GreenlySan Francisco: frost dates
United States
San Francisco had no frost in 2016–2025, so crops are planted by warmth and rain rather than by frost dates.
| Last spring frost | none in ten years |
|---|---|
| First autumn frost | none in ten years |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
There is no frost season here: crops are planted by warmth and rain rather than by frost dates.
San Francisco: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Planted in autumn
| Crop | Plant around |
|---|---|
| Crocus | 1 October |
| Daffodil | 1 October |
| Garlic | 1 October |
| Hyacinth | 1 October |
| Lily | 1 October |
| Tulip | 1 October |
A month before the first autumn frost, so the roots grow before winter.