It really depends on what you are used to. We are from the UK and visited relatives in North Africa in October, the weather to us was " a good summer" so my kids were dressed accordingly, all the locals were wearing woolies ! They thought I was mad, I thought they were mad ! LOL To me the weather is pretty warm now even in the evening I would be happy with my kids wearing say long sleeved shirt and longish shorts, not sure about after 10pm as we don't tend to stay out that late. Just use your judgement about what you are used to and try not to worry too much about everyone else.