The sun is present and warm. In fact, I would not be surprise if the island has a challenge with water. Many sections of the island has very low profile bushes and little tall trees, this confirms the island faces very little precipitation period in the summer. Bring sunscreen my friend.
Santorini is also a good place to see beautiful sunsets. Many will go to Oia, other will go the lighthouse but other options are available in between on the west side of the island to admire the sun going down in the horizon.