Cloth masks, including homemade ones, are much better than nothing at all---any kind of physical barrier, even a cotton scarf, is helpful for reducing the transmission of the virus.
However, paper surgical masks are superior to cloth ones, as this figure sets out. What's more, my own experience is that paper surgical masks tend to feel lighter and more comfortable in hot weather. I also have no doubt that they would make face covering easier for at least some of the people who are finding it difficult or uncomfortable to wear a cloth mask.
The countries which have been most successful in combatting COVID19 are predominantly making use of surgical masks for the general public, more than homemade cloth ones. My own feeling is that if we are serious about wanting people to wear masks through the hot months of summer, it might be wise to ensure that people have supplies of paper masks as well, so that people at least have an alternative if they find cloth masks too uncomfortable, and have the option of switching things up a little.
There has been a lot of contradictory public dialog about masks during this pandemic. In the early days, people in most Western countries were being told not to wear masks because they should "leave them for the healthcare professionals." As time has gone on, the message has started to change to "Leave professional masks to the professionals, and make your own mask from cloth." It does seem that stigma still lingers around the idea of wearing surgical masks, based on a continuing sense that wearing such a mask is taking them away from healthcare workers.
However, the example of many Asian countries should suggest that it is not too hard to greatly ramp up the production of surgical masks. The Taiwanese government (as soon as it heard about an "interesting" new coronavirus in China) basically went straight to the mask manufacturers and said "We will offer you a big injection of cash to massively increase production. In return, you need to let us control half of what you make and create a rationing system." In Japan, we import most of our surgical masks from China----we now have too many of them and shopkeepers are complaining that they have all these boxes of masks out front and can't shift them.
Clearly there are ways to ramp up production. I'd suggest that it might be an idea to do this on a large scale before the weather starts getting hot.
FWIW, I am generally a huge advocate of reusable everything (use washable nappies, washable cleaning clothes, carry my own coffee bottle and water bottles everywhere), but make an exception for masks because I want to be both safe and comfortable in hot humid weather.