Marlborough New Hampshire Climate Data

Monthly Average Climate Data for Marlborough New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.2 °F30.6 °F3.23 in.
February12.4 °F33.8 °F2.83 in.
March20.9 °F41.9 °F3.37 in.
April32.6 °F55.8 °F3.48 in.
May43.2 °F67.6 °F3.83 in.
June52.6 °F76.0 °F4.42 in.
July57.9 °F81.1 °F4.56 in.
August55.7 °F79.5 °F4.34 in.
September47.8 °F71.9 °F4.31 in.
October37.5 °F59.4 °F4.97 in.
November27.8 °F46.9 °F3.52 in.
December18.9 °F36.3 °F3.99 in.
Annual34.9 °F56.7 °F46.85 in.

Climate Data for Marlborough 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