My shop is under the house (double brick) and doesn't seem to be subject to extremes...
In winter it seldom gets below 12°C which is not too cold for the nightie... seriously, my civies consist of shorts and a medium weight sports shirt which seem to be enough and if it really gets cold some short socks.  Winter is never an issue as I could put on some extra clothes if I had any (don't own any longs).  Also being an ex skier, I prefer the cold.
 
I hate the heat, but fortunately in summer, even the hottest days, it seldom get over 25°C in the workshop, which I tolerate and if needed call on my Ryobi air cannon,

that will operate from either a battery or mains.
If it tops 26°C I turn on my egg-nish-ner which is squirreled away in a corner...

I've only used it about 1/2 dozen times over the past 8 years, to the point that every time I need to use it I have to RTFM to operate it.

During extremes and if the opportunity arises, I occasionally move small jobs to my office... hence my dependence on my Mini Office Workbench.



If your first cut is too short... Take the second cut from the longer end... LBD