I'm presuming this will also have an impact on the relative humidity as well. Not the end of the world but it would have been nice if ProData had mentioned this on their product page so at least customers are aware.
Well, since I wrote our original WFL web page then you can blame me for that.

But I no longer maintain the page - someone else does that now, so cannot easily change the text. But I would make a couple of points:
First, the small degree of console warming that occurs with WFL also happens with any enhanced logger like WeatherlinkIP, Meteobridge Nano etc. The extra controller onboard such loggers and WiFi or network chips just unavoidably generates more heat than the very simple circuit of the serial/USB loggers. And heating also occurs of course if you use the backlight more than momentarily. The point being that it's not an issue that is unique to WFL.
Second, I've always regarded the inside temp/hum sensor as a slightly weak point of the console design. The sensor is buried inside the console and so is inevitably somewhat slow to respond to changes in room T/H and vulnerable to any heating effect from additional circuit components. Would have been much better in my view at least to have a socket on the console for an optional external T/H sensor. (Actually, from memory, the wireless Envoy does have such a socket.) But water long since under the bridge in respect of the 6312 console..