Last Frost Date Saint-Jean-sur-Richelieu: Frost Dates, Late Frost Risk & Growing Season
When is the last spring frost and the first autumn frost in Saint-Jean-sur-Richelieu? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.
The frost season in Saint-Jean-sur-Richelieu
- Last frost (average): April 29
- In 1 year out of 10 it still freezes on May 8.
- First frost: October 22
- Frost-free season: 176 days
- Frost after 15 May: in 0 % of years
Frost days per month in Saint-Jean-sur-Richelieu
- January: 28.8 · -13 °C
- February: 26.3 · -12 °C
- March: 24.7 · -6 °C
- April: 11.4 · 1 °C
- May: 0.5 · 8 °C
- June: 0 · 14 °C
- July: 0 · 17 °C
- August: 0 · 16 °C
- September: 0 · 12 °C
- October: 4.3 · 5 °C
- November: 18.8 · -1 °C
- December: 26.8 · -8 °C
- Matched to the average lows of a weather station 40 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.