Mount Washington Weather Archives

The Mount Washington Regional Mesonet is a network of automated stations in and around the White Mountains that continuously collect weather data.

The following are our raw monthly data summaries (in PDF format) for each month of the year from 2005 to the present, as measured at the Mount Washington Observatory summit weather station.

The following tables provide the “normal” weather conditions on Mount Washington for each month, averaged over the period of 1991-2020. Also included are the extreme (record) conditions recorded during the station’s history, from 1933 to the present.