Charlestown Maryland Climate Data

Monthly Average Climate Data for Charlestown Maryland

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.8 °F41.9 °F3.43 in.
February25.7 °F44.4 °F2.89 in.
March32.6 °F52.5 °F4.28 in.
April43.3 °F63.5 °F3.8 in.
May52.9 °F73.2 °F3.89 in.
June62.3 °F82.1 °F4.64 in.
July67.5 °F86.5 °F4.57 in.
August65.9 °F85.0 °F4.23 in.
September59.0 °F78.5 °F4.52 in.
October46.8 °F66.8 °F4.2 in.
November37.0 °F55.7 °F3.28 in.
December29.9 °F46.0 °F4.17 in.
Annual45.6 °F64.7 °F47.9 in.

Climate Data for Charlestown Maryland

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 Days
Plant Hardiness ZoneZone 7a : 0°F to 5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation