Cape St. Claire, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cape St. Claire, a community in Anne Arundel County, Maryland.
This Afternoon
84°F
Mostly Sunny
Mostly sunny, with a high near 84. North wind around 10 mph.
7-day forecast for Cape St. Claire
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Mostly Sunny | 10 mph N | 2% |
| Tonight | 65°F | Partly Cloudy | 10 to 14 mph N | 2% |
| Saturday | 78°F | Partly Sunny | 8 to 14 mph NE | 5% |
| Saturday Night | 68°F | Mostly Cloudy then Isolated Rain Showers | 12 mph SE | 20% |
| Sunday | 82°F | Chance Rain Showers | 10 to 16 mph S | 31% |
| Sunday Night | 68°F | Showers And Thunderstorms Likely | 7 to 13 mph W | 69% |
| Monday | 75°F | Chance Rain Showers | 10 to 14 mph N | 45% |
| Monday Night | 65°F | Chance Rain Showers | 12 to 17 mph NE | 46% |
| Tuesday | 69°F | Chance Rain Showers | 17 to 21 mph NE | 54% |
| Tuesday Night | 62°F | Chance Rain Showers | 21 mph NE | 54% |
| Wednesday | 66°F | Chance Rain Showers | 21 mph NE | 47% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms | 21 mph NE | 47% |
| Thursday | 67°F | Chance Showers And Thunderstorms | 20 mph NE | 38% |
| Thursday Night | 61°F | Chance Showers And Thunderstorms | 12 to 16 mph NE | 34% |
Forecast source: National Weather Service (api.weather.gov) for Cape St. Claire (39.044, -76.445). Updated through the day.
Growing snapshot for Cape St. Claire
Last spring frost
Mar 23
First fall frost
Nov 20
Growing season
241 days
Hardiness zone
8a
More local growing data for Cape St. Claire: nearby ZIP 21409 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Annapolis Naf, Md (2.8 mi from Cape St. Claire). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.