Frost dates for Miami, OK
At Miami, the median last spring frost (32°F) is Apr 6 and the median first fall frost is Oct 27, for a typical growing season of 203 days. For a 90% chance that the last frost has passed, wait until Apr 26. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 6Last spring frost (median)50% chance of 32°F after this date
- Apr 26Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 203 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 2 | Apr 19 | May 5 |
| 32°F | Mar 20 | Apr 6 | Apr 26 |
| 28°F | Mar 3 | Mar 25 | Apr 10 |
| 24°F | Feb 22 | Mar 11 | Mar 31 |
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 3 | Oct 19 | Oct 31 |
| 32°F | Oct 14 | Oct 27 | Nov 10 |
| 28°F | Oct 21 | Nov 5 | Nov 24 |
| 24°F | Oct 28 | Nov 16 | Dec 6 |
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 | 160 days | 181 days | 203 days |
| 32°F | 180 days | 203 days | 227 days |
| 28°F | 202 days | 227 days | 253 days |
| 24°F | 221 days | 250 days | 278 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 |
|---|---|---|---|
| 74354 | 7a | 0 to 5°F | 1 km |
| 74339 | 7a | 0 to 5°F | 6 km |
| 74360 | 7a | 0 to 5°F | 12 km |
| 66778 | 7a | 0 to 5°F | 14 km |
| 74343 | 7a | 0 to 5°F | 17 km |
| 74363 | 7a | 0 to 5°F | 18 km |
| 74333 | 7a | 0 to 5°F | 20 km |
| 74331 | 7a | 0 to 5°F | 27 km |
| 74369 | 7a | 0 to 5°F | 29 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 USC00345855, at 36.8833, -94.8833, elevation 245 m (805 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 89.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Spavinaw (57 km)
- Upper Spavinaw Port (60 km)
- Nowata (71 km)
- Kansas 2 NE (75 km)
- Pryor (75 km)
- Claremore 2 ENE (88 km)
- Bartlesville 3 (101 km)
- Bartlesville F P Field (103 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.