Unseasonably means happening at a time when it's not typical or expected for that season. When the weather forecast says it will be unseasonably warm, you might wear shorts in February even though winter is supposed to be cold. Or you might experience unseasonably cool temperatures in July that make you grab a sweater when you'd normally be at the pool.

The word captures that odd feeling when nature doesn't follow its usual schedule. Cherry blossoms that appear unseasonably early might bloom in March instead of April. An unseasonably late frost might damage crops that farmers had already planted, thinking winter was safely over.

Notice that unseasonably always implies a comparison to what's normal. A 70-degree day isn't unseasonably warm in April, it's fairly typical. But that same temperature would be unseasonably warm in December or unseasonably cool in August. The word helps us express when something breaks the pattern we've come to expect from the calendar.