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

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

The frost season in Granby

Last frost (average): May 8
In 1 year out of 10 it still freezes on May 20.
First frost: October 8
Frost-free season: 152 days
Frost after 15 May: in 17 % of years

Frost days per month in Granby

January: 30.3 · -16 °C
February: 27.8 · -15 °C
March: 28.7 · -9 °C
April: 18.6 · -1 °C
May: 2.3 · 6 °C
June: 0 · 12 °C
July: 0 · 15 °C
August: 0 · 14 °C
September: 0.3 · 9 °C
October: 8.3 · 3 °C
November: 22.4 · -3 °C
December: 29.6 · -11 °C

No weather station nearby: plain grid values, which are often a little too cold – dates may therefore be late.
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.