LOL at lined trousers, it was 35 degrees at 7.30am this morning when I took Dh to work.
Seriously bring the stuff that will last them if you think you will be going back in the winter. Otherwise shops are full of wool coats . Went to get DH some shorts yesterday, none anywhere except board shorts, and thats not really a good look for DH.
School uniforms include a jumper, generally because the AC is freezing.
Wellie boots if you have space (but only if you really do have the space, like really really do) becuase it does run on the very odd occassion and all the kids (big and small) run out to play in the rain. Some very littlies are confused as they have never seen rain. You can always pass on wellies. DS has one posh going out jumper and a hoodie (god forbid) for wearing to ski Dubai. I brought Ds walking boots but he has only worn then once despite having camped in the mountains on numerous occassions. So if the kids are growing out of them, dont bother you're not likely to get much wear out of them. Even the school trips to Dibba (they all go to the same place) dont need them. But, I hesitate here to say this, you will need crocs, you can get them here but all the kids wear them for the park, pool, beach etc.
You will need summer cardies, jumpers and wraps (you can get all that here if its not something you ever had in your wardrobe before.
Umm if you have anything posh bring it, because there are loads of balls, the Dubai World cup, brunches, dinners etc that all let you dress up as much or as little as you like.
DS has a few pairs of jeans for in the malls, it depends on how he feels shorts or jeans. Waterproofs as in a top will be ok, Ds has worn his for wind chill when sailing and for protection whenyou get sandblasted.
hth