Which statement best distinguishes weather from climate?

• A. Weather is long-term average patterns over decades.
• B. Weather is short-term atmospheric conditions; climate is long-term average patterns over decades.
• C. Weather occurs only near the equator.
• D. Weather is rainfall only; climate is temperature only.

Answer: (B)

Weather and climate differ mainly in time scale. Weather is the short-term state of the atmosphere at a location—temperature, humidity, precipitation, wind—over hours to days. Climate is the long-term behavior of those same variables, summarized as average patterns and variability over decades (typically 30 years or more). So a single hot spell or a rainstorm is weather, while the regular pattern of seasons and the typical range of temperatures and rainfall over many years define a region’s climate. This distinction is what the correct statement captures: weather is short-term conditions, climate is long-term averages over decades.