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Last Frost usually January 31 or before First
Frost usually November 30-December 31 |
Columns show Low Temperature Ranges
| USDA | Fahrenheit | Celsius | USDA | Fahrenheit | Celsius | Sunset Magazine Zone 17 This wonderful climate is the reason that millions of people live in San Francisco, Oakland and Sausalito. The winters are nearly frostless, the summer cool and mild and moisture is nearly always present in the way of fog. |
| 1 | Below -50 | Below -45.6 | 6b | -5 0 | -17.8 -20.5 | |
| 2a | -50 -45 | -42.8 -45.5 | 7a | 0 5 | -15.0 -17.7 | |
| 2b | -45 -40 | -40.0 -42.7 | 7b | 5 10 | -12.3 -14.9 | |
| 3a | -40 -35 | -37.3 -39.9 | 8a | 10 15 | -9.5 -12.2 | |
| 3b | -35 -30 | -34.5 -37.2 | 8b | 15 20 | -6.7 -9.4 | |
| 4a | -30 -25 | -31.7 -34.4 | 9a | 20 25 | -3.9 -6.6 | |
| 4b | -25 -20 | -28.9 -31.6 | 9b | 25 30 | -1.2 -3.8 | |
| 5a | -20 -15 | -26.2 -28.8 | 10a | 30 35 | 1.6 -1.1 | |
| 5b | -15 -10 | -23.4 -26.1 | 10b | 35 40 | 4.4 1.7 | |
| 6a | -10 -5 | -20.6 -23.3 | 11 | above 40 | above 4.5 |
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Return Home Mountain States Wholesale Nursery webmaster george@mswn.com January 05, 2009 |