Note that the table showing all of the dates of the first measurable snowfalls
following Summer are listed below the graph
Average first snowfall is day 321, November 17
Year 2016 first snowfall in the Autumn was December 3, calendar day 338 (leap year)
Earliest first snowfall September 29
Latest first snowfall December 31
Years listed in red are Leap Years
*Calendar Day = the calendar day converted to the day of the year.
For example, first snow
December 3, 2008 (a Leap Year) = Calendar Day 338
All data in this table are from the National Weather Service and HPRCC data archives.