Arnold, MD Weather & Growing Conditions
Tonight
62°F
Partly Cloudy
Partly cloudy, with a low around 62. North wind around 12 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Partly Cloudy | 12 mph N | 2% |
| Saturday | 79°F | Partly Sunny | 8 to 12 mph NE | 5% |
| Saturday Night | 66°F | Mostly Cloudy then Isolated Rain Showers | 10 mph SE | 20% |
| Sunday | 83°F | Chance Rain Showers | 9 to 15 mph S | 33% |
| Sunday Night | 66°F | Showers And Thunderstorms Likely | 7 to 12 mph W | 69% |
| Monday | 76°F | Chance Rain Showers | 10 to 14 mph N | 45% |
| Monday Night | 62°F | Chance Rain Showers | 10 to 14 mph NE | 47% |
| Tuesday | 71°F | Chance Rain Showers | 14 to 17 mph NE | 54% |
| Tuesday Night | 58°F | Chance Rain Showers | 17 mph NE | 54% |
| Wednesday | 68°F | Chance Rain Showers | 18 mph NE | 47% |
| Wednesday Night | 59°F | Chance Showers And Thunderstorms | 14 to 18 mph NE | 47% |
| Thursday | 69°F | Chance Showers And Thunderstorms | 16 mph NE | 39% |
| Thursday Night | 57°F | Chance Showers And Thunderstorms | 8 to 15 mph N | 34% |
| Friday | 72°F | Slight Chance Rain Showers | 13 mph N | 23% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arnold, MD
Last spring frost
Mar 27
First fall frost
Nov 13
Growing season
234 days
Hardiness zone
8a
Explore more for Arnold, MD: full frost dates · planting calendar · Maryland frost dates
Climate data from the nearest NOAA station, Annapolis Police Brks, Md (3.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.