It's a cloud day today.

今天是个多云天。

youdao

The day dawned sunless and with a low cloud base.

黎明时天气阴沉，云层压得很低。

《柯林斯英汉双解大词典》

Her father's illness cast a cloud over her wedding day.

她父亲的病给她的结婚喜庆日蒙上了一层阴影。

《牛津词典》

Coffin that passes through lanes and streets, Through day and night with the great cloud darkening the land.

VOA: special.2009.12.31

As the Flying Cloud sailed south, each day was extremely exciting.

VOA: special.2009.12.23

The skies above large parts of Europe were empty for a second day Friday, as air safety authorities warned that the cloud of ash from Iceland's volcano is spreading.

VOA: standard.2010.04.16

"He had just disappeared in a cloud one day, " said Mr Kitchen.

BBC: GPS plea to paragliders after Joel Kitchen Himalayas death

You'll be hot on the trail of tropical flora and fauna on an included half-day cloud forest safari.

BBC: Daily deal: An escape to the Panamanian cloud forest

The day the cloud died.

FORBES: The Day The Cloud Died