Answer:
The story is set in the fall. This is supported by the mention of the leaves on the trees turning dull and thin, the air feeling damp and thick, and the sun not being hot enough to burn off the dampness. These details suggest that the story is set in the transition from autumn to winter, as the leaves are falling off the trees and the weather is becoming more damp and chilly. There is no mention of the story being set in the countryside or in the United States, and there is no specific mention of the time of day.
Step-by-step explanation: