Marlborough Massachusetts Climate Data

Monthly Average Climate Data for Marlborough Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.7 °C1.3 °C96.01 mm
February-7.8 °C2.8 °C85.6 mm
March-3.5 °C7 °C114.81 mm
April2.4 °C14.1 °C109.22 mm
May8.3 °C20.1 °C92.46 mm
June13.6 °C24.7 °C109.73 mm
July16.8 °C27.8 °C95.25 mm
August15.9 °C26.9 °C101.35 mm
September11.4 °C23.2 °C99.82 mm
October5.2 °C16.5 °C124.21 mm
November-0.3 °C10.3 °C98.81 mm
December-5.1 °C4.4 °C119.89 mm
Annual4 °C14.9 °C1247.16 mm

Climate Data for Marlborough Massachusetts

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation