For me, my taste for tea depends on my mood rather than the weather. I tend to do all my tea drinking indoors, where it is nice and cool and comfortable with the air conditioning and a fan going. Right now I prefer the heavy traditional HK pu erh in the morning and a light shou mei at night, with some cooling chrysanthemum in the day time.
I've noticed Hong Kong people often drink pu erh with chrysanthemum, and the last time I went for yum cha with two of my Vietnamese-Chinese friends who were visiting from California, that's what we had. After pairing some delicate chrysanthemum buds I 'borrowed' from my brother with pu erh I'd been drinking straight, I realized the chrysanthemum almost entirely overpowers the subtleties of the pu erh. Definitely not for me, although with commercial 'dim sum' pu erh, covering up the subtleties may be a good thing!