Frost dates for Williamston 1 E, NC
At Williamston 1 E, the median last spring frost (32°F) is Mar 20 and the median first fall frost is Nov 12, for a typical growing season of 239 days. For a 90% chance that the last frost has passed, wait until Apr 5. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 20Last spring frost (median)50% chance of 32°F after this date
- Apr 5Safer planting date10% chance of 32°F after this date
- Nov 12First fall frost (median)50% chance of 32°F by this date
- 239 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 17 | Apr 2 | Apr 17 |
| 32°F | Mar 1 | Mar 20 | Apr 5 |
| 28°F | Feb 7 | Mar 5 | Mar 25 |
| 24°F | Jan 19 | Feb 16 | Mar 11 |
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 21 | Nov 1 | Nov 16 |
| 32°F | Oct 31 | Nov 12 | Dec 4 |
| 28°F | Nov 7 | Nov 26 | Dec 25 |
| 24°F | Nov 24 | Dec 19 | Jan 18 |
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 | 195 days | 214 days | 236 days |
| 32°F | 215 days | 239 days | 268 days |
| 28°F | 238 days | 268 days | 302 days |
| 24°F | 271 days | 304 days | 337 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 27892 | 8a | 10 to 15°F | 5 km |
| 27825 | 8a | 10 to 15°F | 13 km |
| 27983 | 8a | 10 to 15°F | 15 km |
| 27846 | 8a | 10 to 15°F | 16 km |
| 27840 | 8a | 10 to 15°F | 21 km |
| 27871 | 8a | 10 to 15°F | 21 km |
| 27841 | 8a | 10 to 15°F | 23 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 USC00319440, at 35.8528, -77.0306, elevation 6 m (20 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 53.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Plymouth 5 E (34 km)
- Lewiston (34 km)
- Washington Wastewater Plant 4w (34 km)
- Greenville (41 km)
- Tarboro 1 S (46 km)
- Edenton (47 km)
- Belhaven 3 NE (51 km)
- Aurora 6 N (57 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.
All North Carolina stations · How frost dates are calculated