St. Leonard, MD Weather & Growing Conditions
Overnight
54°F
Mostly Clear
Mostly clear, with a low around 54. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 74°F | Patchy Fog then Sunny | 3 to 8 mph S | 1% |
| Wednesday Night | 62°F | Mostly Cloudy | 7 mph S | 5% |
| Thursday | 76°F | Chance Rain Showers | 6 to 9 mph S | 26% |
| Thursday Night | 63°F | Showers And Thunderstorms | 6 mph S | 81% |
| Friday | 70°F | Showers And Thunderstorms then Light Rain | 6 mph SW | 87% |
| Friday Night | 53°F | Light Rain | 2 to 6 mph NW | 75% |
| Saturday | 66°F | Mostly Sunny | 7 to 12 mph NW | 5% |
| Saturday Night | 44°F | Mostly Clear | 8 mph NW | 4% |
| Sunday | 61°F | Sunny | 6 to 10 mph W | 3% |
| Sunday Night | 43°F | Mostly Clear | 6 mph W | 6% |
| Monday | 61°F | Sunny | 6 to 14 mph NW | 6% |
| Monday Night | 41°F | Mostly Clear | 6 mph W | 5% |
| Tuesday | 64°F | Sunny | 6 to 9 mph SW | 3% |
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 Nov 4, 2026.