St. Leonard, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Leonard, a community in Calvert County, Maryland.
Today
84°F
Partly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 84. Northeast wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for St. Leonard
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 8 mph NE | 16% |
| Tonight | 73°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph E | 72% |
| Wednesday | 85°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 66% |
| Wednesday Night | 75°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 9 mph S | 23% |
| Thursday | 90°F | Sunny | 8 to 12 mph S | 11% |
| Thursday Night | 76°F | Mostly Clear | 10 mph S | 11% |
| Friday | 90°F | Sunny then Slight Chance Showers And Thunderstorms | 10 mph SW | 24% |
| Friday Night | 75°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 36% |
| Saturday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 8 mph SW | 40% |
| Saturday Night | 74°F | Chance Showers And Thunderstorms | 7 mph SW | 40% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 21% |
| Sunday Night | 75°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SW | 21% |
| Monday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 mph SW | 15% |
| Monday Night | 76°F | Slight Chance Showers And Thunderstorms | 6 mph SW | 17% |
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 Aug 4, 2026.