Sea level. Mean sea level (MSL) (abbreviated simply sea level) is an average level of the surface of one or more of Earth's oceans from which heights such as elevations may be measured.
Dates: September - October. Weather: Autumn in Wyoming is a delight. Many locations will see snow in mid-September, but it doesnât get to be real winter until late November. During October and November youâll discover a warm Indian Summer, with cool nights and beautiful changing colors. Early freezes in the fall are common.
In November winter weather sets in with 5 days of the month seeing snowfall. November, on average, will have 13 days below freezing. December and February see 10 days with snowfall each, with December seeing 22 days for the month when the mercury drops below freezing.