Frost dates for Tulsa Intl Airport, OK
At Tulsa Intl Airport, the median last spring frost (32°F) is Mar 31 and the median first fall frost is Nov 4, for a typical growing season of 220 days. For a 90% chance that the last frost has passed, wait until Apr 15. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Mar 31Last spring frost (median)50% chance of 32°F after this date
- Apr 15Safer planting date10% chance of 32°F after this date
- Nov 4First fall frost (median)50% chance of 32°F by this date
- 220 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 7b (5 to 10°F) · see all zone 7b frost dates
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 26 | Apr 10 | Apr 27 |
| 32°F | Mar 11 | Mar 31 | Apr 15 |
| 28°F | Feb 28 | Mar 17 | Apr 5 |
| 24°F | Feb 17 | Mar 5 | Mar 23 |
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 11 | Oct 26 | Nov 6 |
| 32°F | Oct 20 | Nov 4 | Nov 19 |
| 28°F | Oct 31 | Nov 13 | Dec 1 |
| 24°F | Nov 6 | Nov 25 | 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 | 176 days | 198 days | 221 days |
| 32°F | 198 days | 220 days | 243 days |
| 28°F | 217 days | 242 days | 268 days |
| 24°F | 241 days | 265 days | 290 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 |
|---|---|---|---|
| 74115 | 7b | 5 to 10°F | 2 km |
| 74116 | 7b | 5 to 10°F | 4 km |
| 74117 | 7b | 5 to 10°F | 5 km |
| 74112 | 7b | 5 to 10°F | 6 km |
| 74110 | 7b | 5 to 10°F | 6 km |
| 74128 | 7b | 5 to 10°F | 7 km |
| 74130 | 7b | 5 to 10°F | 8 km |
| 74129 | 7b | 5 to 10°F | 8 km |
| 74104 | 7b | 5 to 10°F | 8 km |
| 74106 | 7b | 5 to 10°F | 9 km |
| 74114 | 7b | 5 to 10°F | 10 km |
| 74120 | 7b | 5 to 10°F | 10 km |
| 74055 | 7b | 5 to 10°F | 11 km |
| 74103 | 7b | 5 to 10°F | 11 km |
| 74108 | 7b | 5 to 10°F | 11 km |
| 74119 | 7b | 5 to 10°F | 11 km |
| 74146 | 7b | 5 to 10°F | 11 km |
| 74126 | 7b | 5 to 10°F | 12 km |
| 74134 | 7b | 5 to 10°F | 13 km |
| 74127 | 7b | 5 to 10°F | 15 km |
| 74015 | 7b | 5 to 10°F | 15 km |
| 74073 | 7b | 5 to 10°F | 16 km |
| 74021 | 7a | 0 to 5°F | 20 km |
| 74082 | 7a | 0 to 5°F | 28 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 USW00013968, at 36.1994, -95.8872, elevation 198 m (650 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 72.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tulsa R L Jones Jr Airport (20 km)
- Bixby (24 km)
- Claremore 2 ENE (31 km)
- Barnsdall (48 km)
- Mannford 6 NW (50 km)
- Pryor (51 km)
- Wagoner (53 km)
- Nowata (59 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.