UK: A risk or an increase in risk that attaches during only a part of the year.
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A risk that is present only during certain parts of the year. For example seasonal dwellings such as cottages used for vacations.
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A risk that only exists during a particular time of the year.
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A risk which is present only during certain parts of the year. Examples might be manufacturing concerns such as canners who have operations only during the summer and seasonal dwellings such as cottages used for vacations.