Fallston, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fallston, a community in Harford County, Maryland.
Overnight
62°F
Mostly Cloudy
Mostly cloudy, with a low around 62. North wind around 5 mph.
7-day forecast for Fallston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Cloudy | 5 mph N | 0% |
| Tuesday | 84°F | Mostly Sunny | 5 mph E | 0% |
| Tuesday Night | 67°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph E | 19% |
| Wednesday | 84°F | Showers And Thunderstorms Likely | 2 to 7 mph E | 72% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 3 to 7 mph S | 48% |
| Thursday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph S | 42% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 42% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 mph SW | 47% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 5 mph SW | 48% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 46% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 5 mph SW | 46% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 16% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph SW | 16% |
| Monday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 8 mph W | 18% |
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
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Abingdon
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Darlington
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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 Aug 4, 2026.