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
68°F
Mostly Cloudy
Mostly cloudy, with a low around 68. Northeast wind 8 to 13 mph.
7-day forecast for St. Leonard
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Mostly Cloudy | 8 to 13 mph NE | 2% |
| Saturday | 78°F | Partly Sunny | 9 to 13 mph NE | 10% |
| Saturday Night | 69°F | Mostly Cloudy | 12 mph SE | 10% |
| Sunday | 82°F | Mostly Sunny | 8 to 14 mph S | 12% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 7 to 12 mph SW | 54% |
| Monday | 76°F | Chance Rain Showers | 9 to 13 mph N | 49% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 49% |
| Tuesday | 71°F | Chance Rain Showers | 15 to 21 mph NE | 52% |
| Tuesday Night | 63°F | Chance Rain Showers | 20 mph NE | 52% |
| Wednesday | 68°F | Chance Rain Showers | 18 to 22 mph NE | 49% |
| Wednesday Night | 62°F | Chance Showers And Thunderstorms | 16 to 21 mph NE | 49% |
| Thursday | 68°F | Chance Showers And Thunderstorms | 17 to 21 mph NE | 40% |
| Thursday Night | 61°F | Chance Showers And Thunderstorms | 12 to 18 mph N | 35% |
| Friday | 71°F | Chance Rain Showers | 13 to 16 mph N | 25% |
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 19, 2026.