Windham New Hampshire Climate Data

Monthly Average Climate Data for Windham New Hampshire

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.7 °C1.1 °C83.31 mm
February-8.7 °C2.7 °C83.31 mm
March-4.4 °C7 °C105.41 mm
April1.6 °C14.3 °C102.11 mm
May7.4 °C20.3 °C97.79 mm
June12.6 °C25.2 °C109.98 mm
July15.8 °C28.2 °C95.76 mm
August14.8 °C27.4 °C96.52 mm
September10.5 °C23.4 °C102.87 mm
October3.8 °C16.4 °C123.19 mm
November-1.2 °C10.1 °C99.06 mm
December-6.1 °C4.1 °C110.49 mm
Annual3 °C15 °C1209.8 mm

Climate Data for Windham 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 : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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