形容词seasonable

1. not in keeping with (and usually undesirable for) the season

    e.g. a sudden unseasonable blizzard
           unseasonable bright blue weather in November

2. badly timed

    e.g. an ill-timed intervention
           you think my intrusion unseasonable
           an untimely remark
           it was the wrong moment for a joke

    Synonym: ill-timeduntimelywrong