Rockville Maryland Climate Data

Monthly Average Climate Data for Rockville Maryland

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January25.7 °F42.3 °F3.1 in.
February27.2 °F45.4 °F2.74 in.
March33.9 °F53.8 °F3.94 in.
April43.9 °F65.8 °F3.39 in.
May53.7 °F74.0 °F4.44 in.
June62.4 °F82.4 °F4.45 in.
July67.2 °F86.7 °F4.28 in.
August65.5 °F84.8 °F3.53 in.
September58.9 °F78.1 °F4.4 in.
October47.0 °F66.7 °F3.83 in.
November37.0 °F56.0 °F3.24 in.
December30.0 °F46.2 °F3.64 in.
Annual46 °F65.2 °F44.98 in.

Climate Data for Rockville 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