October sees temperature averaging 36 degrees in Dubai, still very hot and humid by a good few degrees ‘cooler’ than the highs of August. As October progresses, temperatures start to gradually drop back down to more manageable levels.
Seeing any rain in October is still unlikely.
In the mountains the temperatures are a little lower and temperatures at night can be feel cold once the sun has set. The desert also can be very cold at night, so warm clothing is essential.