The phrase "when the weather is nice" is notably the title and central theme of a 2020 South Korean television series called "When the Weather Is Fine" (also known as "I'll Go to You When the Weather is Nice"). This drama tells the story of a cellist who leaves her busy city life to return to a small town, where she reconnects with a former classmate and finds healing and love. The title symbolizes a metaphorical and literal setting for new beginnings and warmth after hardship, reflecting themes of forgiveness, healing, and love in a peaceful countryside environment.

If the inquiry refers more generally to the conditions or significance of "when the weather is nice," it typically means times when the weather is pleasant, comfortable, or favorable, often associated with outdoor activities and positive moods. However, the most prominent cultural reference is this Korean drama that beautifully explores life changes during nice weather.