Fallston, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fallston, a community in Harford County, Maryland.
Tonight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. North wind around 9 mph.
7-day forecast for Fallston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Partly Cloudy | 9 mph N | 2% |
| Saturday | 77°F | Mostly Sunny | 10 mph NE | 5% |
| Saturday Night | 64°F | Mostly Cloudy then Scattered Rain Showers | 8 mph SE | 30% |
| Sunday | 79°F | Rain Showers Likely | 8 to 14 mph S | 65% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 6 to 10 mph W | 70% |
| Monday | 72°F | Chance Rain Showers | 12 mph NE | 41% |
| Monday Night | 58°F | Chance Rain Showers | 8 to 12 mph NE | 44% |
| Tuesday | 64°F | Chance Rain Showers | 14 mph NE | 49% |
| Tuesday Night | 54°F | Chance Rain Showers | 14 mph NE | 49% |
| Wednesday | 61°F | Chance Rain Showers | 15 mph NE | 44% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 45% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 41% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 6 to 9 mph N | 37% |
| Friday | 67°F | Slight Chance Rain Showers | 10 mph N | 24% |
Forecast source: National Weather Service (api.weather.gov) for Fallston (39.534, -76.439). Updated through the day.
Growing snapshot for Fallston
Last spring frost
Apr 10
First fall frost
Oct 30
Growing season
201 days
Hardiness zone
7b
More local growing data for Fallston: nearby ZIP 21047 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Aberdeen
Aberdeen Proving Ground
Abingdon
Bel Air
Bel Air North
Bel Air South
Darlington
Edgewood
Havre de Grace
Jarrettsville
Joppatowne
Perryman
Pylesville
Riverside
Climate data from the nearest NOAA station, Aberdeen Phillips Fld, Md (14.8 mi from Fallston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.