| > they indeed plan to base it on the wet bulb temperature WBGT != wet bulb : There's some nasty confusing terms here - and the Grauniad has also got the link wrong - their reporting has not just gotten more biased it has gotten much worse. WetBulbGlobeTemp = 0.7WetBulbTemp + 0.2DryTemp + 0.1*BlackPaintTemp In the shade with still air the WBGT approaches the actual temperature as humidity rises. If sunny and humid it can be above the actual temperature. For low-humidity moving air the WBGT might be noticeably cooler on a hot day. At least that's the best summary I can give from the quick skim I looked at. It's a crappy confusing 50s model supposed to approximate how warm it feels - needs a local meter to test - see image: https://en.wikipedia.org/wiki/Wet-bulb_globe_temperature I find dry bulb temperature along with humidity are better when I travel, because they are more predictable based on historical data and you get to know what matters and make choices according to context. And more helpful in cool climates where damp cool days are nasty. |