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.
Over the drier southwest portion, amounts vary from 45 to 55 inches. Snow is very light in the Big Horn Basin with annual averages from 15 to 20 inches over the lower portion and 30 to 40 inches on the sides of the Basin where elevations range from 5,000 to 6,000 feet.EMPERATURE. Because of its elevation, Wyoming has a relatively cool climate. Above the 6,000 feet level the temperature rarely exceeds 100 F. The warmest parts of the State are the lower portions of portions of the Big Horn Basin, the lower elevations of the central and northeast portions, and along the east border.