Thomaston Maine Climate Data

Monthly Average Climate Data for Thomaston Maine

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.2 °C-0.7 °C114.3 mm
February-9.4 °C0.6 °C96.01 mm
March-4.8 °C4.6 °C121.16 mm
April0.9 °C10.8 °C119.63 mm
May6.3 °C16.5 °C95.5 mm
June11.3 °C21.3 °C102.62 mm
July14.7 °C24.7 °C82.8 mm
August14.2 °C24.4 °C76.2 mm
September10.4 °C20.7 °C112.78 mm
October4.6 °C14.2 °C133.86 mm
November-0.6 °C8.3 °C124.21 mm
December-6.2 °C2.6 °C126.24 mm
Annual2.6 °C12.3 °C1305.31 mm

Climate Data for Thomaston Maine

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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