2 sentences

1. 窗外下着蒙蒙细雨。

   chuāng wài xià zhe méng​méng xì​yǔ.

   A misty drizzle is falling outside.

   Source: Dong Chinese Dictionary

2. 窗外细雨蒙蒙，整个城市都笼罩在烟雨之中。

   chuāng wài xì​yǔ méng​méng, zhěng gè chéng​shì dōu lǒng​zhào zài yān​yǔ zhī​zhōng.

   The drizzle was falling outside, and the entire city was shrouded in misty rain.

   Source: Dong Chinese Dictionary