State frost hub
First and last frost dates in Oklahoma
Below are the average last spring frost and first fall frost for supported cities in Oklahoma, each tied to its representative frost station and USDA zone. These are planning estimates from NOAA climate normals; verify locally before planting high-value crops.
| City | ZIP | Last frost | First frost | Frost-free days | Station | Zone |
|---|---|---|---|---|---|---|
| Oklahoma City | 73102 | Apr 5 | Oct 30 | 208 | oklahoma-city-will-rogers | 7b |
| Tulsa | 74103 | Apr 5 | Oct 30 | 208 | tulsa-intl | 7b |