Garrison Maryland Climate Data

Monthly Average Climate Data for Garrison Maryland

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.1 °C5.6 °C91.19 mm
February-3.2 °C7.3 °C72.14 mm
March0.6 °C12 °C107.7 mm
April6.2 °C18.8 °C98.55 mm
May11.5 °C23.8 °C111 mm
June16.6 °C28.5 °C103.63 mm
July19.2 °C30.9 °C111.51 mm
August18.2 °C29.8 °C85.09 mm
September14.5 °C26.1 °C123.19 mm
October7.9 °C19.7 °C108.2 mm
November2.5 °C13.4 °C84.33 mm
December-1.4 °C7.8 °C98.81 mm
Annual7.4 °C18.6 °C1195.34 mm

Climate Data for Garrison 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 : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate