Lower Connecticut River Valley Planning Region, Connecticut · Frost dates
Lower Connecticut River Valley Planning Region frost dates.
First-frost, last-frost, and growing-season length for Lower Connecticut River Valley Planning Region, Connecticut. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-09
- 20%
- 05-05
- 50%
- 04-26
- 80%
- 04-17
- 90%
- 04-11
First fall frost
- 10%
- 10-04
- 20%
- 10-08
- 50%
- 10-16
- 80%
- 10-28
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-28
- 20%
- 04-21
- 50%
- 04-10
- 80%
- 04-02
- 90%
- 03-30
First fall freeze
- 10%
- 10-14
- 20%
- 10-19
- 50%
- 10-30
- 80%
- 11-08
- 90%
- 11-12
Growing season length (days, 28°F threshold)
- Short year
- 169
- Median
- 203
- Long year
- 227
Source NOAA station
MERIDEN MARKHAM MUNI AP, CT US
18.4 mi · 30 yrs of record (1991–2020) · 103 ft elev.
Data from MERIDEN MARKHAM MUNI AP, CT US, 18.4 miles away with 30-year NOAA record (1991-2020).
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