Arnold, MD Weather & Growing Conditions
Today
85°F
Partly Sunny
Partly sunny, with a high near 85. Northeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Partly Sunny | 7 mph NE | 1% |
| Tonight | 72°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 2 to 6 mph E | 43% |
| Wednesday | 86°F | Chance Showers And Thunderstorms | 2 to 8 mph SE | 60% |
| Wednesday Night | 74°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 8 mph S | 48% |
| Thursday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 12 mph S | 15% |
| Thursday Night | 76°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 18% |
| Friday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 8 mph SW | 40% |
| Friday Night | 74°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 48% |
| Saturday | 90°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph SW | 49% |
| Saturday Night | 73°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 49% |
| Sunday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph SW | 20% |
| Sunday Night | 75°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph SW | 20% |
| Monday | 93°F | Mostly Sunny | 2 to 8 mph SW | 14% |
| Monday Night | 75°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph SW | 19% |
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 (3.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.