Delaware County, Pennsylvania · Frost dates
Delaware County frost dates.
First-frost, last-frost, and growing-season length for Delaware County, Pennsylvania. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 04-09
- 20%
- 04-05
- 50%
- 03-30
- 80%
- 03-21
- 90%
- 03-16
First fall frost
- 10%
- 11-02
- 20%
- 11-06
- 50%
- 11-16
- 80%
- 11-27
- 90%
- 12-02
28°F — killing freeze
Last spring freeze
- 10%
- 03-31
- 20%
- 03-28
- 50%
- 03-20
- 80%
- 03-10
- 90%
- 03-04
First fall freeze
- 10%
- 11-11
- 20%
- 11-16
- 50%
- 11-28
- 80%
- 12-09
- 90%
- 12-15
Growing season length (days, 28°F threshold)
- Short year
- 225
- Median
- 253
- Long year
- 286
Source NOAA station
MARCUS HOOK, PA US
6.5 mi · 30 yrs of record (1991–2020) · 10 ft elev.
Data from MARCUS HOOK, PA US, 6.5 miles away with 30-year NOAA record (1991-2020).
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