Belmont Massachusetts Climate Data

Monthly Average Climate Data for Belmont Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.5 °C2.4 °C100.33 mm
February-6.6 °C3.8 °C90.93 mm
March-2.5 °C7.7 °C121.41 mm
April3.2 °C14.4 °C109.22 mm
May8.7 °C20.2 °C93.73 mm
June13.9 °C25.2 °C106.93 mm
July17.2 °C28.4 °C95 mm
August16.4 °C27.6 °C97.54 mm
September12.2 °C23.7 °C96.77 mm
October5.9 °C17.1 °C122.43 mm
November0.7 °C11.2 °C102.62 mm
December-3.9 °C5.5 °C123.44 mm
Annual4.8 °C15.6 °C1260.35 mm

Climate Data for Belmont Massachusetts

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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