Frost Dates for Naugatuck, CT
In Naugatuck, CT, the average last spring frost is around Apr 18 and the average first fall frost around Oct 26, for a growing season of about 191 days. For frost-tender plants, wait until May 3, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Mt Carmel, CT weather station, 10 miles away, elevation 180 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% | May 3 | Oct 11 |
| 20% | Apr 28 | Oct 16 |
| 30% | Apr 23 | Oct 20 |
| 40% | Apr 20 | Oct 23 |
| 50% | Apr 18 | Oct 26 |
| 60% | Apr 15 | Oct 29 |
| 70% | Apr 12 | Nov 1 |
| 80% | Apr 9 | Nov 4 |
| 90% | Apr 5 | Nov 9 |
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) | May 1 | Oct 15 |
| Frost / freeze (32°F) | Apr 18 | Oct 26 |
| Hard freeze (28°F) | Apr 5 | Nov 6 |
Planting calendar for Naugatuck
Transplant Apr 25 – May 9
Transplant May 2 – May 16
Transplant May 2 – May 16
Transplant Apr 25 – May 9
Sow or transplant Apr 25 – May 9
Sow or transplant Apr 25 – May 9
Sow or transplant May 2 – May 16
Sow or transplant Mar 21 – Apr 4
Fall sowing Aug 31 – Sep 28
Fall sowing Aug 31 – Sep 21
Fall sowing Aug 17 – Aug 31
Sow or transplant Mar 21 – Apr 4
Fall sowing Aug 17 – Sep 14
Transplant Apr 4 – Apr 18
Fall sowing Aug 3 – Aug 17
Transplant Mar 28 – Apr 11
Fall sowing Aug 3 – Aug 17
Fall sowing Aug 3 – Aug 17
Fall sowing Sep 14 – Oct 5
Fall sowing Aug 17 – Aug 31
Plant Mar 21 – Apr 4
Based on the average last frost (Apr 18) and first frost (Oct 26). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.