Arnold, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arnold, a community in Anne Arundel County, Maryland.
Today
85°F
Partly Sunny
Partly sunny, with a high near 85. Northeast wind around 7 mph.
7-day forecast for Arnold
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Partly Sunny | 7 mph NE | 1% |
| Tonight | 71°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 2 to 6 mph E | 43% |
| Wednesday | 86°F | Chance Showers And Thunderstorms | 3 to 8 mph SE | 59% |
| Wednesday Night | 74°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 8 mph S | 47% |
| Thursday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 12 mph S | 15% |
| Thursday Night | 76°F | Slight Chance Showers And Thunderstorms | 6 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 | 47% |
| Saturday | 90°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph SW | 48% |
| Saturday Night | 73°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 48% |
| 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 | 6 mph SW | 20% |
| Monday | 92°F | Mostly Sunny | 3 to 8 mph SW | 14% |
| Monday Night | 75°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph SW | 19% |
Forecast source: National Weather Service (api.weather.gov) for Arnold (39.043, -76.505). Updated through the day.
Growing snapshot for Arnold
Last spring frost
Mar 27
First fall frost
Nov 13
Growing season
234 days
Hardiness zone
8a
More local growing data for Arnold: nearby ZIP 21012 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Annapolis
Annapolis Neck
Arden on the Severn
Baltimore Highlands
Brooklyn Park
Cape St. Claire
Chesapeake Beach
Crofton
Crownsville
Deale
Edgewater
Ferndale
Fort Meade
Friendship
Galesville
Gambrills
Glen Burnie
Herald Harbor
Highland Beach
Lake Shore
Linthicum
Maryland City
Mayo
Naval Academy
North Beach
Odenton
Parole
Pasadena
Riva
Riviera Beach
Climate data from the nearest NOAA station, Annapolis Police Brks, Md (3.7 mi from Arnold). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.