Upper Marlboro Maryland Climate Data

Monthly Average Climate Data for Upper Marlboro Maryland

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-2.8 °C6.8 °C77.22 mm
February-2.1 °C8.5 °C67.82 mm
March1.7 °C12.9 °C101.09 mm
April7.3 °C19.6 °C86.11 mm
May12.7 °C24 °C108.71 mm
June17.8 °C28.9 °C117.09 mm
July20.3 °C31.4 °C115.57 mm
August19.4 °C30.6 °C100.84 mm
September15.7 °C27 °C114.81 mm
October8.8 °C20.6 °C100.84 mm
November3.2 °C14.1 °C80.26 mm
December-0.6 °C8.8 °C93.22 mm
Annual8.5 °C19.4 °C1163.58 mm

Climate Data for Upper Marlboro Maryland

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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