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.
The Snake River in northwest Wyoming eventually drains into the Columbia River and the Pacific Ocean, as does the Green River through the Colorado River Basin. Climate Wyoming has the second highest mean elevation in the United States at 6,700 feet above sea level. The climate is semiarid, but because of its topographical diversity, it is also varied. Annual precipitation varies from as little as five inches to as much as 45 inches a year, some in the form of rain and some in snow.