Worcester County, Massachusetts · Frost dates
Worcester County frost dates.
First-frost, last-frost, and growing-season length for Worcester County, Massachusetts. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-05
- 20%
- 05-02
- 50%
- 04-23
- 80%
- 04-15
- 90%
- 04-11
First fall frost
- 10%
- 10-06
- 20%
- 10-10
- 50%
- 10-21
- 80%
- 10-30
- 90%
- 11-03
28°F — killing freeze
Last spring freeze
- 10%
- 04-22
- 20%
- 04-18
- 50%
- 04-11
- 80%
- 04-03
- 90%
- 04-01
First fall freeze
- 10%
- 10-17
- 20%
- 10-23
- 50%
- 11-01
- 80%
- 11-11
- 90%
- 11-15
Growing season length (days, 28°F threshold)
- Short year
- 178
- Median
- 204
- Long year
- 228
Source NOAA station
WORCESTER RGNL AP, MA US
4.5 mi · 30 yrs of record (1991–2020) · 1000 ft elev.
Data from WORCESTER RGNL AP, MA US, 4.5 miles away with 30-year NOAA record (1991-2020).
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