Mercer County, Pennsylvania · Frost dates
Mercer County frost dates.
First-frost, last-frost, and growing-season length for Mercer County, Pennsylvania. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 06-01
- 20%
- 05-27
- 50%
- 05-15
- 80%
- 05-04
- 90%
- 04-30
First fall frost
- 10%
- 09-19
- 20%
- 09-24
- 50%
- 10-03
- 80%
- 10-12
- 90%
- 10-19
28°F — killing freeze
Last spring freeze
- 10%
- 05-21
- 20%
- 05-15
- 50%
- 05-03
- 80%
- 04-24
- 90%
- 04-19
First fall freeze
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-13
- 80%
- 10-26
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 131
- Median
- 163
- Long year
- 196
Source NOAA station
MERCER, PA US
5.3 mi · 30 yrs of record (1991–2020) · 1220 ft elev.
Data from MERCER, PA US, 5.3 miles away with 30-year NOAA record (1991-2020).
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