°F after this date
- Apr 25Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 204 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 3 | Apr 20 | May 4 |
| 32°F | Mar 20 | Apr 6 | Apr 25 |
| 28°F | Mar 7 | Mar 28 | Apr 15 |
| 24°F | Feb 23 | Mar 14 | Apr 4 |
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 5 | Oct 21 | Nov 5 |
| 32°F | Oct 15 | Nov 1 | Nov 14 |
| 28°F | Oct 24 | Nov 8 | Nov 26 |
| 24°F | Nov 1 | Nov 18 | Dec 5 |
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 | 163 days | 184 days | 206 days |
| 32°F | 180 days | 204 days | 228 days |
| 28°F | 200 days | 225 days | 251 days |
| 24°F | 222 days | 247 days | 273 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 |
|---|---|---|---|
| 73438 | 8a | 10 to 15°F | 9 km |
| 73463 | 8a | 10 to 15°F | 12 km |
| 73437 | 8a | 10 to 15°F | 15 km |
| 73435 | 8a | 10 to 15°F | 15 km |
| 73458 | 8a | 10 to 15°F | 16 km |
| 73481 | 8a | 10 to 15°F | 24 km |
| 73487 | 8a | 10 to 15°F | 26 km |
| 73444 | 8a | 10 to 15°F | 27 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 USC00344001, at 34.2333, -97.4203, elevation 275 m (902 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 74.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ringling 1n Mesonet (16 km)
- Ardmore 7wnw Mesonet (20 km)
- Ardmore (25 km)
- Ardmore 3ene Mesonet (31 km)
- Burneyville 2se Mesont (40 km)
- Velma 7nw Mesonet (46 km)
- Marietta 5sw (46 km)
- Madill 11wsw Mesonet (49 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.