Frost dates for Marietta 5sw, OK
At Marietta 5sw, the median last spring frost (32°F) is Apr 6 and the median first fall frost is Nov 2, for a typical growing season of 211 days. For a 90% chance that the last frost has passed, wait until Apr 24. Nearby ZIP codes are in USDA hardiness zone 8a.
- Apr 6Last 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
- 211 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 31 | Apr 17 | May 1 |
| 32°F | Mar 16 | Apr 6 | Apr 24 |
| 28°F | Mar 3 | Mar 23 | Apr 11 |
| 24°F | Feb 21 | 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 8 | Oct 23 | Nov 5 |
| 32°F | Oct 18 | Nov 2 | Nov 16 |
| 28°F | Oct 24 | Nov 9 | Nov 27 |
| 24°F | Nov 2 | Nov 21 | Dec 9 |
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 | 190 days | 210 days |
| 32°F | 186 days | 211 days | 234 days |
| 28°F | 206 days | 232 days | 256 days |
| 24°F | 226 days | 254 days | 282 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 |
|---|---|---|---|
| 73448 | 8a | 10 to 15°F | 10 km |
| 73459 | 8a | 10 to 15°F | 12 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 USC00345563, at 33.8761, -97.1642, elevation 244 m (802 ft).
- Data quality: Representative (10+ years), 24 years of freeze data.
- Average days per year at or below 32°F: 70.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Burneyville 2se Mesont (10 km)
- Madill 11wsw Mesonet (27 km)
- Ardmore (33 km)
- Ardmore 3ene Mesonet (36 km)
- Ardmore 7wnw Mesonet (39 km)
- Madill (43 km)
- Healdton 3 E (46 km)
- Ringling 1n Mesonet (53 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.