Upper Marlboro, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Upper Marlboro, a town in Prince George's County, Maryland.
Today
84°F
Partly Sunny
Partly sunny, with a high near 84. East wind around 7 mph.
7-day forecast for Upper Marlboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny | 7 mph E | 5% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph E | 56% |
| Wednesday | 86°F | Showers And Thunderstorms Likely | 2 to 8 mph SE | 67% |
| Wednesday Night | 74°F | Chance Showers And Thunderstorms then Partly Cloudy | 7 mph S | 46% |
| Thursday | 91°F | Mostly Sunny | 6 to 10 mph S | 13% |
| Thursday Night | 75°F | Partly Cloudy | 6 to 9 mph SW | 13% |
| Friday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 8 mph SW | 33% |
| Friday Night | 74°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 45% |
| Saturday | 91°F | Partly Sunny then Chance Showers And Thunderstorms | 7 mph SW | 51% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 51% |
| Sunday | 91°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 5 mph W | 21% |
| Sunday Night | 74°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 21% |
| Monday | 93°F | Mostly Sunny | 3 to 7 mph W | 11% |
| Monday Night | 74°F | Slight Chance Showers And Thunderstorms | 3 to 7 mph SW | 17% |
Forecast source: National Weather Service (api.weather.gov) for Upper Marlboro (38.816, -76.754). Updated through the day.
Growing snapshot for Upper Marlboro
Last spring frost
Apr 9
First fall frost
Oct 29
Growing season
203 days
Hardiness zone
7b
More local growing data for Upper Marlboro: nearby ZIP 20772 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Upper Marlboro 3 Nnw, Md (5 mi from Upper Marlboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.