Marlborough Massachusetts Climate Data

Monthly Average Climate Data for Marlborough Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.4 °F34.3 °F3.78 in.
February17.9 °F37.0 °F3.37 in.
March25.7 °F44.6 °F4.52 in.
April36.3 °F57.3 °F4.3 in.
May47.0 °F68.1 °F3.64 in.
June56.4 °F76.4 °F4.32 in.
July62.2 °F82.1 °F3.75 in.
August60.7 °F80.5 °F3.99 in.
September52.6 °F73.7 °F3.93 in.
October41.3 °F61.7 °F4.89 in.
November31.5 °F50.5 °F3.89 in.
December22.9 °F40.0 °F4.72 in.
Annual39.2 °F58.9 °F49.1 in.

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 : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation