Frost dates for Spavinaw, OK
At Spavinaw, the median last spring frost (32°F) is Apr 7 and the median first fall frost is Nov 2, for a typical growing season of 209 days. For a 90% chance that the last frost has passed, wait until Apr 24. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 7Last spring frost (median)50% chance of 32°F after this date
- Apr 24Safer planting date10% chance of 32°F after this date
- Nov 2First fall frost (median)50% chance of 32°F by this date
- 209 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 | Apr 4 | Apr 18 | May 2 |
| 32°F | Mar 22 | Apr 7 | Apr 24 |
| 28°F | Mar 8 | Mar 29 | Apr 12 |
| 24°F | Feb 26 | Mar 16 | Apr 4 |
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 10 | Oct 25 | Nov 6 |
| 32°F | Oct 19 | Nov 2 | Nov 17 |
| 28°F | Oct 27 | Nov 10 | Nov 29 |
| 24°F | Nov 4 | Nov 21 | Dec 7 |
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 | 168 days | 188 days | 209 days |
| 32°F | 187 days | 209 days | 229 days |
| 28°F | 206 days | 228 days | 251 days |
| 24°F | 222 days | 248 days | 276 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 |
|---|---|---|---|
| 74366 | 7a | 0 to 5°F | 3 km |
| 74367 | 7a | 0 to 5°F | 6 km |
| 74350 | 7a | 0 to 5°F | 9 km |
| 74340 | 7a | 0 to 5°F | 10 km |
| 74342 | 7a | 0 to 5°F | 11 km |
| 74365 | 7a | 0 to 5°F | 11 km |
| 74349 | 7a | 0 to 5°F | 14 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 USC00348380, at 36.3894, -95.0597, elevation 209 m (685 ft).
- Data quality: Representative (10+ years), 25 years of freeze data.
- Average days per year at or below 32°F: 69.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Upper Spavinaw Port (22 km)
- Pryor (26 km)
- Kansas 2 NE (32 km)
- Claremore 2 ENE (47 km)
- Tahlequah (51 km)
- Wagoner (55 km)
- Miami (57 km)
- Nowata (62 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.