The best time for the soup is when it is cool enough for the soup and warm enough outside to open the door to let in fresh air.
Getting close to cooler weather and that means bean soup.
And it will be bad and it will linger.

One of my better ones, was when I let one go in a friends pickup in the evening, he went home and the next morning when he opens the pickups door, he calls me and said the vehicle still stinks.