Charlestown New Hampshire Climate Data

Monthly Average Climate Data for Charlestown New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.8 °F30.5 °F2.8 in.
February11.9 °F33.8 °F2.37 in.
March20.9 °F41.9 °F2.88 in.
April32.8 °F55.4 °F3.17 in.
May43.8 °F67.9 °F3.42 in.
June53.3 °F76.7 °F3.91 in.
July58.7 °F82.0 °F4.03 in.
August56.6 °F80.4 °F3.86 in.
September48.9 °F73.2 °F3.68 in.
October37.3 °F59.5 °F4.7 in.
November28.1 °F47.0 °F3.14 in.
December18.6 °F35.3 °F3.47 in.
Annual35.1 °F57 °F41.43 in.

Climate Data for Charlestown New Hampshire

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateJun. 1 - Jun. 10
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 ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year