It's narrated by Imaam Muslim in his authentic compilation from the hadith of Anas, He said: It rained upon us as we were with the Messenger of Allah (may peace be upon him). The Messenger of Allah (pbuh) unveiled his garment (from a part of his body) until the rain fell on him. We said: Messenger of Allah, why did you do this? He said: Because it (the rainfall) has just come from the Exalted Lord.
~Prophetic Tradition (x)
It is raining as I type this. I've many memories of rainy days; in Melbourne, in all the cities I've travelled to. Today, at home, they come to me and nestle by my side.