Vocalist Austin Williams recalled the writing of the song to Brum Notes Magazine: "We wrote it here in Robannas and it was just a jam," he said. "We'd been listening to a lot of psychedelic music and it was the last song we wrote before we went into the studio. There was never meant to be a chorus but we just kept on building it up because we were so happy with it. We might as well have put an orchestra on it – actually, that's something I want to do live at some point."
The song's music video was filmed by London born-and-based director and editor, Georgia Hudson, who'd been a major video contributor to i-D magazine before turning her attention to the music scene. The clip features a young couple falling in love in New York City. Hudson told NME: "There's nothing more interesting than the exchange between people. It's important to look at the essentials of relationships."
The romantic theme of this song was new territory for Williams. He told NME: "'She Changes the Weather' was the first love song I ever wrote, I think. I guess it's because it's the only time I ever really felt that need to and that want to, and I always was a bit skeptical about love songs because obviously LL Cool J's done them all."
This song began as a joke. Williams explained: "We had watched Spinal Tap the day before and just wanted to make a psychedelic jam."
Things turned serious fast when the song began to take shape. During rehearsal, bass player Cavan McCarthy said he "got really emotional" and had to take a time-out.
Williams on writing lyrics spontaneously: "Sometimes I write lyrics just on the cuff just when it comes out of your mouth, and sometimes it's just bulls--t... I sound like (Pogues singer) Shane MacGowan sometimes when I try to make up lyrics on the spot, but it worked out this time. And yeah sometimes the best lyrics, I think, are the ones that come out of your mouth at the time, unless they're really s--t and then you know right away, but sometimes the best ones are the ones that come out of your mouth straight away."