Some friends and I are looking to visit Yellowstone this Aug. The lodging we%26#39;re planning to book (in West Yellowstone) doesn%26#39;t have air conditioning. I really hate being hot at night, but it looks like the evening temps are in the high 30%26#39;s low 40%26#39;s? That should cool the room down quickly, if it%26#39;s accurate! Could someone who has been there in the past few years speak to their experience with the weather? Thanks!
August Temps, Air conditioning
Yes, it cools down quickly. Despite the vegetation due to altitude the air is seldom humid and the area basically arid. Dry air (and thin air) cools (and heats) faster - basically as in a desert. Once the sun goes down, especially if it is clear out, any daytime heat will radiate away pretty fast. If not clear then chances are the day did not heat up that much to begin with and there is likely a good breeze too. The muggy humid gulf air that invades the Midwest and makes for sleepless nights without A/C never makes it to Yellowstone. Air there comes from the Pacific and is wrung out over many rows of mountain ranges on the way.
Record high temps in August average around 82掳F with the worst ever 91掳 in 1969. Between 1971 and 2000 the highest August mean daily minimum temp was 44.5掳 - meaning the average of the highest overnight temp seen in each August in that period. The highest mean temp was 83.5掳. The absolute highest overnight low from 1924 to 2004 was 58掳 in 1968 and 1983. Data from: www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?mtwesy
So it is pretty much a slam dunk it will be comfortably cool (if not chilly) at some point every night. A good reason for lodging operators not to invest in A/C.
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