Swanzey New Hampshire Climate Data

Monthly Average Climate Data for Swanzey New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.3 °F31.2 °F3.27 in.
February12.6 °F34.4 °F2.86 in.
March21.3 °F42.7 °F3.4 in.
April32.7 °F56.1 °F3.53 in.
May43.5 °F67.9 °F3.74 in.
June52.9 °F76.5 °F4.31 in.
July58.0 °F81.6 °F4.31 in.
August56.1 °F80.0 °F4.15 in.
September48.1 °F72.4 °F4.09 in.
October37.2 °F59.8 °F4.88 in.
November27.7 °F47.4 °F3.53 in.
December18.8 °F36.6 °F3.94 in.
Annual35 °F57.2 °F46.01 in.

Climate Data for Swanzey New Hampshire

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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