Morris County, New Jersey · Frost dates
Morris County frost dates.
First-frost, last-frost, and growing-season length for Morris County, New Jersey. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 05-05
- 20%
- 04-30
- 50%
- 04-17
- 80%
- 04-08
- 90%
- 04-04
First fall frost
- 10%
- 10-08
- 20%
- 10-13
- 50%
- 10-23
- 80%
- 11-01
- 90%
- 11-06
28°F — killing freeze
Last spring freeze
- 10%
- 04-18
- 20%
- 04-13
- 50%
- 04-04
- 80%
- 03-28
- 90%
- 03-21
First fall freeze
- 10%
- 10-19
- 20%
- 10-24
- 50%
- 11-02
- 80%
- 11-12
- 90%
- 11-17
Growing season length (days, 28°F threshold)
- Short year
- 184
- Median
- 212
- Long year
- 241
Source NOAA station
BOONTON 1 SE, NJ US
8.2 mi · 30 yrs of record (1991–2020) · 280 ft elev.
Data from BOONTON 1 SE, NJ US, 8.2 miles away with 30-year NOAA record (1991-2020).
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