Frost dates in Tulsa, Oklahoma
NOAA 1991–2020 normals for a 32 °F freeze. Low spots and the edge of town run colder than downtown.
Short answer
The average last spring frost in Tulsa is March 31, and the average first fall frost is November 4, from NOAA's Tulsa Intl Airport station, 5 miles from the middle of Tulsa. 1 year in 10 the last frost comes after April 15, and the first one by October 20. That leaves about 218 frost-free days. Tulsa is in USDA planting zone 7b.
Weather stations around Tulsa
The first row is the date most people in Tulsa go by. The others show how far the dates move across the area.
| Station | Last spring frost | First fall frost | Frost-free |
|---|---|---|---|
| Tulsa Intl Airport 5 mi away, 650 ft | March 31 1 in 10 after April 15 | November 4 1 in 10 by October 20 | 218 days |
| Tulsa R L Jones Jr Airport 8 mi away, 638 ft | March 30 1 in 10 after April 17 | November 4 1 in 10 by October 21 | 219 days |
| Bixby 10 mi away, 605 ft | April 1 1 in 10 after April 20 | November 1 1 in 10 by October 16 | 214 days |
| Claremore 2 ENE 22 mi away, 588 ft | April 7 1 in 10 after April 24 | October 30 1 in 10 by October 15 | 206 days |
| Mannford 6 NW 30 mi away, 830 ft | April 6 1 in 10 after April 23 | October 29 1 in 10 by October 14 | 206 days |
Distances are from the middle of Tulsa as the Census Bureau maps it. The average date is NOAA's 50% date: half of years have a later last frost, or an earlier first one. Plan by the 1-in-10 date if a freeze would cost you plants. The planting zone is the USDA 2023 zone for ZIP code 74112, at the middle of the city.
Your exact ZIP code
Tulsa covers a lot of ground. For the station nearest your own street, and its planting zone, type your ZIP code.
How these dates work
Frost dates come from NOAA's 1991 to 2020 Climate Normals, which work out from each weather station's daily lows how likely the last spring freeze and the first fall freeze (32 °F) are by each date. We use the station nearest the middle of your ZIP code and show its height and distance, since a station on a hill or by a lake can differ from your yard.
The average date is the 50% date: half of years have a freeze after the spring date or before the fall one. The 1-in-10 dates are NOAA's 10% dates, the ones to plan by if a late freeze would cost you plants. Within one yard, cold air pools in low spots while walls and paving hold heat, so some corners freeze before others.
More frost dates
All of Oklahoma, station by station.
Other Oklahoma cities: Oklahoma City
Nearby: Wichita, KS · Springfield, MO · Olathe, KS
Where the numbers come from
- USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture
- PRISM Climate Group, Oregon State University (zone data)
- NOAA NCEI, U.S. Climate Normals 1991–2020, annual/seasonal
- NOAA, Normals calculation methodology (frost-freeze probability dates)
- US Census Bureau, 2025 ZCTA gazetteer (ZIP code centers)
- US Census Bureau, 2025 city population estimates and place gazetteer