Somersworth New Hampshire Climate Data

Monthly Average Climate Data for Somersworth New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.4 °F32.5 °F3.29 in.
February15.9 °F35.2 °F3.25 in.
March24.3 °F42.8 °F4.12 in.
April34.5 °F55.6 °F4.26 in.
May44.7 °F66.3 °F3.6 in.
June54.2 °F75.7 °F4.07 in.
July59.8 °F81.3 °F3.67 in.
August58.3 °F80.2 °F3.45 in.
September50.6 °F72.9 °F3.57 in.
October39.5 °F60.3 °F4.76 in.
November30.3 °F48.7 °F3.85 in.
December21.2 °F37.8 °F4.36 in.
Annual37.3 °F57.4 °F46.25 in.

Climate Data for Somersworth 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