The day should be mainly dry with sunny intervals.
白天大部分时间应无雨，间有阳光。
The forecast said there would be sunny intervals and showers.
预报间晴，有阵雨。
There will be rain at first, with sunny spells later.
开始会有雨，雨后间晴。
Elsewhere, the weather today has been fairly sunny.
今天其他地方的天气都比较晴朗。
It will be hard to work today ─ specially when it's so warm and sunny outside.
今天无心工作——尤其是外面这样风和日丽。