Chester County, Pennsylvania · Frost dates
Chester County frost dates.
First-frost, last-frost, and growing-season length for Chester County, Pennsylvania. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-04
- 20%
- 04-29
- 50%
- 04-19
- 80%
- 04-09
- 90%
- 04-03
First fall frost
- 10%
- 10-11
- 20%
- 10-15
- 50%
- 10-25
- 80%
- 11-03
- 90%
- 11-07
28°F — killing freeze
Last spring freeze
- 10%
- 04-18
- 20%
- 04-12
- 50%
- 04-03
- 80%
- 03-26
- 90%
- 03-19
First fall freeze
- 10%
- 10-24
- 20%
- 10-29
- 50%
- 11-06
- 80%
- 11-15
- 90%
- 11-21
Growing season length (days, 28°F threshold)
- Short year
- 189
- Median
- 217
- Long year
- 247
Source NOAA station
COATESVILLE 2 W, PA US
5.9 mi · 30 yrs of record (1991–2020) · 640 ft elev.
Data from COATESVILLE 2 W, PA US, 5.9 miles away with 30-year NOAA record (1991-2020).
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