Thornton New Hampshire Climate Data

Monthly Average Climate Data for Thornton New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January9.1 °F27.3 °F3.48 in.
February10.4 °F29.8 °F3.12 in.
March19.4 °F37.9 °F3.47 in.
April31.3 °F51.4 °F4.21 in.
May42.9 °F64.7 °F4.4 in.
June51.8 °F72.6 °F4.62 in.
July56.6 °F77.2 °F4.98 in.
August55.3 °F75.7 °F4.61 in.
September47.8 °F68.2 °F4.35 in.
October36.8 °F55.2 °F5.61 in.
November27.4 °F43.0 °F3.97 in.
December17.1 °F32.7 °F4.62 in.
Annual33.8 °F53 °F51.44 in.

Climate Data for Thornton New Hampshire

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year