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. If you would like data from earlier than 2005, please use our data request form.
Mount Washington Observatory is a private, nonprofit, member-supported institution with a mission to advance understanding of the natural systems that create Earth’s weather and climate. It serves this mission by maintaining a weather station on the summit of Mount Washington, performing weather and climate research, conducting innovative science education programs, and interpreting the heritage of the Mount Washington region. Our weather station is located on the summit of Mount Washington in New Hampshire, at Mount Washington State Park.
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