I live in North Texas and it was 102 here today. Unless the air conditioner is way down a sheet is just right, so probably just the two layers would be enough.

I made one without any batting. It was EASY to quilt on my sewing machine and it is queen size. I seldom even use it but like it when making the bed.

Everything is hot to me right now. I also did a summer quilt with no batting and just quilted through the top and backing. It does not add the dimensional aspect, but it is just right on temperature.

A nice thin cotton batting is Cream white or Cream Rose. Just enough to give some texture but not enough to be warm. I like it better than flannel as it has just a bit of loft. It also drapes beautifully.

My summer quilt is white with big blue squares - it looks light and cool. But at night i turn it down and sleep under the sheet only.

I live in UK and at present we are having a heat wave we think. Getting up to 30 c ( 86) in midday. Toooooooohot for me. I am sleeping without any cover quilt goes on bed as I get out .

you might think I am crazy, but I'd go with a wool bat - incredible breathability - warm in winter and cool in summer. plus you can't beat the stitch definition you get with wool. I, too, live in Texas and use wool in all of my personal quilts. my internal temperature also runs very hot, but the wool works for me,

if you go with a cotton, you could always use a thinner loft, like quilter's dream (They have multiple lofts of cotton) or even use plain old muslin inside your quilt to give it some body, but not a lot of weight.

I wish I could get away with just a sheet - I mean, it's hotter than Hades outside, but my husband keeps the house at 72 degrees, which is a bit cool to me at night. I'll look for the quilters dream and the wool, as it's come up a couple of times and try them out.

Thanks!

Oh, if only. We're hovering around 95 to 103.

I've made two quilts for "summer". Just top and flannet sheet for backing. Still too warm but works for us. Had them both sent out for quilting and no issues for the long armer...just need to note...quilting will not be as pronounced since no batting.