Frost dates for Purcell 2 SW, OK
At Purcell 2 SW, the median last spring frost (32°F) is Apr 4 and the median first fall frost is Nov 2, for a typical growing season of 210 days. For a 90% chance that the last frost has passed, wait until Apr 24. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 4Last spring frost (median)50% chance of 32°F after this date
- Apr 24Safer planting date10% chance of 32°F after this date
- Nov 2First fall frost (median)50% chance of 32°F by this date
- 210 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 31 | Apr 17 | May 4 |
| 32°F | Mar 18 | Apr 4 | Apr 24 |
| 28°F | Mar 3 | Mar 23 | Apr 10 |
| 24°F | Feb 21 | Mar 10 | Mar 30 |
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 8 | Oct 24 | Nov 6 |
| 32°F | Oct 18 | Nov 2 | Nov 18 |
| 28°F | Oct 25 | Nov 11 | Nov 27 |
| 24°F | Nov 1 | Nov 21 | Dec 8 |
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 | 168 days | 189 days | 211 days |
| 32°F | 187 days | 210 days | 234 days |
| 28°F | 207 days | 231 days | 255 days |
| 24°F | 224 days | 254 days | 280 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 |
|---|---|---|---|
| 73080 | 7b | 5 to 10°F | 7 km |
| 73095 | 7b | 5 to 10°F | 13 km |
| 73051 | 7b | 5 to 10°F | 14 km |
| 73057 | 7b | 5 to 10°F | 18 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 USC00347327, at 34.9858, -97.3842, elevation 341 m (1,120 ft).
- Data quality: Representative (10+ years), 11 years of freeze data.
- Average days per year at or below 32°F: 80.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Washington 6ssw Mesonet (12 km)
- Norman 3sse (22 km)
- Norman 2nw Mesonet (29 km)
- Lindsay 2 W (29 km)
- Blanchard 2 SSW (30 km)
- Pauls Valley 4 WSW (30 km)
- Pauls Valley 1ssw Mesonet (33 km)
- Byars 3ese Mesonet (38 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.