Yellowstone Expeditions

Phases of the Moon for 2017 - 2018


The following chart indicates the percentage of the moon that will be illuminated on any given day during the winter season. Plan your trip to take advantage of the phase of the moon...Why not ski to the Canyon Rim under a full moon or if you prefer, star gaze at millions of stars under a new moon.

Moon data is from the US Naval Observatory at US Naval Observatory

Phases of the Moon for the 2017 / 2018 Winter Season