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.
Today
72°F
Mostly Sunny
Mostly sunny, with a high near 72. South wind 5 to 9 mph.
7-day forecast for Cape St. Claire
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 5 to 9 mph S | 1% |
| Tonight | 62°F | Mostly Cloudy | 9 mph S | 11% |
| Thursday | 71°F | Chance Rain Showers | 10 mph S | 45% |
| Thursday Night | 62°F | Showers And Thunderstorms Likely | 3 to 9 mph S | 71% |
| Friday | 69°F | Showers And Thunderstorms Likely then Light Rain | 2 to 6 mph NW | 78% |
| Friday Night | 53°F | Light Rain Likely | 2 to 8 mph NW | 60% |
| Saturday | 64°F | Mostly Sunny | 9 to 13 mph NW | 5% |
| Saturday Night | 47°F | Partly Cloudy | 14 mph NW | 5% |
| Sunday | 60°F | Mostly Sunny | 13 mph NW | 3% |
| Sunday Night | 47°F | Mostly Clear | 8 to 12 mph W | 7% |
| Monday | 60°F | Sunny | 15 mph NW | 7% |
| Monday Night | 46°F | Mostly Clear | 7 to 10 mph W | 5% |
| Tuesday | 63°F | Sunny | 12 mph SW | 2% |
| Tuesday Night | 48°F | Mostly Clear | 9 mph W | 0% |
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 Nov 4, 2026.