It rains every afternoon from about 2pm, and it rains all afternoon.
Some days it just rains all day.
Ho Chi Minh City is not the most picturesque city in the rain. It's heavy on puddles, spontaneous floods, and large sheets of muddy water containing who-knows-what that fly up into one's face whenever a taxi drives past.
So much am I enjoying the constant rain that tomorrow I'm going to Hanoi to enjoy the floods that have hit there.