St. Leonard, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Leonard, a community in Calvert County, Maryland.
Tonight
69°F
Mostly Cloudy
Mostly cloudy, with a low around 69. Southeast wind around 10 mph.
7-day forecast for St. Leonard
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Mostly Cloudy | 10 mph SE | 5% |
| Sunday | 82°F | Mostly Cloudy | 8 to 13 mph S | 11% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 9 mph W | 44% |
| Monday | 75°F | Chance Rain Showers | 10 to 15 mph NE | 30% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 14 mph NE | 42% |
| Tuesday | 73°F | Chance Rain Showers | 14 to 18 mph NE | 47% |
| Tuesday Night | 63°F | Chance Showers And Thunderstorms | 18 mph NE | 47% |
| Wednesday | 69°F | Chance Rain Showers | 17 to 22 mph NE | 43% |
| Wednesday Night | 63°F | Chance Rain Showers | 17 to 21 mph NE | 38% |
| Thursday | 69°F | Chance Rain Showers | 18 to 22 mph NE | 37% |
| Thursday Night | 60°F | Chance Rain Showers | 16 to 21 mph N | 36% |
| Friday | 69°F | Chance Rain Showers | 17 to 21 mph N | 34% |
| Friday Night | 60°F | Chance Rain Showers | 10 to 17 mph N | 26% |
| Saturday | 71°F | Slight Chance Rain Showers | 13 to 16 mph N | 19% |
Forecast source: National Weather Service (api.weather.gov) for St. Leonard (38.467, -76.499). Updated through the day.
Growing snapshot for St. Leonard
Last spring frost
Mar 22
First fall frost
Nov 26
Growing season
248 days
Hardiness zone
8a
More local growing data for St. Leonard: nearby ZIP 20685 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Broomes Island
Calvert Beach
Chesapeake Ranch Estates
Drum Point
Dunkirk
Huntingtown
Long Beach
Lusby
Owings
Prince Frederick
Solomons
Climate data from the nearest NOAA station, Solomons, Md (8.9 mi from St. Leonard). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.