Southborough Massachusetts Climate Data

Monthly Average Climate Data for Southborough Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.5 °F35.3 °F3.85 in.
February18.0 °F38.0 °F3.39 in.
March25.8 °F45.6 °F4.59 in.
April36.1 °F58.2 °F4.33 in.
May46.5 °F68.6 °F3.54 in.
June55.9 °F77.1 °F4.26 in.
July61.7 °F82.8 °F3.67 in.
August60.2 °F81.4 °F3.93 in.
September52.0 °F74.7 °F3.82 in.
October40.6 °F62.6 °F4.78 in.
November31.2 °F51.5 °F3.91 in.
December22.9 °F41.1 °F4.85 in.
Annual39 °F59.7 °F48.92 in.

Climate Data for Southborough 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