"Calm and Pleasant Weather" is an antonym for "cat-and-dog weather." Unlike the aggressive and unpredictable nature of "cat-and-dog weather," calm and pleasant weather is mild and enjoyable, creating a serene environment. Sunny and moderate temperature defines this weather, making it perfect for outdoor activities and relaxing. In contrast to the dampness of "cat-and-dog weather," calm weather lacks excessive rainfall or snowfall, which helps people move freely and enjoy a breath of fresh air. Therefore, calm and pleasant weather is an ideal antonym for "cat-and-dog weather," representing a harmonious and peaceful climate that refreshes the mind and soul.