Frost dates for Okemah, OK
At Okemah, the median last spring frost (32°F) is Mar 24 and the median first fall frost is Nov 9, for a typical growing season of 229 days. For a 90% chance that the last frost has passed, wait until Apr 10. Nearby ZIP codes are in USDA hardiness zone 7b.
- Mar 24Last spring frost (median)50% chance of 32°F after this date
- Apr 10Safer planting date10% chance of 32°F after this date
- Nov 9First fall frost (median)50% chance of 32°F by this date
- 229 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 | Mar 19 | Apr 5 | Apr 22 |
| 32°F | Mar 5 | Mar 24 | Apr 10 |
| 28°F | Feb 23 | Mar 11 | Mar 29 |
| 24°F | Feb 10 | Mar 1 | Mar 17 |
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 16 | Nov 1 | Nov 14 |
| 32°F | Oct 25 | Nov 9 | Nov 26 |
| 28°F | Nov 2 | Nov 20 | Dec 8 |
| 24°F | Nov 13 | Dec 2 | Dec 22 |
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 | 186 days | 208 days | 229 days |
| 32°F | 204 days | 229 days | 254 days |
| 28°F | 228 days | 254 days | 277 days |
| 24°F | 250 days | 277 days | 304 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 |
|---|---|---|---|
| 74859 | 7b | 5 to 10°F | 4 km |
| 74837 | 7b | 5 to 10°F | 17 km |
| 74829 | 7b | 5 to 10°F | 17 km |
| 74880 | 7b | 5 to 10°F | 17 km |
| 74833 | 7b | 5 to 10°F | 20 km |
| 74839 | 7b | 5 to 10°F | 31 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 USC00346638, at 35.4253, -96.3033, elevation 285 m (935 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 50.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Okmulgee Wtr Wks (33 km)
- Seminole (38 km)
- Holdenville 3ese Mesonet (40 km)
- Holdenville 2sse (42 km)
- Seminole 4ssw Mesonet (45 km)
- Bristow (46 km)
- Chandler 5se Mesonet (52 km)
- Shawnee 3nnw Mesonet (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.