Timonium, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Timonium, a community in Baltimore County, Maryland.
Tonight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. North wind around 9 mph.
7-day forecast for Timonium
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Partly Cloudy | 9 mph N | 10% |
| Saturday | 78°F | Mostly Sunny | 9 mph NE | 5% |
| Saturday Night | 65°F | Mostly Cloudy then Scattered Rain Showers | 8 mph SE | 30% |
| Sunday | 81°F | Rain Showers Likely | 8 to 13 mph S | 61% |
| Sunday Night | 64°F | Showers And Thunderstorms Likely | 6 to 9 mph W | 68% |
| Monday | 73°F | Chance Rain Showers | 8 to 12 mph NE | 41% |
| Monday Night | 59°F | Chance Rain Showers | 7 to 10 mph NE | 47% |
| Tuesday | 66°F | Chance Rain Showers | 10 to 14 mph NE | 52% |
| Tuesday Night | 55°F | Chance Rain Showers | 14 mph NE | 52% |
| Wednesday | 62°F | Chance Rain Showers | 14 mph NE | 45% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 13 mph NE | 46% |
| Thursday | 64°F | Chance Showers And Thunderstorms | 13 mph NE | 42% |
| Thursday Night | 54°F | Chance Showers And Thunderstorms | 5 to 9 mph N | 37% |
| Friday | 69°F | Slight Chance Rain Showers | 10 mph N | 23% |
Forecast source: National Weather Service (api.weather.gov) for Timonium (39.446, -76.601). Updated through the day.
Growing snapshot for Timonium
Last spring frost
Apr 2
First fall frost
Nov 7
Growing season
220 days
Hardiness zone
7b
More local growing data for Timonium: nearby ZIP 21093 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Cylburn, Md (5.9 mi from Timonium). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.