梅雨 (rainy season)

When I hung the laundry out during a break in the rainy season, it already felt like summer.

The seasonal rain front will become active starting tomorrow.

What should I do if the rainy season starts tomorrow?

It's not even the rainy season, so you don't need an umbrella, do you?

During the rainy season it rains so much that it's hard to plan outings.