Harford County, Maryland · Frost dates
Harford County frost dates.
First-frost, last-frost, and growing-season length for Harford County, Maryland. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 04-30
- 20%
- 04-22
- 50%
- 04-10
- 80%
- 03-31
- 90%
- 03-27
First fall frost
- 10%
- 10-14
- 20%
- 10-20
- 50%
- 10-30
- 80%
- 11-06
- 90%
- 11-12
28°F — killing freeze
Last spring freeze
- 10%
- 04-12
- 20%
- 04-06
- 50%
- 03-29
- 80%
- 03-19
- 90%
- 03-13
First fall freeze
- 10%
- 10-28
- 20%
- 11-01
- 50%
- 11-10
- 80%
- 11-20
- 90%
- 11-27
Growing season length (days, 28°F threshold)
- Short year
- 199
- Median
- 226
- Long year
- 259
Source NOAA station
ABERDEEN PHILLIPS FLD, MD US
8.3 mi · 30 yrs of record (1991–2020) · 57 ft elev.
Data from ABERDEEN PHILLIPS FLD, MD US, 8.3 miles away with 30-year NOAA record (1991-2020).
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