Frost dates for Frederick, OK
At Frederick, the median last spring frost (32°F) is Apr 3 and the median first fall frost is Nov 4, for a typical growing season of 213 days. For a 90% chance that the last frost has passed, wait until Apr 22. Nearby ZIP codes are in USDA hardiness zone 8a.
- Apr 3Last spring frost (median)50% chance of 32°F after this date
- Apr 22Safer planting date10% chance of 32°F after this date
- Nov 4First fall frost (median)50% chance of 32°F by this date
- 213 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 29 | Apr 15 | Apr 30 |
| 32°F | Mar 13 | Apr 3 | Apr 22 |
| 28°F | Feb 28 | Mar 21 | Apr 10 |
| 24°F | Feb 17 | Mar 8 | Mar 27 |
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 13 | Oct 27 | Nov 8 |
| 32°F | Oct 20 | Nov 4 | Nov 17 |
| 28°F | Oct 28 | Nov 12 | Dec 1 |
| 24°F | Nov 4 | Nov 23 | Dec 12 |
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 | 175 days | 195 days | 218 days |
| 32°F | 188 days | 213 days | 237 days |
| 28°F | 209 days | 235 days | 262 days |
| 24°F | 232 days | 260 days | 288 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 |
|---|---|---|---|
| 73555 | 8a | 10 to 15°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 USC00343353, at 34.3861, -99.0200, elevation 392 m (1,285 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 73.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Altus AFB (5 km)
- Tipton 4s Mesonet (12 km)
- Grandfield 3w Mesonet (30 km)
- Chattanooga (34 km)
- Altus Irig Rsch Station (37 km)
- Altus 3s Mesonet (37 km)
- Wichita Mountain Wr (48 km)
- Medicine Pk 3w Mesonet (56 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.