Hmm.
If you’re going to a really warm place, get yourself alot of bottles if you perspire. When you sweat you basically wash the pheromones away, so you’ll need to reapply. From my experience the neroli based ones disappear when you sweat. I like alcohol versions alot better than oils because the diffusion is much faster thus gives you faster hits, people inhale the pheros quick lol, whereas oils are alot more slower, I find oils great for layering with alcohol based pheros. With oils, the diffusion is slow, thus giving you lesser hits than with alcohol.
I’ve tried oil versions from a few other companies, and believe me, I had to use like 1/2-1/4 bottle to get a subtle to mild hit. Plus I tried one that smelled real nasty! I couldn’t cover the stank no matter what lol, I think it was the cops…Meh, waste of money imho. And this is coming from a person who has a really hot-temp bootie lol! I’m so “hot-blooded” lol I always complain about sweating and feeling super warm in most of my posts.
However, if you’re planning to get oil based ones, I’d trust androtics – haven’t tried any of their oils yet waiting for the lam to come back (but these people are psycho perfectionists, and I’ve read many fantastic reports on lam) And atleast it sounds something that I could cover.
For a warm weather, if you’re planning to use chocolatini, do give it time to dry down even if there’s no cops. Because, during the first few minutes, the notes are so sharp, I keep sneezing around the house lol after an 1/2hr, go out and it should smell buttery and soft. Chocolatini is an excellent diffuser, I once had this lady from the opposite side of the room come up and compliment me! 
Plus, I find that with chocolatini scents, I don’t need to reapply as often, the scent still lingers even when I perspire. Whereas, with neroli you really need to have a to-go with you to reapply, cause once you sweat, it’s gone. I love neroli though, it’s such a piece of cake to cover. Forgot to mention cookie too this scent is so yummy! Smells like cookie dough and vanilla on me but it’s more of a winter scent, too much for a hotter weather imho.
Grapefruit/coconut are both summer scents imo. I haven’t tried coconut cause in general I don’t like the smell of coconuts yech, but I have tried grapefruit and it smells like the real thing! The diffusion is pretty good too, when I’m really warm, it smells like nice fresh grapefruit! I can totally see this one as a summer scent!
So your pheros also depend on your scent choice for that particular weather.
Hmm, for a hotter weather…I would apply pheros to both my hair and skin. I don’t want to only use my hair cause too much alcohol for your hair is not healthy, so I’d use some on my skin too. C’mon you want guys to try smelling your neck too right? 
lol
If you plan on using pheros on your hair, remember, cops are a big no-no when it comes to hair. It will stink so bad! lol So if you decide to wear heavy copulin products that are 5X/20X/Lam/Eow they have to be applied to your skin.
You could wear stuff like instant shine, instant sexiness, mx135…etc. cause the scent really covers the pheromones well, plus you can’t detect the cops in is/a or mx135 per say at all
Condition your hair like crazy before using alcohol based perfumes cause
hot weather + alcohol = really bad dry hair/scalp. I might come out as gross, but I use heavy/ super greasy leave-in conditioner for a few hours before showering it off, and after showering, I would apply a hair moisturizer, and then use pheromones. That way your hair is happy and so are you and the men around you 
lol! Pheros last sooo much longer on your hair, usually until you shower it off.
For skin, I usually apply most to my wrists, lower arms and behind knees (if I’m wearing a skirt) cause I don’t usually perspire in those areas. Sometimes, I wouldn’t care about perspiring and apply to my shoulder blade, and neck when I wear a tank top, so the diffusion is crazy lol but you’ll need to reapply
