Adelphi, MD Weather & Growing Conditions
Today
86°F
Partly Sunny
Partly sunny, with a high near 86. East wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Partly Sunny | 5 to 8 mph E | 2% |
| Tonight | 71°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 2 to 7 mph E | 56% |
| Wednesday | 87°F | Showers And Thunderstorms Likely | 2 to 7 mph SE | 67% |
| Wednesday Night | 73°F | Chance Showers And Thunderstorms | 3 to 7 mph S | 53% |
| Thursday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 10 mph SW | 16% |
| Thursday Night | 75°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph SW | 20% |
| Friday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 8 mph SW | 37% |
| Friday Night | 73°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 50% |
| Saturday | 90°F | Showers And Thunderstorms Likely | 2 to 6 mph SW | 55% |
| Saturday Night | 72°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph W | 55% |
| Sunday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 21% |
| Sunday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 21% |
| Monday | 93°F | Mostly Sunny | 2 to 7 mph W | 12% |
| Monday Night | 74°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Adelphi, MD
Last spring frost
Apr 10
First fall frost
Nov 1
Growing season
202 days
Hardiness zone
7b
Explore more for Adelphi, MD: full frost dates · planting calendar · Maryland frost dates
Climate data from the nearest NOAA station, Beltsville, Md (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.