Frost Dates for Mount Vernon, NY
In Mount Vernon, NY, the average last spring frost is around Apr 1 and the average first fall frost around Nov 16, for a growing season of about 230 days. For frost-tender plants, wait until Apr 12, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Bronx, NY weather station, 5 miles away, elevation 39 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% | Apr 12 | Nov 2 |
| 20% | Apr 8 | Nov 6 |
| 30% | Apr 5 | Nov 9 |
| 40% | Apr 3 | Nov 12 |
| 50% | Apr 1 | Nov 16 |
| 60% | Mar 31 | Nov 20 |
| 70% | Mar 28 | Nov 24 |
| 80% | Mar 25 | Nov 30 |
| 90% | Mar 19 | Dec 4 |
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) | Apr 11 | Nov 4 |
| Frost / freeze (32°F) | Apr 1 | Nov 16 |
| Hard freeze (28°F) | Mar 23 | Nov 30 |
Planting calendar for Mount Vernon
Transplant Apr 8 – Apr 22
Transplant Apr 15 – Apr 29
Transplant Apr 15 – Apr 29
Transplant Apr 8 – Apr 22
Sow or transplant Apr 8 – Apr 22
Sow or transplant Apr 8 – Apr 22
Sow or transplant Apr 15 – Apr 29
Sow or transplant Mar 4 – Mar 18
Fall sowing Sep 21 – Oct 19
Fall sowing Sep 21 – Oct 12
Fall sowing Sep 7 – Sep 21
Sow or transplant Mar 4 – Mar 18
Fall sowing Sep 7 – Oct 5
Transplant Mar 18 – Apr 1
Fall sowing Aug 24 – Sep 7
Transplant Mar 11 – Mar 25
Fall sowing Aug 24 – Sep 7
Fall sowing Aug 24 – Sep 7
Fall sowing Oct 5 – Oct 26
Fall sowing Sep 7 – Sep 21
Plant Mar 4 – Mar 18
Based on the average last frost (Apr 1) and first frost (Nov 16). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.