I've seen a 12ºC temperature change since just this morning ... was sunrise a "cold" climate and afternoon a "hot" climate, then back to a "cold" climate overnight? ... all in one day? ... are sunny days a completely different climate than cloudy days? ...
Temperature is just one parameter, what has pressure done these past half million years, how about humidity, winds, precipatation ... all the same in this time period you say? ... then climate hasn't changed, it's cold because we're heading into winter is all ... I promise it will be warm again next summer ... ask my house cat, I've never lied about that ...
I'm not saying Köppen System is any good, or the best, just that I'm basing my claim on it's workings and definitions ... "cold" is infra-type k, "the coldest month averages below 0ºC" ... "hot" is infra-type h, "the coldest month averages above 0ºC" ... clearly defined, widely published ... if this is unacceptable to you, then please state which system you're using and clearly state those definitions ... and if you don't use wind direction as your primary climate division, please state why ...
Continents are moving TEN TIMES faster than sea level is rising ... we should be more worried about Seattle crashing into Tokyo ... we can use the English Parliament Building as a boat mooring and do more good after all ... long live William V ...