ZIP 06510 Zone 7a
Connecticut · USDA zone 7a, average annual extreme minimum 0°F to 5°F.
Nearest qualified station: NEW HAVEN TWEED AP, CT US (USW00014758), 3.6 miles from the Census ZCTA internal point for this ZIP.
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
Last 32°F in spring
NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.
| Probability | Date | How to read it |
|---|---|---|
| 90% | April 2 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 17 | Median. |
| 10% | May 1 | Later date. A last 32°F on or after this day is uncommon. |
First 32°F in fall
NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.
| Probability | Date | How to read it |
|---|---|---|
| 10% | October 11 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | October 27 | Median. |
| 90% | November 8 | Later date. A first 32°F on or before this day is common. |
32°F growing-season length
Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.
| Probability the season is at least this long | Days |
|---|---|
| 10% | 211 |
| 50% | 193 |
| 90% | 174 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 18 | April 4 | March 22 |
| First, on or before | October 22 | November 6 | November 21 |
| Season at least | 236 days | 215 days | 195 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 12 | April 30 | April 17 |
| First, on or before | October 4 | October 15 | November 1 |
| Season at least | 189 days | 170 days | 152 days |
Station NEW HAVEN TWEED AP, CT US (USW00014758). Completeness flag R, 19 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 0.9 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.