Calvert County, Maryland · Frost dates
Calvert County frost dates.
First-frost, last-frost, and growing-season length for Calvert County, Maryland. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 05-02
- 20%
- 04-27
- 50%
- 04-17
- 80%
- 04-05
- 90%
- 03-31
First fall frost
- 10%
- 10-12
- 20%
- 10-17
- 50%
- 10-27
- 80%
- 11-04
- 90%
- 11-09
28°F — killing freeze
Last spring freeze
- 10%
- 04-17
- 20%
- 04-11
- 50%
- 04-02
- 80%
- 03-25
- 90%
- 03-19
First fall freeze
- 10%
- 10-24
- 20%
- 10-28
- 50%
- 11-06
- 80%
- 11-17
- 90%
- 11-23
Growing season length (days, 28°F threshold)
- Short year
- 190
- Median
- 218
- Long year
- 249
Source NOAA station
MECHANICSVILLE 5 NE, MD US
10.8 mi · 30 yrs of record (1991–2020) · 100 ft elev.
Data from MECHANICSVILLE 5 NE, MD US, 10.8 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
14-day free trial. No credit card. Cancel anytime.