Howard County, Maryland · Frost dates
Howard County frost dates.
First-frost, last-frost, and growing-season length for Howard County, Maryland. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 04-19
- 20%
- 04-14
- 50%
- 04-05
- 80%
- 03-26
- 90%
- 03-21
First fall frost
- 10%
- 10-27
- 20%
- 10-31
- 50%
- 11-09
- 80%
- 11-19
- 90%
- 11-24
28°F — killing freeze
Last spring freeze
- 10%
- 04-08
- 20%
- 04-03
- 50%
- 03-25
- 80%
- 03-15
- 90%
- 03-10
First fall freeze
- 10%
- 11-05
- 20%
- 11-10
- 50%
- 11-21
- 80%
- 12-02
- 90%
- 12-08
Growing season length (days, 28°F threshold)
- Short year
- 211
- Median
- 241
- Long year
- 273
Source NOAA station
LAUREL 3 W, MD US
11.6 mi · 30 yrs of record (1991–2020) · 400 ft elev.
Data from LAUREL 3 W, MD US, 11.6 miles away with 30-year NOAA record (1991-2020).
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