Castine Maine Climate Data

Monthly Average Climate Data for Castine Maine

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.9 °C-0.9 °C100.33 mm
February-9.1 °C0.2 °C84.33 mm
March-5.1 °C4.3 °C102.62 mm
April0.7 °C10.8 °C111.51 mm
May6.2 °C17.1 °C96.77 mm
June11.3 °C22.1 °C107.44 mm
July14.7 °C25.3 °C81.28 mm
August14.2 °C25 °C82.04 mm
September10.2 °C20.9 °C99.82 mm
October4.6 °C14.3 °C136.14 mm
November-0.4 °C8 °C119.89 mm
December-5.8 °C2.4 °C119.38 mm
Annual2.6 °C12.5 °C1241.55 mm

Climate Data for Castine 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 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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