Weather is defined as

• A. The annual variation that happens relative to the climatic average
• B. The total annual rainfall
• C. The average wind speed during growing season
• D. The number of frost days per year

Answer: (A)

Weather is the year-to-year variation in atmospheric conditions relative to the climatic average. In other words, it describes how a particular year differs from the long-term climate norm in aspects like temperature, rainfall, wind, and frost days. The climate provides the baseline, and weather is how conditions swing around that baseline from year to year. The other options focus on a single metric (like total rainfall, a specific wind measurement, or frost days) rather than the overall concept of weather as the variation around the climate average.