unseasonable in WordNet English dictionary

1. badly timed
   "an ill-timed intervention"; "you think my intrusion unseasonable"; "an untimely remark"; "it was the wrong moment for a joke"
   ill-timed  unseasonable  untimely  wrong 
   
2. not in keeping with (and usually undesirable for) the season
   "a sudden unseasonable blizzard"; "unseasonable bright blue weather in November"
   unseasonable