Thomaston Maine Climate Data

Monthly Average Climate Data for Thomaston Maine

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.6 °F30.7 °F4.5 in.
February15.1 °F33.0 °F3.78 in.
March23.3 °F40.2 °F4.77 in.
April33.7 °F51.4 °F4.71 in.
May43.3 °F61.7 °F3.76 in.
June52.4 °F70.4 °F4.04 in.
July58.4 °F76.4 °F3.26 in.
August57.5 °F75.9 °F3.0 in.
September50.7 °F69.2 °F4.44 in.
October40.3 °F57.6 °F5.27 in.
November31.0 °F46.9 °F4.89 in.
December20.8 °F36.6 °F4.97 in.
Annual36.7 °F54.2 °F51.39 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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