Sleep in the hot summer months can be difficult. Sleeping outside and near flowing water is the most comfortable setting one can find outside of air conditioning.
In Iraqi Kurdistan, there are plenty of hotels and although they are hard to find in any travel guide, anyone on the street will direct you to a nearby place. There's no shortage in Zakho, Dohuk or Arbil. Rates run about 15 USD to 25 USD per night for a single room with bathroom.