Frost dates for Greenwood 2ne, DE
At Greenwood 2ne, the median last spring frost (32°F) is Apr 11 and the median first fall frost is Oct 30, for a typical growing season of 200 days. For a 90% chance that the last frost has passed, wait until Apr 28. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 11Last spring frost (median)50% chance of 32°F after this date
- Apr 28Safer planting date10% chance of 32°F after this date
- Oct 30First fall frost (median)50% chance of 32°F by this date
- 200 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 11 | Apr 26 | May 13 |
| 32°F | Mar 29 | Apr 11 | Apr 28 |
| 28°F | Mar 15 | Mar 30 | Apr 11 |
| 24°F | Mar 2 | Mar 17 | 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 5 | Oct 19 | Nov 1 |
| 32°F | Oct 14 | Oct 30 | Nov 13 |
| 28°F | Oct 26 | Nov 11 | Nov 29 |
| 24°F | Nov 6 | Nov 25 | Dec 13 |
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 | 154 days | 175 days | 195 days |
| 32°F | 177 days | 200 days | 222 days |
| 28°F | 206 days | 227 days | 250 days |
| 24°F | 229 days | 253 days | 277 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 |
|---|---|---|---|
| 19950 | 7b | 5 to 10°F | 2 km |
| 19933 | 7b | 5 to 10°F | 10 km |
| 19954 | 7b | 5 to 10°F | 10 km |
| 19952 | 7b | 5 to 10°F | 12 km |
| 19960 | 7b | 5 to 10°F | 15 km |
| 21632 | 7b | 5 to 10°F | 19 km |
| 19973 | 7b | 5 to 10°F | 21 km |
| 21629 | 7b | 5 to 10°F | 22 km |
| 19963 | 7b | 5 to 10°F | 23 km |
| 21639 | 7b | 5 to 10°F | 24 km |
| 21660 | 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 USC00073595, at 38.8161, -75.5761, elevation 14 m (45 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 96.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Georgetown Sussex Co Airport (24 km)
- Lewes (36 km)
- Dover (37 km)
- Wilmington New Castle Co Airport (95 km)
- Newark Ag Farm (96 km)
- Wilmington Porter Rsch (107 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.