A Foggy Day

The lyrics describe someone feeling lonely and discouraged in an unfamiliar city, with no familiar people nearby. The mood changes suddenly when the speaker sees someone special: what seemed like a miserable day becomes the luckiest one they have known. The emotional movement is from self-pity and worry toward surprise, joy, and renewed hope.

Fog suggests more than London’s weather: it reflects the speaker’s low spirits and uncertain outlook. The phrase “the outlook was decidedly blue” uses “blue” to mean sad, while “had me low and had me down” expresses feeling unhappy. In contrast, “the sun was shining everywhere” suggests that meeting this person makes the whole world seem brighter, even though the weather may not have changed.

The ending says the sun was shining “upside-down,” an unexpected image that conveys how dramatically the speaker’s perspective has shifted. The lyrics do not explain who the person is or what kind of relationship they share, so the encounter could be romantic or simply deeply comforting. What matters is the sudden change in how the speaker experiences the day.