unseasonable

adjectives

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

"a sudden unseasonable blizzard"; "unseasonable bright blue weather in November"

unseasonable

is derived from

antonym

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

is derived from