CNN有一篇分析报道，说特朗普分不清气候（climate）和天气（weather）。

见：

ANALYSIS: Trump can't distinguish climate and weatherDonald Trump doesn't know the difference between climate and weather

http://edition.cnn.com/2017/12/28/politics/trump-climate-change-analysis/index.html

两者主要区别是：

Here's a brief primer on the difference between the two, via NASA: "Weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere 'behaves' over relatively long periods of time."

也可这样理解：

Weather reflects short-term conditions of the atmosphere while climate is the average daily weather for an extended period of time at a certain location.

见：

What is the difference between weather and climate?