ZIP 06608 Zone 7a

Connecticut · USDA zone 7a, average annual extreme minimum 0°F to 5°F.

Nearest qualified station: BRIDGEPORT SIKORSKY MEM AP, CT US (USW00094702), 3.3 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 5. Median first 32°F is November 6. The 50% growing-season length is 216 days. The green band runs from the median last frost to the median first frost. Thin ticks mark the 10%, 50%, and 90% dates.

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.

ProbabilityDateHow to read it
90%March 25Earlier date. A last 32°F on or after this day is common.
50%April 5Median.
10%April 17Later 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.

ProbabilityDateHow to read it
10%October 25Earlier date. A first 32°F on or before this day is uncommon.
50%November 6Median.
90%November 20Later 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 longDays
10%234
50%216
90%198

28°F threshold

10%50%90%
Last, on or afterApril 6March 26March 11
First, on or beforeNovember 6November 19December 5
Season at least259 days238 days221 days

36°F threshold

10%50%90%
Last, on or afterApril 29April 16April 6
First, on or beforeOctober 11October 26November 8
Season at least210 days194 days175 days

Station BRIDGEPORT SIKORSKY MEM AP, CT US (USW00094702). Completeness flag S, 30 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 1.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Connecticut cities