Northumberland County, Pennsylvania · Frost dates
Northumberland County frost dates.
First-frost, last-frost, and growing-season length for Northumberland County, Pennsylvania. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-19
- 20%
- 05-12
- 50%
- 04-30
- 80%
- 04-19
- 90%
- 04-15
First fall frost
- 10%
- 09-30
- 20%
- 10-03
- 50%
- 10-13
- 80%
- 10-24
- 90%
- 10-31
28°F — killing freeze
Last spring freeze
- 10%
- 05-04
- 20%
- 04-26
- 50%
- 04-14
- 80%
- 04-05
- 90%
- 03-31
First fall freeze
- 10%
- 10-10
- 20%
- 10-15
- 50%
- 10-26
- 80%
- 11-05
- 90%
- 11-10
Growing season length (days, 28°F threshold)
- Short year
- 159
- Median
- 195
- Long year
- 224
Source NOAA station
SUNBURY, PA US
4.1 mi · 30 yrs of record (1991–2020) · 575 ft elev.
Data from SUNBURY, PA US, 4.1 miles away with 30-year NOAA record (1991-2020).
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