Brookline New Hampshire Climate Data

Monthly Average Climate Data for Brookline New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.2 °F33.7 °F3.48 in.
February15.8 °F36.6 °F3.28 in.
March24.0 °F44.5 °F4.07 in.
April34.7 °F57.6 °F4.07 in.
May45.7 °F68.7 °F3.81 in.
June55.1 °F77.6 °F4.42 in.
July60.5 °F83.0 °F3.9 in.
August58.5 °F81.3 °F3.85 in.
September50.7 °F73.9 °F4.08 in.
October38.8 °F61.1 °F4.92 in.
November29.6 °F49.7 °F3.9 in.
December20.7 °F39.0 °F4.43 in.
Annual37.4 °F58.9 °F48.21 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year