Grantham New Hampshire Climate Data

Monthly Average Climate Data for Grantham New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.3 °F27.0 °F3.08 in.
February9.5 °F30.3 °F2.69 in.
March18.4 °F38.8 °F3.26 in.
April31.1 °F52.4 °F3.52 in.
May42.6 °F65.2 °F3.66 in.
June51.8 °F73.4 °F4.45 in.
July56.5 °F78.0 °F4.4 in.
August54.6 °F76.6 °F3.99 in.
September47.5 °F69.3 °F3.84 in.
October36.5 °F56.3 °F5.23 in.
November26.9 °F43.8 °F3.56 in.
December16.4 °F32.6 °F3.88 in.
Annual33.3 °F53.6 °F45.56 in.

Climate Data for Grantham New Hampshire

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateJun. 11 - Jun. 20
Average Days With Frost150-180 Days
Plant Hardiness ZoneZone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year