Frost dates in Sierra Madre, CA
The average last spring frost in Sierra Madre is around May 14 and the first fall frost is around November 9. That gives Sierra Madre an average growing season of about 179 days.
Last spring frost
| Early (10% chance after) | April 20 |
|---|---|
| Average (50%) | May 14 |
| Late (90%) | June 6 |
First fall frost
| Early (10%) | October 15 |
|---|---|
| Average (50%) | November 9 |
| Late (90% chance before) | November 29 |