Charleston Maine Climate Data

Monthly Average Climate Data for Charleston Maine

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January6.1 °F26.2 °F3.32 in.
February7.5 °F29.7 °F2.75 in.
March18.4 °F38.8 °F3.34 in.
April30.4 °F51.8 °F3.76 in.
May41.4 °F64.7 °F3.64 in.
June51.0 °F73.4 °F4.41 in.
July56.8 °F79.0 °F3.56 in.
August55.0 °F77.9 °F3.57 in.
September47.0 °F70.0 °F3.7 in.
October36.4 °F56.7 °F4.85 in.
November27.1 °F44.0 °F4.01 in.
December15.4 °F32.6 °F4.02 in.
Annual32.7 °F53.7 °F44.93 in.

Climate Data for Charleston Maine

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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