Dennis Massachusetts Climate Data

Monthly Average Climate Data for Dennis Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.6 °F38.4 °F4.33 in.
February25.5 °F39.2 °F3.67 in.
March30.6 °F44.2 °F4.67 in.
April39.1 °F52.8 °F4.4 in.
May48.3 °F62.5 °F3.41 in.
June57.6 °F71.5 °F3.45 in.
July64.7 °F78.4 °F2.84 in.
August64.0 °F77.6 °F3.33 in.
September57.7 °F71.9 °F4.18 in.
October47.6 °F61.7 °F4.64 in.
November38.5 °F52.3 °F4.06 in.
December30.7 °F44.0 °F5.18 in.
Annual44.1 °F57.9 °F48.16 in.

Climate Data for Dennis Massachusetts

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year