Adelphi, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Adelphi, a community in Prince George's County, Maryland.
Overnight
53°F
Mostly Clear
Mostly clear, with a low around 53. South wind around 3 mph.
7-day forecast for Adelphi
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Clear | 3 mph S | 2% |
| Wednesday | 75°F | Mostly Sunny | 3 to 9 mph S | 2% |
| Wednesday Night | 61°F | Mostly Cloudy then Chance Light Rain | 7 mph S | 32% |
| Thursday | 75°F | Chance Light Rain | 9 mph S | 47% |
| Thursday Night | 62°F | Light Rain Likely | 2 to 7 mph SW | 55% |
| Friday | 70°F | Rain Likely | 5 mph NW | 71% |
| Friday Night | 52°F | Light Rain Likely | 2 to 7 mph NW | 71% |
| Saturday | 65°F | Mostly Sunny | 7 to 10 mph NW | 11% |
| Saturday Night | 44°F | Partly Cloudy | 8 mph NW | 11% |
| Sunday | 61°F | Mostly Sunny | 5 to 8 mph NW | 5% |
| Sunday Night | 43°F | Slight Chance Light Rain | 5 to 8 mph W | 20% |
| Monday | 61°F | Slight Chance Light Rain | 9 to 13 mph W | 20% |
| Monday Night | 41°F | Slight Chance Light Rain | 5 to 9 mph W | 19% |
| Tuesday | 64°F | Sunny | 7 to 10 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov) for Adelphi (38.997, -76.967). Updated through the day.
Growing snapshot for Adelphi
Last spring frost
Apr 10
First fall frost
Nov 1
Growing season
202 days
Hardiness zone
7b
More local growing data for Adelphi: nearby ZIP 20783 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Beltsville, Md (3 mi from Adelphi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.