Frost dates for Ardmore 7wnw Mesonet, OK
At Ardmore 7wnw Mesonet, the median last spring frost (32°F) is Mar 21 and the median first fall frost is Nov 8, for a typical growing season of 231 days. For a 90% chance that the last frost has passed, wait until Apr 10. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 21Last spring frost (median)50% chance of 32°F after this date
- Apr 10Safer planting date10% chance of 32°F after this date
- Nov 8First fall frost (median)50% chance of 32°F by this date
- 231 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 | Mar 18 | Apr 5 | Apr 25 |
| 32°F | Mar 3 | Mar 21 | Apr 10 |
| 28°F | Feb 17 | Mar 7 | Mar 27 |
| 24°F | Jan 30 | Feb 26 | Mar 14 |
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 18 | Nov 1 | Nov 16 |
| 32°F | Oct 24 | Nov 8 | Nov 28 |
| 28°F | Nov 1 | Nov 19 | Dec 7 |
| 24°F | Nov 9 | Dec 1 | Dec 21 |
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 | 185 days | 208 days | 230 days |
| 32°F | 205 days | 231 days | 259 days |
| 28°F | 228 days | 255 days | 284 days |
| 24°F | 252 days | 282 days | 313 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 |
|---|---|---|---|
| 73443 | 8a | 10 to 15°F | 12 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 USC00340312, at 34.2281, -97.2014, elevation 283 m (928 ft).
- Data quality: Representative (10+ years), 12 years of freeze data.
- Average days per year at or below 32°F: 56.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ardmore (7 km)
- Ardmore 3ene Mesonet (11 km)
- Healdton 3 E (20 km)
- Madill 11wsw Mesonet (32 km)
- Ringling 1n Mesonet (36 km)
- Chickasaw Nra (37 km)
- Burneyville 2se Mesont (38 km)
- Marietta 5sw (39 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.