Jefferson County, Pennsylvania · Frost dates
Jefferson County frost dates.
First-frost, last-frost, and growing-season length for Jefferson County, Pennsylvania. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-23
- 20%
- 05-17
- 50%
- 05-06
- 80%
- 04-24
- 90%
- 04-19
First fall frost
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-14
- 80%
- 10-25
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 05-13
- 20%
- 05-07
- 50%
- 04-24
- 80%
- 04-14
- 90%
- 04-08
First fall freeze
- 10%
- 10-11
- 20%
- 10-17
- 50%
- 10-28
- 80%
- 11-07
- 90%
- 11-11
Growing season length (days, 28°F threshold)
- Short year
- 151
- Median
- 187
- Long year
- 217
Source NOAA station
DUBOIS JEFFERSON CO AP, PA US
6.5 mi · 30 yrs of record (1991–2020) · 1814 ft elev.
Data from DUBOIS JEFFERSON CO AP, PA US, 6.5 miles away with 30-year NOAA record (1991-2020).
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