Frost dates for Oklahoma City Post Airport, OK
At Oklahoma City Post Airport, the median last spring frost (32°F) is Apr 2 and the median first fall frost is Nov 4, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 2Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 4First fall frost (median)50% chance of 32°F by this date
- 216 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 30 | Apr 13 | Apr 29 |
| 32°F | Mar 14 | Apr 2 | Apr 18 |
| 28°F | Feb 28 | Mar 19 | Apr 5 |
| 24°F | Feb 19 | 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 14 | Oct 27 | Nov 9 |
| 32°F | Oct 21 | Nov 4 | Nov 18 |
| 28°F | Oct 31 | Nov 13 | Nov 30 |
| 24°F | Nov 5 | Nov 24 | Dec 10 |
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 | 178 days | 196 days | 216 days |
| 32°F | 194 days | 216 days | 239 days |
| 28°F | 213 days | 237 days | 262 days |
| 24°F | 230 days | 259 days | 285 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 |
|---|---|---|---|
| 73132 | 7b | 5 to 10°F | 1 km |
| 73008 | 7b | 5 to 10°F | 3 km |
| 73122 | 7b | 5 to 10°F | 3 km |
| 73162 | 7b | 5 to 10°F | 5 km |
| 73127 | 7b | 5 to 10°F | 6 km |
| 73112 | 7b | 5 to 10°F | 7 km |
| 73116 | 7b | 5 to 10°F | 8 km |
| 73142 | 7b | 5 to 10°F | 8 km |
| 73120 | 7b | 5 to 10°F | 8 km |
| 73107 | 7b | 5 to 10°F | 9 km |
| 73118 | 7b | 5 to 10°F | 11 km |
| 73099 | 7b | 5 to 10°F | 11 km |
| 73134 | 7b | 5 to 10°F | 11 km |
| 73106 | 7b | 5 to 10°F | 12 km |
| 73103 | 7b | 5 to 10°F | 13 km |
| 73114 | 7b | 5 to 10°F | 13 km |
| 73105 | 7b | 5 to 10°F | 13 km |
| 73013 | 7b | 5 to 10°F | 16 km |
| 73012 | 7b | 5 to 10°F | 16 km |
| 73078 | 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 USW00003954, at 35.5342, -97.6469, elevation 395 m (1,297 ft).
- Data quality: Representative (10+ years), 24 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
- Oklahoma City Will Rogers Airport (17 km)
- Spencer 2ene Mesonet (28 km)
- El Reno 1 N (28 km)
- El Reno 5 WNW Mesonet (35 km)
- Norman 2nw Mesonet (37 km)
- Guthrie 4wsw Mesonet (38 km)
- Guthrie 5s (39 km)
- Minco 2ssw Mesonet (40 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.