Bethesda Maryland Climate Data

Monthly Average Climate Data for Bethesda Maryland

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January26.4 °F43.3 °F3.13 in.
February27.7 °F46.7 °F2.78 in.
March34.2 °F55.2 °F3.98 in.
April44.2 °F67.2 °F3.47 in.
May54.0 °F75.3 °F4.52 in.
June63.1 °F83.3 °F4.53 in.
July67.9 °F87.5 °F4.59 in.
August66.2 °F85.7 °F3.69 in.
September59.6 °F79.1 °F4.46 in.
October47.6 °F67.6 °F3.93 in.
November37.3 °F56.9 °F3.18 in.
December30.6 °F47.2 °F3.69 in.
Annual46.6 °F66.3 °F45.95 in.

Climate Data for Bethesda 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