climate (气候)指一个地方长期的较为固定的气候状态，包括阴晴、干湿、风雨等情况在内；而 weather(天气)则指某特定日子的天气情况。
1. climate的用例
He wants to move to a warmer climate. 他想搬到一个气候较温暖的地方去住。
Orange trees won’t grow in this climate. 在这样气候橘子树不能生长。
I can’t (couldn’t) imagine what it would be like to live in a hot climate. 我无法想像住在热带会怎么样。
2. weather的用例
We have fine weather today. 今天天气很好。
I hope the weather would be favourable. 我希望天气能变得有利。
The weather is horrible today. 今天天气糟糕极了。
Take warm clothes in case the weather is cold. 带些暖和衣裳以防天气转凉。
Weather permitting (= If the weather permits)，we’ll have an outing tomorrow. 如果天气允许我们明天将出去郊游。
The weather forecast is for probable showers. 天气预报说可能有阵雨。