Winthrop Maine Climate Data

Monthly Average Climate Data for Winthrop Maine

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January9.9 °F29.0 °F3.6 in.
February11.5 °F31.9 °F3.07 in.
March21.5 °F40.3 °F3.65 in.
April32.7 °F53.0 °F4.19 in.
May43.5 °F64.9 °F3.55 in.
June53.1 °F73.7 °F4.54 in.
July58.9 °F79.4 °F3.59 in.
August57.4 °F78.5 °F3.56 in.
September49.7 °F71.1 °F3.77 in.
October38.7 °F58.2 °F5.34 in.
November28.9 °F46.0 °F4.27 in.
December18.2 °F35.1 °F4.3 in.
Annual35.3 °F55.1 °F47.43 in.

Climate Data for Winthrop Maine

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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