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Monthly F6 Reports

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.

Normal weather conditions for January 2005 to June 2011 utilize National Climatological Data Center (NCDC) 30 year means for the years 1971-2000. Normal weather conditions for July 2011 to the present utilize NCDC 30 year means for the years 1981-2010.

Values on any of these pages are subject to change without notice if errors are found by Mount Washington Observatory, the National Weather Service, or the NCDC.












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