South Central Connecticut Planning Region, Connecticut · Frost dates
South Central Connecticut Planning Region frost dates.
First-frost, last-frost, and growing-season length for South Central Connecticut Planning Region, Connecticut. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-01
- 20%
- 04-26
- 50%
- 04-17
- 80%
- 04-08
- 90%
- 04-02
First fall frost
- 10%
- 10-11
- 20%
- 10-16
- 50%
- 10-27
- 80%
- 11-04
- 90%
- 11-08
28°F — killing freeze
Last spring freeze
- 10%
- 04-18
- 20%
- 04-13
- 50%
- 04-04
- 80%
- 03-28
- 90%
- 03-22
First fall freeze
- 10%
- 10-22
- 20%
- 10-28
- 50%
- 11-06
- 80%
- 11-16
- 90%
- 11-21
Growing season length (days, 28°F threshold)
- Short year
- 187
- Median
- 216
- Long year
- 244
Source NOAA station
NEW HAVEN TWEED AP, CT US
3.2 mi · 30 yrs of record (1991–2020) · 3 ft elev.
Data from NEW HAVEN TWEED AP, CT US, 3.2 miles away with 30-year NOAA record (1991-2020).
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