Frost dates / By state
Frost dates in Oklahoma
NOAA 1991–2020 normals for a 32 °F freeze. Your own yard can run a little either side.
Short answer
Across 20 NOAA weather stations in Oklahoma, the average last spring frost runs from March 26 at Altus AFB to April 22 at Goodwell 2 E. The first fall frost comes as early as October 20 at Gage Airport and as late as November 10 at Altus AFB. Planting zones near these stations run from 6b to 8a.
Oklahoma cities
- Frost dates in Oklahoma City: last frost April 4, first frost November 2
- Frost dates in Tulsa: last frost March 31, first frost November 4
Find yours by ZIP code
The table below is by weather station. For the station nearest you, and your planting zone, type your ZIP code.
Oklahoma frost dates by weather station
| Station | Last spring frost | First fall frost | Frost-free | Zone nearby |
|---|---|---|---|---|
| Altus AFB 1,267 ft | March 26 1 in 10 after April 14 | November 10 1 in 10 by October 26 | 229 days | 8a |
| Bartlesville F P Fld 715 ft | April 12 1 in 10 after April 28 | October 21 1 in 10 by October 5 | 192 days | 7a |
| Clinton Sherman Airport 1,922 ft | April 5 1 in 10 after April 22 | November 4 1 in 10 by October 21 | 213 days | 7b |
| Gage Airport 2,191 ft | April 17 1 in 10 after May 2 | October 20 1 in 10 by October 6 | 186 days | 7a |
| Goodwell 2 E 3,266 ft | April 22 1 in 10 after May 5 | October 22 1 in 10 by October 9 | 183 days | – |
| Goodwell 2 SE 3,282 ft | April 18 1 in 10 after May 3 | October 24 1 in 10 by October 11 | 189 days | – |
| Guthrie Muni Airport 1,068 ft | April 3 1 in 10 after April 20 | November 1 1 in 10 by October 19 | 212 days | 7b |
| Guymon Muni Airport 3,123 ft | April 18 1 in 10 after May 1 | October 23 1 in 10 by October 11 | 188 days | 6b |
| Hobart Muni Airport 1,556 ft | April 4 1 in 10 after April 21 | November 4 1 in 10 by October 22 | 214 days | 7b |
| Lawton Muni Airport 1,069 ft | April 1 1 in 10 after April 19 | November 5 1 in 10 by October 22 | 218 days | 7b |
| Mcalester Rgnl Airport 770 ft | March 31 1 in 10 after April 18 | November 3 1 in 10 by October 20 | 217 days | 7b |
| Muskogee Davis Fld 610 ft | April 2 1 in 10 after April 20 | November 2 1 in 10 by October 20 | 214 days | 7b |
| Oklahoma City Post Airport 1,297 ft | April 2 1 in 10 after April 18 | November 4 1 in 10 by October 21 | 216 days | 7b |
| Oklahoma City Will Rogers Airport 1,285 ft | April 4 1 in 10 after April 20 | November 2 1 in 10 by October 21 | 212 days | 7b |
| Ponca City Muni Airport 1,000 ft | April 10 1 in 10 after April 27 | October 27 1 in 10 by October 14 | 200 days | 7a |
| Stillwater 2 W 890 ft | April 5 1 in 10 after April 21 | October 30 1 in 10 by October 16 | 208 days | 7a |
| Stillwater 5 WNW 888 ft | April 12 1 in 10 after April 27 | October 27 1 in 10 by October 12 | 198 days | 7a |
| Stillwater Rgnl Airport 984 ft | April 3 1 in 10 after April 21 | October 31 1 in 10 by October 15 | 211 days | 7a |
| Tulsa Intl Airport 650 ft | March 31 1 in 10 after April 15 | November 4 1 in 10 by October 20 | 218 days | 7b |
| Tulsa R L Jones Jr Airport 638 ft | March 30 1 in 10 after April 17 | November 4 1 in 10 by October 21 | 219 days | 7b |
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. Stations are NOAA's main weather stations, mostly airports. “Zone nearby” is the USDA 2023 zone of the nearest ZIP code within 10 miles. NOAA counts the frost season from August to July, so in the warmest places the “first fall” freeze lands after New Year.
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.
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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)