[link to original on tumblr]
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In any case, these lines are fairly similar to some in "Maybe after He’s Gone," which - like "You'll Go from Me" - was written by Chris White. The last verse is: "I feel so cold; I'm on my own / As the night folds in around me / Night surrounds me; I'm alone."
The situations are the same: night is surrounding the speaker/singer, but there's a difference in temperature. In "You'll Go from Me" and "Don't Go Away" (the lyrics are the same; I think it's only the structure that's different), it's "the warmth of the night" because the speaker/singer is with a girl who loves him, but the speaker/singer in "Maybe after He's Gone" is "so cold" because he's alone.