Frost Dates for Alameda, CA
In Alameda, CA, the average last spring frost is around Jan 7 and the average first fall frost around Dec 23, for a growing season of about 356 days. For frost-tender plants, wait until Feb 8, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Oakland Metro Intl. Airport, CA weather station, 3 miles away, elevation 6 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Feb 8 | Nov 30 |
| 20% | Jan 30 | Dec 6 |
| 30% | Jan 22 | Dec 10 |
| 40% | Jan 14 | Dec 16 |
| 50% | Jan 7 | Dec 23 |
| 60% | Jan 2 | Dec 29 |
| 70% | Dec 29 | Jan 3 |
| 80% | Dec 24 | Jan 10 |
| 90% | Dec 13 | Jan 24 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Feb 8 | Dec 4 |
| Frost / freeze (32°F) | Jan 7 | Dec 23 |
| Hard freeze (28°F) | Dec 30 | Dec 28 |
Planting calendar for Alameda
Transplant Jan 14 – Jan 28
Transplant Jan 21 – Feb 4
Transplant Jan 21 – Feb 4
Transplant Jan 14 – Jan 28
Sow or transplant Jan 14 – Jan 28
Sow or transplant Jan 14 – Jan 28
Sow or transplant Jan 21 – Feb 4
Sow or transplant Dec 10 – Dec 24
Fall sowing Oct 28 – Nov 25
Fall sowing Oct 28 – Nov 18
Fall sowing Oct 14 – Oct 28
Sow or transplant Dec 10 – Dec 24
Fall sowing Oct 14 – Nov 11
Transplant Dec 24 – Jan 7
Fall sowing Sep 30 – Oct 14
Transplant Dec 17 – Dec 31
Fall sowing Sep 30 – Oct 14
Fall sowing Sep 30 – Oct 14
Fall sowing Nov 11 – Dec 2
Fall sowing Oct 14 – Oct 28
Plant Dec 10 – Dec 24
Based on the average last frost (Jan 7) and first frost (Dec 23). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.