Adelphi Maryland Climate Data

Monthly Average Climate Data for Adelphi Maryland

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January26.4 °F43.5 °F3.1 in.
February27.9 °F46.7 °F2.72 in.
March34.5 °F55.0 °F3.96 in.
April44.4 °F66.9 °F3.45 in.
May54.2 °F75.2 °F4.47 in.
June63.5 °F83.6 °F4.6 in.
July68.2 °F88.1 °F4.48 in.
August66.5 °F86.3 °F3.72 in.
September59.8 °F79.6 °F4.46 in.
October47.5 °F68.1 °F3.81 in.
November37.2 °F57.2 °F3.12 in.
December30.5 °F47.4 °F3.72 in.
Annual46.7 °F66.5 °F45.61 in.

Climate Data for Adelphi Maryland

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationCfa - Humid Subtropical Climate