'Summer' in the Bible

Now just as David happened to have passed the summit of the Mount of Olives, suddenly Mephibosheth's servant Ziba met him, accompanied by a couple of saddled donkeys loaded with 200 loaves of bread, 100 clusters of raisins, 100 pieces of summer fruit, and a skin of wine!

The king asked Ziba, "What are those for?" Ziba replied, "The donkeys are for the king's household to ride, the bread and summer fruit are for your young men to eat, and the wine is for whoever wants to drink if they get weary in the wilderness."