Brentwood New Hampshire Climate Data

Monthly Average Climate Data for Brentwood New Hampshire

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.4 °C0.9 °C84.58 mm
February-8.6 °C2.4 °C82.04 mm
March-4.2 °C6.7 °C107.7 mm
April1.3 °C13.7 °C107.19 mm
May6.9 °C19.7 °C96.27 mm
June12.3 °C24.8 °C105.41 mm
July15.4 °C27.8 °C91.44 mm
August14.5 °C27.2 °C90.93 mm
September10.2 °C23.1 °C98.55 mm
October3.8 °C16.2 °C122.17 mm
November-1.1 °C9.8 °C95.76 mm
December-5.8 °C3.8 °C111 mm
Annual2.9 °C14.7 °C1193.04 mm

Climate Data for Brentwood New Hampshire

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year