Union County, Pennsylvania · Frost dates
Union County frost dates.
First-frost, last-frost, and growing-season length for Union County, Pennsylvania. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-11
- 20%
- 05-05
- 50%
- 04-25
- 80%
- 04-17
- 90%
- 04-12
First fall frost
- 10%
- 10-04
- 20%
- 10-08
- 50%
- 10-19
- 80%
- 10-30
- 90%
- 11-02
28°F — killing freeze
Last spring freeze
- 10%
- 04-28
- 20%
- 04-21
- 50%
- 04-12
- 80%
- 04-03
- 90%
- 03-31
First fall freeze
- 10%
- 10-16
- 20%
- 10-22
- 50%
- 11-02
- 80%
- 11-10
- 90%
- 11-16
Growing season length (days, 28°F threshold)
- Short year
- 171
- Median
- 204
- Long year
- 230
Source NOAA station
LAURELTON CTR, PA US
9.3 mi · 30 yrs of record (1991–2020) · 800 ft elev.
Data from LAURELTON CTR, PA US, 9.3 miles away with 30-year NOAA record (1991-2020).
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