St. Leonard, MD Weather & Growing Conditions
Tonight
66°F
Mostly Cloudy
Mostly cloudy, with a low around 66. Northeast wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Mostly Cloudy | 10 mph NE | 2% |
| Saturday | 79°F | Partly Sunny | 10 mph NE | 10% |
| Saturday Night | 68°F | Mostly Cloudy | 10 mph SE | 10% |
| Sunday | 83°F | Mostly Sunny | 7 to 13 mph S | 12% |
| Sunday Night | 69°F | Showers And Thunderstorms Likely | 7 to 13 mph SW | 55% |
| Monday | 77°F | Chance Rain Showers | 8 to 13 mph N | 48% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 12 mph NE | 49% |
| Tuesday | 72°F | Chance Rain Showers | 13 to 18 mph NE | 53% |
| Tuesday Night | 61°F | Chance Rain Showers | 17 mph NE | 53% |
| Wednesday | 68°F | Chance Rain Showers | 15 to 20 mph NE | 50% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms | 14 to 18 mph NE | 50% |
| Thursday | 68°F | Chance Showers And Thunderstorms | 15 to 18 mph NE | 40% |
| Thursday Night | 58°F | Chance Showers And Thunderstorms | 9 to 16 mph N | 35% |
| Friday | 72°F | Chance Rain Showers | 12 to 15 mph N | 25% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Leonard, MD
Last spring frost
Apr 17
First fall frost
Oct 27
Growing season
195 days
Hardiness zone
7b
Explore more for St. Leonard, MD: full frost dates · planting calendar · Maryland frost dates
Climate data from the nearest NOAA station, Mechanicsville 5 Ne, Md (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.