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

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

The frost season in Moncton

Last frost (average): May 13
In 1 year out of 10 it still freezes on May 26.
First frost: October 14
Frost-free season: 155 days
Frost after 15 May: in 33 % of years

Frost days per month in Moncton

January: 29.5 · -12 °C
February: 27 · -11 °C
March: 28.6 · -7 °C
April: 18.9 · -1 °C
May: 2.7 · 4 °C
June: 0.1 · 9 °C
July: 0 · 13 °C
August: 0 · 13 °C
September: 0.1 · 9 °C
October: 5.7 · 4 °C
November: 18.1 · -1 °C
December: 26.9 · -7 °C

Matched to the average lows of a weather station 57 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.