How to Read Weather Symbols: A Complete Guide to Forecast Icons
AnyWeather Editorial Team
Last updated: 2026-01-20
Based on public meteorological and environmental sources, plus AnyWeather data documentation.
Understanding Weather Symbols
Weather apps use symbols to communicate conditions at a glance. Understanding these icons helps you plan your day more effectively. Here's a comprehensive guide to common weather symbols.
Clear and Cloudy Conditions
- ☀️ Sun: Clear sky, predominantly sunny conditions
- 🌙 Moon: Clear night sky
- ⛅ Sun behind cloud: Partly cloudy (some clouds, some sun)
- ☁️ Cloud: Overcast or mostly cloudy
- 🌫️ Fog: Fog, mist, or low clouds reducing visibility
Precipitation Symbols
- 🌧️ Cloud with rain: Rain expected
- 🌧️🌧️ Two rain clouds: Heavy rain
- ⛈️ Thunder cloud: Thunderstorm with rain
- 🌨️ Cloud with snow: Snow expected
- 🌨️🌨️ Snow showers: Intermittent, localized snow
- 🌨️❄️ Sleet: Snow and rain mixed
- 🌧️⛈️ Rain and thunder: Showers and thunderstorms
- ☔ Umbrella: Rain possible, bring protection
Temperature and Condition Symbols
- ❄️ Snowflake: Cold temperatures, potential snow
- 🔥 Fire or thermometers: Hot weather warning
- 💨 Wind gusts: Strong winds expected
- 🌡️ Thermometer: Temperature indicator
Wind Direction
Wind direction shows where the wind is coming from, not where it's going to. An arrow pointing from west means westerly winds — winds coming from the west and blowing eastward.
UV Index Indicator
The UV index is often shown with sun intensity levels:
- Low UV: Safe for most skin types outdoors
- Moderate UV: Protection recommended
- High UV: Seek shade during midday hours
- Very High/Extreme UV: Extra protection essential
Reading the Full Forecast
Don't rely on symbols alone. Always check:
- Temperature range (high/low)
- Precipitation probability percentage
- Wind speed and direction
- Humidity levels
- Any weather alerts or warnings
A forecast showing "partly cloudy" with 60% precipitation chance likely means storms are possible — read beyond the main icon for the full picture.
Frequently Asked Questions
What do the common weather symbols mean?
The most common symbols are: a sun (clear), a cloud (cloudy/overcast), a sun behind a cloud (partly cloudy), a cloud with raindrops (rain), a cloud with snowflakes (snow), a lightning bolt (thunderstorm), and horizontal lines (fog or mist). A raindrop with a percentage shows the chance of precipitation.
What does a sun with lines underneath it mean?
Horizontal lines beneath a sun or a sun-and-cloud icon usually indicate fog or mist. The more lines shown, the lower the visibility — a useful heads-up for early-morning or nighttime driving.
How do you read wind direction on a weather symbol?
A wind arrow shows where the wind is coming FROM, not where it is going. An arrow pointing west means a west wind — air moving from the west toward the east. Barbs or short lines on the arrow indicate wind strength.
What does the percentage next to a rain symbol mean?
That is the probability of precipitation — the chance of measurable rain or snow during that period. For example, 40% means there is a 40% chance of precipitation; it does not indicate how heavy or how long the rain will be.
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