Last Frost Date Greater Sudbury: Frost Dates, Late Frost Risk & Growing Season
When is the last spring frost and the first autumn frost in Greater Sudbury? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.
The frost season in Greater Sudbury
- Last frost (average): May 18
- In 1 year out of 10 it still freezes on May 28.
- First frost: October 3
- Frost-free season: 137 days
- Frost after 15 May: in 70 % of years
Frost days per month in Greater Sudbury
- January: 30.8 · -19 °C
- February: 28.2 · -18 °C
- March: 29.9 · -11 °C
- April: 23 · -3 °C
- May: 5.7 · 4 °C
- June: 0 · 10 °C
- July: 0 · 13 °C
- August: 0 · 13 °C
- September: 0.6 · 9 °C
- October: 11.1 · 2 °C
- November: 24.4 · -4 °C
- December: 30.5 · -12 °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.