Wellesley Massachusetts Climate Data

Monthly Average Climate Data for Wellesley Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.8 °F36.2 °F3.75 in.
February19.5 °F38.8 °F3.26 in.
March27.0 °F46.1 °F4.43 in.
April37.1 °F58.5 °F4.18 in.
May47.0 °F68.9 °F3.69 in.
June56.3 °F77.6 °F4.22 in.
July62.3 °F83.5 °F3.6 in.
August60.7 °F82.1 °F3.88 in.
September53.1 °F75.2 °F3.82 in.
October41.7 °F63.0 °F4.79 in.
November32.5 °F52.1 °F3.96 in.
December24.1 °F41.8 °F4.62 in.
Annual39.9 °F60.3 °F48.2 in.

Climate Data for Wellesley 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 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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