Lower or higher temps mess with ph, and that begins to mess with micro/macro uptake along with microbe functions. 70f ensures ingoing water is brought up to temp sooner, speeding up water use. 70f will also lead to more evaporation of upper soil, which will then wick moisture from below, further reducing the chance of wet feet, or over watering. More moisture enters the air, also reducing the change of nute burn and heat stress. However that can slow down uptake and lead to over watering by being over zealous ''they must feed every 3 days because that's what the internet says''.
Similar applies to coco, consistent high or low pot temps in relation to opposite water temps mess with ph, however, since oxygen is more available, it isn't near as punishing until the extremes. It is why ingoing water temps during the winter are so important to keep above 65f, to reduce the impact of the above, slow growth and massive ph swings. I assume the reverse is true, constantly supplying cooler water to a sealed 85 ambient room maintains a root temp balance. Some people use the ph swing in their favour, but you have to use a consistent water temp and a consistent room temp to start seeing any level of consistency.
I don't track that stuff so much in the summer, but I track it like a mad man in the winter, low ingoing water temps and sub 70f root zone temps will even get you wet feet and over watering in coco, it's the only way I've ever seen it happen.
Most people will have indirectly noticed the above with pots near a cool air in-take. That is why they never get as big, cold roots, and why you should never have cool intakes pointing toward pots.
