Raindrops travelling down a window whilst you're sitting inside in the warmth, perfectly dry. Watching the world go by, in the rain. City lights sparkling against all the raindrops that trickle down the windowpane.
This makes me think of those dewey mornings that I wake up to in the Spring. A very perfect time to read because the window lighting is dreamy and perfect and the breeze through the cracked window is heavenly.