Charlestown New Hampshire Climate Data

Monthly Average Climate Data for Charlestown New Hampshire

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.8 °C-0.8 °C71.12 mm
February-11.2 °C1 °C60.2 mm
March-6.2 °C5.5 °C73.15 mm
April0.4 °C13 °C80.52 mm
May6.6 °C19.9 °C86.87 mm
June11.8 °C24.8 °C99.31 mm
July14.8 °C27.8 °C102.36 mm
August13.7 °C26.9 °C98.04 mm
September9.4 °C22.9 °C93.47 mm
October2.9 °C15.3 °C119.38 mm
November-2.2 °C8.3 °C79.76 mm
December-7.4 °C1.8 °C88.14 mm
Annual1.7 °C13.9 °C1052.32 mm

Climate Data for Charlestown New Hampshire

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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