Unseasonably low temperatures are seriously affecting crop growth.
The water temperature in the Caribbean is unseasonably cool.
An unseasonably hot April was followed by record-breaking rain.
The sky over the city was deep blue, and it was unseasonally hot.
On an unseasonally sunny November afternoon, autumn sunshine is flooding through the big windows.
The number of flu infections is unseasonally low.
About three weeks ago we had an unseasonably fine weekend, which brought out a large volume of traffic.
It may occasionally be necessary to restrict routine admissions for a short period due to such things as unseasonably severe weather.
