Belmont Massachusetts Climate Data

Monthly Average Climate Data for Belmont Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.5 °F36.3 °F3.95 in.
February20.2 °F38.8 °F3.58 in.
March27.5 °F45.9 °F4.78 in.
April37.8 °F58.0 °F4.3 in.
May47.7 °F68.4 °F3.69 in.
June57.1 °F77.4 °F4.21 in.
July63.0 °F83.2 °F3.74 in.
August61.5 °F81.7 °F3.84 in.
September54.0 °F74.6 °F3.81 in.
October42.7 °F62.7 °F4.82 in.
November33.3 °F52.1 °F4.04 in.
December24.9 °F41.9 °F4.86 in.
Annual40.7 °F60.1 °F49.62 in.

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