Last Frost Date Wilmington: Frost Dates, Late Frost Risk & Growing Season

When is the last spring frost and the first autumn frost in Wilmington? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.

The frost season in Wilmington

Last frost (average): April 5
In 1 year out of 10 it still freezes on April 13.
First frost: November 3
Frost-free season: 212 days
Frost after 15 May: in 0 % of years

Frost days per month in Wilmington

January: 24.1 · -4 °C
February: 21.5 · -3 °C
March: 14.1 · 1 °C
April: 1.5 · 6 °C
May: 0 · 12 °C
June: 0 · 17 °C
July: 0 · 20 °C
August: 0 · 19 °C
September: 0 · 15 °C
October: 0.4 · 9 °C
November: 8.2 · 3 °C
December: 19.9 · -1 °C

Matched to the average lows of a weather station 9 km away – accurate to about ±1–2 weeks.
Daily minimum temperatures 2 m above ground over 30 years (1991–2020), NASA POWER; station data: Deutscher Wetterdienst (CC BY 4.0). Ground frost can form while the air at 2 m is still +2 to +3 °C.