I know you guys are proud of your 14er summits out west but nothing compares to Mt. Washington, NH when it comes to cold and wind. Average high temp on the summit is 33.9 degrees. Average low is 22.4 degrees.
Bull crap. Many locations out west are as windy, but much colder. Mt Washington is just the coldest place with a Official First Order Weather Station. SNOTEL sites and mountain radars are not official weather stations, though they do take weather data.
Mount Washington has an average annual temperature of 27.2F (which is slightly lower than the figure you posted, perhaps yours is a 30 year average). Its average wind speed is an impressive 35.3 MPH. Yes, it has a harsh climate.
Pikes Peak is colder, but not as windy. It has an annual temperature of 18.8F, but an average windspeed of 21.2 MPH, which is lower than that of Mt Washington. It could be argued that it has milder climate because of a lower wind speed, even though it is colder.
Longs Peak has wind statistics, but no temperature ones. It is safe to assume that Longs Peak is colder than Pikes Peak. For the period of record, it had an average wind speed of 34.3 MPH, about the same as Mt Washington. Even if you use the average Pikes Peak temperature data as equal, Longs Peak would have a harsher climate than Mt Washington, because it is about as windy, but much colder. Even though the weather station lasted a short time, Longs Peak clocked a 201 MPH wind. In all likelihood, it would have beaten this several times had the weather station lasted longer.
Mount Rainier is much colder and snowier than Mt Washington. Its annual temperature is 11.9. In fact its average high in July is 33F, colder than the average yearly high temp you post. I don't know of any wind data though, so maybe you could argue that Mt. Washington is windier (and it likely is). Much warmer too.
None of these peaks compare to the Alaska mountains though. On Denali, the annual temperature there is -28F and temperatures (without the windchill) on its slopes have dropped to -100F. The average temperature in July is much colder than the average January temperature on Mt Washington. It is almost certainly windier as well. Weather balloon data estimates an average annual wind speed of over 45 MPH.
So Mt Washington IS the coldest location in the US with both an observatory and a long term first order weather station. It is NOT however, the coldest location. Any claim otherwise is due to local pride and naivety.
Now, I have a debate to watch, so see you later.
I'm slow and fat. Unfortunately, those are my good qualities.