what does the moon with lines under it mean

The moon icon with lines under it most commonly appears in Apple's Weather app, where it represents a crescent moon combined with haze (not fog).

Weather App Context

This symbol shows up during nighttime forecasts to indicate hazy conditions alongside a crescent moon phase. Haze uses three horizontal lines (one slightly offset), distinguishing it from fog's two equal lines. Users often spot it in cold weather without visible mist, sparking forum debates.

"The proper inference is a Crescent Moon with haze, not fog. The symbol for haze has three lines one of which is offset." – Reddit user Mooze_guy

Apple's design keeps icons simple for quick glances, blending lunar phases with atmospheric effects like haze, dust, or smoke.

Forum Discussions

• Reddit threads from 2022–2024 frequently ask about this exact icon, confirming haze as the top explanation amid user confusion.

• Some guess moon phases alone (waxing/waning), but lines specifically signal weather overlays.

• Apple Discussions echo this: Similar sun-with-lines means daytime haze.

Other Interpretations

While less common, "moon with lines under" could reference:

• Emoji slang : 🌙 on Instagram signals "sus" or mysterious vibes in memes/DMs (trending 2025).

• Astronomy oddities : Rare sightings of lines across the moon (e.g., atmospheric effects or illusions) pop up in Reddit posts, but not "under."

• Astrocartography : Esoteric "Moon lines" map emotional energy on maps—no literal icon match.

TL;DR : In everyday apps like iPhone Weather, it's haze at night with a crescent moon—widely confirmed in forums since 2022.

Information gathered from public forums or data available on the internet and portrayed here.