Last Frost Date Santa Rosa: Frost Dates, Late Frost Risk & Growing Season
When is the last spring frost and the first autumn frost in Santa Rosa? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.
The frost season in Santa Rosa
- Last frost (average): February 28
- In 1 year out of 10 it still freezes on April 6.
- First frost: December 6
- Frost-free season: 280 days
- Frost after 15 May: in 0 % of years
Frost days per month in Santa Rosa
- January: 3.4 · 4 °C
- February: 2.1 · 4 °C
- March: 0.7 · 5 °C
- April: 0.3 · 6 °C
- May: 0 · 9 °C
- June: 0 · 12 °C
- July: 0 · 14 °C
- August: 0 · 14 °C
- September: 0 · 14 °C
- October: 0 · 11 °C
- November: 0.8 · 6 °C
- December: 3.8 · 4 °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.