Mifflin County, Pennsylvania · Frost dates
Mifflin County frost dates.
First-frost, last-frost, and growing-season length for Mifflin County, Pennsylvania. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-09
- 20%
- 05-01
- 50%
- 04-21
- 80%
- 04-11
- 90%
- 04-06
First fall frost
- 10%
- 10-07
- 20%
- 10-13
- 50%
- 10-24
- 80%
- 11-02
- 90%
- 11-07
28°F — killing freeze
Last spring freeze
- 10%
- 04-21
- 20%
- 04-16
- 50%
- 04-06
- 80%
- 03-30
- 90%
- 03-24
First fall freeze
- 10%
- 10-21
- 20%
- 10-27
- 50%
- 11-05
- 80%
- 11-14
- 90%
- 11-19
Growing season length (days, 28°F threshold)
- Short year
- 183
- Median
- 213
- Long year
- 240
Source NOAA station
LEWISTOWN, PA US
4.5 mi · 30 yrs of record (1991–2020) · 460 ft elev.
Data from LEWISTOWN, PA US, 4.5 miles away with 30-year NOAA record (1991-2020).
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