Ayesha reported,

The Prophet ﷺ, whenever he saw clouds approaching from any horizon, would leave whatever he was doing, even if he was in prayer, to face them. He would say, "O Allah, we seek refuge in You from the evil of what has been sent with these clouds."If it rained, he would say, "O Allah, make it a beneficial downpour," repeating this two or three times. And if Allah dispersed the clouds without rain falling, he would praise Allah for that.

عن عائشة

أن النبي ﷺ كان إذا رأى سحابا مقبلا من أفق من الآفاق ترك ما هو فيه. وإن كان في صلاته حتى يستقبله: فيقول: اللهم إنا نعوذ بك من شر ما أرسل به فإن أمطر قال: اللهم سيبا نافعا مرتين أو ثلاثة-. وإن كشفه الله عز وجل ولم يمطر حمد الله على ذلك.