Londonderry New Hampshire Climate Data

Monthly Average Climate Data for Londonderry New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.4 °F33.5 °F3.24 in.
February17.0 °F35.9 °F3.23 in.
March24.5 °F43.9 °F4.04 in.
April35.5 °F56.9 °F3.98 in.
May45.4 °F67.9 °F3.76 in.
June54.9 °F76.7 °F4.25 in.
July60.2 °F82.1 °F3.68 in.
August58.2 °F80.7 °F3.76 in.
September51.0 °F73.5 °F3.93 in.
October40.0 °F60.4 °F4.8 in.
November31.1 °F49.7 °F3.84 in.
December21.6 °F38.4 °F4.29 in.
Annual37.9 °F58.3 °F46.8 in.

Climate Data for Londonderry 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