Brookline New Hampshire Climate Data

Monthly Average Climate Data for Brookline New Hampshire

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.9 °C0.9 °C88.39 mm
February-9 °C2.6 °C83.31 mm
March-4.4 °C6.9 °C103.38 mm
April1.5 °C14.2 °C103.38 mm
May7.6 °C20.4 °C96.77 mm
June12.8 °C25.3 °C112.27 mm
July15.8 °C28.3 °C99.06 mm
August14.7 °C27.4 °C97.79 mm
September10.4 °C23.3 °C103.63 mm
October3.8 °C16.2 °C124.97 mm
November-1.3 °C9.8 °C99.06 mm
December-6.3 °C3.9 °C112.52 mm
Annual3 °C14.9 °C1224.53 mm

Climate Data for Brookline 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 5b : -26.1°C to -23.3°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year