I was doing some online tests that are supposed to be useful for the TOEFL and I was confused (although I gave a correct answer) with the following multiple-choice question:
The meteorologists say we're likely to have a _____ winter.
Given answers are: calm, soft, mild, smooth.
The right answer was MILD but however long I searched the web and dictionaries, I couldn't find the difference between soft and mild speaking of weather. I saw both soft weather and mild weather as well as winter in particular.
Weather-wise, what is the difference between soft and mild?