Winter Harbor Maine Climate Data

Monthly Average Climate Data for Winter Harbor Maine

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.9 °F31.7 °F4.58 in.
February18.8 °F32.9 °F3.82 in.
March25.2 °F39.0 °F4.71 in.
April34.7 °F49.2 °F4.44 in.
May43.1 °F59.5 °F4.34 in.
June51.3 °F68.7 °F4.13 in.
July56.9 °F74.4 °F3.21 in.
August57.3 °F74.2 °F2.96 in.
September52.3 °F67.3 °F4.06 in.
October43.6 °F56.7 °F5.64 in.
November34.8 °F46.7 °F5.46 in.
December24.8 °F37.8 °F5.53 in.
Annual38.4 °F53.2 °F52.88 in.

Climate Data for Winter Harbor Maine

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year