Westford Massachusetts Climate Data

Monthly Average Climate Data for Westford Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.8 °C1.8 °C91.95 mm
February-8.7 °C2.9 °C85.09 mm
March-4.4 °C7.2 °C110.49 mm
April1.5 °C14.4 °C103.38 mm
May7.3 °C20.6 °C96.52 mm
June12.5 °C25.3 °C110.24 mm
July15.6 °C28.6 °C94.74 mm
August14.7 °C27.8 °C97.79 mm
September10.1 °C23.9 °C99.31 mm
October3.6 °C16.9 °C123.44 mm
November-1.5 °C10.8 °C98.3 mm
December-6.2 °C4.9 °C114.55 mm
Annual2.9 °C15.4 °C1225.8 mm

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 : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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