Jarrettsville, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jarrettsville, a community in Harford County, Maryland.
This Afternoon
81°F
Mostly Sunny
Mostly sunny, with a high near 81. North wind around 10 mph.
7-day forecast for Jarrettsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Mostly Sunny | 10 mph N | 10% |
| Tonight | 57°F | Mostly Clear | 10 mph N | 10% |
| Saturday | 76°F | Mostly Sunny | 10 mph E | 5% |
| Saturday Night | 64°F | Mostly Cloudy then Scattered Rain Showers | 8 mph SE | 30% |
| Sunday | 78°F | Rain Showers Likely | 8 to 14 mph S | 69% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 6 to 9 mph W | 70% |
| Monday | 71°F | Chance Rain Showers | 9 to 13 mph NE | 40% |
| Monday Night | 57°F | Chance Rain Showers | 8 to 12 mph NE | 44% |
| Tuesday | 63°F | Chance Rain Showers | 14 mph NE | 50% |
| Tuesday Night | 53°F | Chance Rain Showers | 15 mph NE | 50% |
| Wednesday | 61°F | Chance Rain Showers | 14 mph NE | 44% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 14 mph NE | 45% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 42% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 7 to 10 mph N | 38% |
Forecast source: National Weather Service (api.weather.gov) for Jarrettsville (39.601, -76.472). Updated through the day.
Growing snapshot for Jarrettsville
Last spring frost
Apr 3
First fall frost
Nov 6
Growing season
217 days
Hardiness zone
7a
More local growing data for Jarrettsville: nearby ZIP 21084 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Aberdeen
Aberdeen Proving Ground
Abingdon
Bel Air
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Darlington
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Fallston
Havre de Grace
Joppatowne
Perryman
Pylesville
Riverside
Climate data from the nearest NOAA station, Conowingo Dam, Md (15.8 mi from Jarrettsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.