ZIP 06053 Zone 6b

Connecticut · USDA zone 6b, average annual extreme minimum -5°F to 0°F.

Nearest qualified station: HARTFORD BRAINARD FLD, CT US (USW00014752), 8 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 17. Median first 32°F is October 26. The 50% growing-season length is 191 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%April 1Earlier date. A last 32°F on or after this day is common.
50%April 17Median.
10%May 1Later 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 12Earlier date. A first 32°F on or before this day is uncommon.
50%October 26Median.
90%November 7Later 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%212
50%191
90%169

28°F threshold

10%50%90%
Last, on or afterApril 21April 3March 21
First, on or beforeOctober 22November 5November 20
Season at least237 days216 days193 days

36°F threshold

10%50%90%
Last, on or afterMay 14April 30April 17
First, on or beforeOctober 2October 14October 29
Season at least186 days167 days148 days

Station HARTFORD BRAINARD FLD, CT US (USW00014752). Completeness flag S, 28 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 5.8 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