Baltimore County, Maryland · Frost dates
Baltimore County frost dates.
First-frost, last-frost, and growing-season length for Baltimore County, Maryland. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 04-13
- 20%
- 04-09
- 50%
- 04-02
- 80%
- 03-26
- 90%
- 03-20
First fall frost
- 10%
- 10-27
- 20%
- 10-31
- 50%
- 11-07
- 80%
- 11-16
- 90%
- 11-21
28°F — killing freeze
Last spring freeze
- 10%
- 04-03
- 20%
- 03-31
- 50%
- 03-22
- 80%
- 03-13
- 90%
- 03-08
First fall freeze
- 10%
- 11-06
- 20%
- 11-10
- 50%
- 11-20
- 80%
- 12-02
- 90%
- 12-07
Growing season length (days, 28°F threshold)
- Short year
- 217
- Median
- 243
- Long year
- 274
Source NOAA station
CYLBURN, MD US
6.5 mi · 30 yrs of record (1991–2020) · 235 ft elev.
Data from CYLBURN, MD US, 6.5 miles away with 30-year NOAA record (1991-2020).
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