Yes, yes and yes.
(But I did have one good guy who said you hire and fire your own instructors meaning you get what you can from each one good or bad.)
Not here, that's for sure. Biggest temp swings I've seen in Los Angeles have been roughly 40°F (about 22°C) from one day's highs to the next.
Interacting about weather with SF members who use a different temperature scale has (finally) cemented the conversion formulas in your brain.
p.s. Thank you for that!
Did you know to calculate Celsius /centigrade to Fahrenheit give you a close approximation by doubling it and adding 30..?ergo.. 6 deg C..double it 12, plus 30 gives 52 F