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I water when the top 2" or so of the medium as bone dry.
If I stick a finger and its moist below I just water the surface. If its dry for the top half or so I water until I get a runoff.
I water at most every 2 days and I'm using coco\perlite (50\50) which hold WAY less water than soil. Its around 28°C in my grow room with a 20" industrial fan blowing on my SCROG at full speed.
In soil I used to water every 5-10 days.
If you need to water more than every 3 days you should transplant to a bigger pot unless your in the end of flowering and then you should know to use larger pots next time. (Or grow smaller plants)