Which statement best distinguishes weather from climate?

Which statement best distinguishes weather from climate?

• A. Weather describes climate normals; climate describes weather forecasts.
• B. Weather is the daily forecast; climate is the long-term average.
• C. Weather is short-term atmospheric conditions; climate is long-term average conditions over decades.
• D. Weather refers to humidity only.

Answer: (C)

Weather relates to the day-to-day state of the atmosphere—temperature, precipitation, wind, humidity, and cloud cover observed or expected over hours to a few days. Climate, by contrast, is a statistical picture of how those conditions behave over long periods, typically decades, capturing the usual patterns and how often extremes occur. This distinction in timescale is why the idea that weather is short-term conditions and climate is long-term averages over decades is the best description. For example, a single hot day is weather, while the typical warmth of a region over many years defines its climate.

Weather relates to the day-to-day state of the atmosphere—temperature, precipitation, wind, humidity, and cloud cover observed or expected over hours to a few days. Climate, by contrast, is a statistical picture of how those conditions behave over long periods, typically decades, capturing the usual patterns and how often extremes occur. This distinction in timescale is why the idea that weather is short-term conditions and climate is long-term averages over decades is the best description. For example, a single hot day is weather, while the typical warmth of a region over many years defines its climate.