Brentwood New Hampshire Climate Data

Monthly Average Climate Data for Brentwood New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.0 °F33.6 °F3.33 in.
February16.6 °F36.4 °F3.23 in.
March24.4 °F44.0 °F4.24 in.
April34.4 °F56.7 °F4.22 in.
May44.5 °F67.4 °F3.79 in.
June54.2 °F76.6 °F4.15 in.
July59.8 °F82.1 °F3.6 in.
August58.1 °F80.9 °F3.58 in.
September50.4 °F73.5 °F3.88 in.
October38.9 °F61.1 °F4.81 in.
November30.1 °F49.7 °F3.77 in.
December21.6 °F38.8 °F4.37 in.
Annual37.3 °F58.4 °F46.97 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year