Grand Isle Maine Climate Data

Monthly Average Climate Data for Grand Isle Maine

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-18.7 °C-6.9 °C83.57 mm
February-17.9 °C-5.1 °C67.56 mm
March-11.3 °C0.6 °C72.14 mm
April-2.6 °C8.2 °C74.93 mm
May4.1 °C16.6 °C87.88 mm
June9.2 °C21.7 °C105.41 mm
July12.4 °C24.6 °C108.46 mm
August11.4 °C24 °C90.68 mm
September7 °C19.3 °C97.28 mm
October1.2 °C11.4 °C110.74 mm
November-4.2 °C3.9 °C92.71 mm
December-12.7 °C-3.1 °C92.46 mm
Annual-1.8 °C9.6 °C1083.82 mm

Climate Data for Grand Isle Maine

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 4a : -34.4°C to -31.7°C
Plant Hardiness Zone - 2012Zone 3b : -37.2°C to -34.4°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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