Frost dates for Clinton, OK
At Clinton, the median last spring frost (32°F) is Apr 13 and the median first fall frost is Oct 28, for a typical growing season of 197 days. For a 90% chance that the last frost has passed, wait until Apr 27. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 13Last spring frost (median)50% chance of 32°F after this date
- Apr 27Safer planting date10% chance of 32°F after this date
- Oct 28First fall frost (median)50% chance of 32°F by this date
- 197 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 9 | Apr 22 | May 5 |
| 32°F | Mar 31 | Apr 13 | Apr 27 |
| 28°F | Mar 11 | Apr 1 | Apr 18 |
| 24°F | Feb 26 | Mar 17 | Apr 5 |
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 6 | Oct 20 | Oct 30 |
| 32°F | Oct 14 | Oct 28 | Nov 9 |
| 28°F | Oct 20 | Nov 5 | Nov 19 |
| 24°F | Oct 27 | Nov 14 | Nov 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 | 161 days | 179 days | 197 days |
| 32°F | 177 days | 197 days | 217 days |
| 28°F | 195 days | 219 days | 244 days |
| 24°F | 217 days | 241 days | 266 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 |
|---|---|---|---|
| 73601 | 7b | 5 to 10°F | 3 km |
| 73620 | 7b | 5 to 10°F | 14 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 USC00341909, at 35.5014, -98.9772, elevation 478 m (1,570 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 87.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bessie 4wnw Mesonet (13 km)
- Weatherford 4wsw Mesnt (18 km)
- Weatherford (25 km)
- Butler 5sw Mesonet (28 km)
- Clinton Sherman Airport (35 km)
- Hammon 3 SSW (39 km)
- Putnam 3n Mesonet (44 km)
- Hinton 7w Mesonet (45 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.