Westford Massachusetts Climate Data

Monthly Average Climate Data for Westford Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.4 °F35.2 °F3.62 in.
February16.3 °F37.3 °F3.35 in.
March24.1 °F45.0 °F4.35 in.
April34.7 °F57.9 °F4.07 in.
May45.1 °F69.0 °F3.8 in.
June54.5 °F77.5 °F4.34 in.
July60.1 °F83.4 °F3.73 in.
August58.4 °F82.1 °F3.85 in.
September50.2 °F75.0 °F3.91 in.
October38.5 °F62.4 °F4.86 in.
November29.3 °F51.5 °F3.87 in.
December20.9 °F40.8 °F4.51 in.
Annual37.2 °F59.8 °F48.26 in.

Climate Data for Westford Massachusetts

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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