In a Jersey home, allow air to circulate beneath a shikibuton used on the floor after sleep. Check the floor at the same time and keep damp bedding out of closed storage. The right routine responds to the bedroom, as well as to the season outside.
Does the season change how I plan airing?
Jersey Met's published 1991–2020 averages show higher monthly rainfall in autumn and winter than in July. That is useful outdoor context when planning airing. It is not a measurement of your room, and it cannot tell us how long a particular futon takes to dry.
What if the room must be cleared early?
Set aside a ventilated position for the raised bedding before it goes into storage. Feel the contact side rather than judging only the top. Rainy weather may change where you air it, but it does not remove the need to let moisture escape.
Why check both surfaces?
Water vapour and perspiration can enter bedding during sleep. A solid base restricts airflow below, and condensation is possible when the contact surface is cool enough. Let the bedding and base dry before putting them together again. Slats can improve airflow, but do not guarantee a dry underside.
Climate reference: Government of Jersey: climate statistics and averaging period.