Charlestown, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charlestown, a town in Cecil County, Maryland.
This Afternoon
69°F
Mostly Sunny
Mostly sunny, with a high near 69. South wind around 5 mph.
7-day forecast for Charlestown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Sunny | 5 mph S | 2% |
| Tonight | 52°F | Mostly Clear then Patchy Fog | 2 mph S | 3% |
| Wednesday | 74°F | Patchy Fog then Mostly Sunny | 1 to 6 mph S | 3% |
| Wednesday Night | 60°F | Mostly Cloudy | 5 mph SE | 10% |
| Thursday | 73°F | Chance Light Rain | 5 to 8 mph S | 51% |
| Thursday Night | 62°F | Light Rain | 5 mph SW | 80% |
| Friday | 70°F | Rain | 3 mph NW | 80% |
| Friday Night | 52°F | Light Rain | 1 to 5 mph NW | 77% |
| Saturday | 66°F | Mostly Sunny | 5 to 8 mph NW | 12% |
| Saturday Night | 42°F | Partly Cloudy | 6 mph NW | 12% |
| Sunday | 62°F | Mostly Sunny | 3 to 7 mph NW | 4% |
| Sunday Night | 41°F | Partly Cloudy then Slight Chance Light Rain | 5 mph W | 16% |
| Monday | 62°F | Slight Chance Light Rain | 6 to 10 mph NW | 16% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 10% |
Forecast source: National Weather Service (api.weather.gov) for Charlestown (39.582, -75.987). Updated through the day.
Growing snapshot for Charlestown
Last spring frost
Apr 3
First fall frost
Nov 6
Growing season
217 days
Hardiness zone
7b
More local growing data for Charlestown: nearby ZIP 21914 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Conowingo Dam, Md (11.6 mi from Charlestown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.