The chart is a little lacking in top end results as it could do with reading to about 45C but I guess a higher ambient than 30C is more often than not accompanied by a humidity over 50% anyway.. so your pretty limited to chilling possibilities. It wouldn't take long to cross reference it to Fahrenheit if you really wanted.. still makes much more sense to talk of anything water and temperature related in Celsius. 0C= frozen water (Ice) 100C = boiled water (Steam)
I do have an idea / plan to "solve" this condesation problem in my system. Yes I could insulate every block and tube, but those that know my system would realise how near impossibly hard this would be to do successfully. It would also cover all my blocks with ugly lagging.
What I plan is to make a custom PC case to roughly the dimensions of a large JCB rad I have. The case will be near air tight sealed other than all the base area and a chimney or collection of chimneys in the top made from copper. Each chimney will contain a light inside, (probably 12v halogen car fog light bulbs or similar).
With the large rad shown below, (that I'm currently using as a true rad for the system), laid flat in the base of the case, chilled coolant from an underground tank at between 8C to 12C would pass through this rad after its loop through all the blocks on its way back to the tank. With the heat-up of the chimneys there should be a small but significant drafting effect like a real chimney in a house when you have a log fire. This in theory should draw air through the base mounted rad cooling it and probably dehumidifying it enough so that the insides of the pc are significantly cooler than the ambient and as such keep the blocks and tubes condensation free... will it work? how well could it work?...only one way to find out and I'm working on it
Fahrenheit to Celsius Converter