Frost Dates for Bridgeport, CT
In Bridgeport, CT, the average last spring frost is around Apr 5 and the average first fall frost around Nov 6, for a growing season of about 216 days. For frost-tender plants, wait until Apr 17, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Bridgeport Sikorsky Mem Airport, CT weather station, 4 miles away, elevation 5 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 17 | Oct 25 |
| 20% | Apr 13 | Oct 30 |
| 30% | Apr 9 | Nov 1 |
| 40% | Apr 7 | Nov 4 |
| 50% | Apr 5 | Nov 6 |
| 60% | Apr 3 | Nov 9 |
| 70% | Apr 1 | Nov 12 |
| 80% | Mar 30 | Nov 16 |
| 90% | Mar 25 | Nov 20 |
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 16 | Oct 26 |
| Frost / freeze (32°F) | Apr 5 | Nov 6 |
| Hard freeze (28°F) | Mar 26 | Nov 19 |
Planting calendar for Bridgeport
Transplant Apr 12 – Apr 26
Transplant Apr 19 – May 3
Transplant Apr 19 – May 3
Transplant Apr 12 – Apr 26
Sow or transplant Apr 12 – Apr 26
Sow or transplant Apr 12 – Apr 26
Sow or transplant Apr 19 – May 3
Sow or transplant Mar 8 – Mar 22
Fall sowing Sep 11 – Oct 9
Fall sowing Sep 11 – Oct 2
Fall sowing Aug 28 – Sep 11
Sow or transplant Mar 8 – Mar 22
Fall sowing Aug 28 – Sep 25
Transplant Mar 22 – Apr 5
Fall sowing Aug 14 – Aug 28
Transplant Mar 15 – Mar 29
Fall sowing Aug 14 – Aug 28
Fall sowing Aug 14 – Aug 28
Fall sowing Sep 25 – Oct 16
Fall sowing Aug 28 – Sep 11
Plant Mar 8 – Mar 22
Based on the average last frost (Apr 5) and first frost (Nov 6). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.