Alstead New Hampshire Climate Data

Monthly Average Climate Data for Alstead New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.5 °F29.0 °F3.43 in.
February13.9 °F32.0 °F3.12 in.
March21.8 °F39.9 °F3.68 in.
April33.4 °F53.8 °F4.02 in.
May44.1 °F65.8 °F4.07 in.
June54.4 °F73.9 °F4.66 in.
July59.8 °F78.7 °F4.77 in.
August56.9 °F77.4 °F4.49 in.
September49.5 °F70.3 °F4.31 in.
October39.8 °F57.6 °F5.09 in.
November29.4 °F45.5 °F3.77 in.
December20.7 °F34.7 °F4.3 in.
Annual36.4 °F54.9 °F49.71 in.

Climate Data for Alstead New Hampshire

Average First Frost DateSep. 21 - Sep. 30
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