- unseasonable - not in keeping with (and usually undesirable for) the season; "a sudden unseasonable blizzard"; "unseasonable bright blue weather in November"
Antonym: seasonable
- ill-timed, ill timed, unseasonable, untimely, wrong - badly timed; "an ill-timed intervention"; "you think my intrusion unseasonable"; "an untimely remark"; "it was the wrong moment for a joke"
Antonym: opportune (indirect, via inopportune)