Grantham Wind Forecast
Grantham Wind Statistics
September Wind
Harrisburg, Capital City Airport (8.1 miles)
Strongest 1 September, 2025
9.2mph ENEAverage September
5.4mph
Climate (2010–Present)
Harrisburg, Capital City Airport (8.1 miles)
Strongest 14 April, 2024
59.9mph NNWAverage 2020–2025
6.7mph