Frost Dates for Dublin, CA
In Dublin, CA, the average last spring frost is around Feb 15 and the average first fall frost around Dec 2, for a growing season of about 292 days. For frost-tender plants, wait until Mar 13, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Livermore, CA weather station, 5 miles away, elevation 393 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% | Mar 13 | Nov 16 |
| 20% | Mar 5 | Nov 22 |
| 30% | Feb 28 | Nov 25 |
| 40% | Feb 22 | Nov 29 |
| 50% | Feb 15 | Dec 2 |
| 60% | Feb 9 | Dec 5 |
| 70% | Feb 1 | Dec 9 |
| 80% | Jan 26 | Dec 14 |
| 90% | Jan 12 | Dec 28 |
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) | Mar 25 | Nov 18 |
| Frost / freeze (32°F) | Feb 15 | Dec 2 |
| Hard freeze (28°F) | Jan 10 | Dec 18 |
Planting calendar for Dublin
Transplant Feb 22 – Mar 8
Transplant Mar 1 – Mar 15
Transplant Mar 1 – Mar 15
Transplant Feb 22 – Mar 8
Sow or transplant Feb 22 – Mar 8
Sow or transplant Feb 22 – Mar 8
Sow or transplant Mar 1 – Mar 15
Sow or transplant Jan 18 – Feb 1
Fall sowing Oct 7 – Nov 4
Fall sowing Oct 7 – Oct 28
Fall sowing Sep 23 – Oct 7
Sow or transplant Jan 18 – Feb 1
Fall sowing Sep 23 – Oct 21
Transplant Feb 1 – Feb 15
Fall sowing Sep 9 – Sep 23
Transplant Jan 25 – Feb 8
Fall sowing Sep 9 – Sep 23
Fall sowing Sep 9 – Sep 23
Fall sowing Oct 21 – Nov 11
Fall sowing Sep 23 – Oct 7
Plant Jan 18 – Feb 1
Based on the average last frost (Feb 15) and first frost (Dec 2). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.