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 weather in Negril, Jamaica, in November is pleasant, with an average temperature of 79 degrees Fahrenheit. The temperature generally does not drop below 73 F in the night, nor does it exceed 84 F during the day.