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Delaware frost dates by weather station
Delaware has 7 NOAA weather stations with 1991–2020 freeze statistics. Median last spring frost dates run from Mar 29 at Lewes to Apr 11 at Greenwood 2ne.
- 7Stations
- Mar 29Earliest last frostLewes
- Apr 11Latest last frostGreenwood 2ne
- 231 daysLongest growing seasonLewes
| Station | Last spring frost | First fall frost | Growing season | Elevation |
|---|---|---|---|---|
| Dover | Apr 4 | Nov 4 | 214 days | 30 ft |
| Georgetown Sussex Co Airport | Apr 4 | Nov 6 | 217 days | 51 ft |
| Greenwood 2ne | Apr 11 | Oct 30 | 200 days | 45 ft |
| Lewes | Mar 29 | Nov 14 | 231 days | 10 ft |
| Newark Ag Farm | Apr 7 | Nov 2 | 208 days | 106 ft |
| Wilmington New Castle Co Airport | Apr 7 | Nov 1 | 209 days | 79 ft |
| Wilmington Porter Rsch | Apr 7 | Nov 4 | 209 days | 270 ft |
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.
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.