A cloud with a raindrop. A sun hiding behind a cloud. A wind symbol. Here's what each icon means and when to trust it vs. when to dig deeper.
Weather icons are designed to give you a quick glance at the forecast, but they’re also oversimplified on purpose. A single icon can’t capture “60% chance of rain, mostly in the afternoon, with a low wind component.”
So here’s what each common icon means, and more importantly, when you need to go deeper than the icon.
Clear/Sunny
Icon: A full sun, usually bright yellow/orange.
What it means: Clear skies, little to no clouds. This is the straightforward one.
When to dig deeper: Check the UV index if you’re outdoors for hours. Also check wind — a clear day with 35 mph gusts is very different from a calm, clear day. And clear nights are often colder than cloudy nights.
Partly Cloudy
Icon: A sun partially hidden by a cloud, or a cloud with sun peeking out.
What it means: Mix of clouds and sun. Could be 30% cloudy, could be 60% cloudy; the icon doesn’t distinguish. Expect some sun, some shade.
When to dig deeper: Check the hourly forecast. “Partly cloudy” could mean clouds in the morning with clearing afternoon (good for outdoor plans) or clearing morning that clouds over in the afternoon (bad timing for an evening event).
Mostly Cloudy / Overcast
Icon: More cloud than sun, or mostly gray.
What it means: Heavy cloud cover but probably no rain. Expect a gray day but dry conditions.
When to dig deeper: Check if there’s any precipitation probability. Also check the temperature — overcast days are often cooler than you’d expect, because high-altitude clouds can block solar heating.
Drizzle / Light Rain
Icon: A cloud with small raindrops or a light rain symbol.
What it means: Light, intermittent rain. Drizzle is technically rain where droplets are smaller and falling slowly.
When to dig deeper: Check the hourly forecast to see how long it lasts. Drizzle might be 20% of the day, concentrated at dawn. Also check visibility — if visibility is low, fog or mist might be bundled with the drizzle.
Rain / Moderate Rain
Icon: A cloud with medium-sized or bold raindrops.
What it means: Steady rain expected. Not a downpour, but consistent enough that outdoor plans are rained on.
When to dig deeper: Check precipitation amount (millimeters or inches) if available. This tells you if it’s a quick shower (0.25”) or all-day persistent rain (0.5”+ is heavy for a steady period). Also check wind — rain + strong wind makes it harder to use an umbrella.
Heavy Rain / Downpour
Icon: Cloud with large raindrops, often in bold or with lines indicating intensity.
What it means: Heavy rainfall expected. Flooding risk increases with heavy rain, especially in low-lying areas.
When to dig deeper: Check the hourly forecast to see if the heavy rain is concentrated or spread across hours. Also check whether flash-flooding warnings are active in your area. Never drive through standing water.
Thunderstorm
Icon: Cloud with lightning bolt, sometimes with rain.
What it means: Thunderstorms likely. Expect lightning, heavy rain, possible hail, strong wind, and brief but intense conditions.
When to dig deeper: Check the timing. A thunderstorm icon at 2pm means be inside or close to shelter by then. Check the severe-weather alerts — is it just a thunderstorm watch (conditions are favorable) or a warning (it’s actually happening)? A thunderstorm can last 20 minutes or 3 hours depending on the system.
Snow
Icon: Snowflake or cloud with snowflakes.
What it means: Snow expected. Could be light flurries, could be heavy accumulation — the icon doesn’t distinguish.
When to dig deeper: Check the accumulation forecast (if available) and the temperature. Wet snow at 32°F behaves very differently from dry snow at 0°F. Check whether winter-weather advisories or warnings are active. Also check road conditions from your department of transportation — they’ll have salt/treatment status.
Sleet / Freezing Rain
Icon: Often a raindrop with a snowflake, or rain/snow mix symbol.
What it means: Precipitation falling as ice. This is slippery and dangerous for driving.
When to dig deeper: Check the temperature profile. If it’s 32°F at the surface but warmer above, you get freezing rain (worst for power lines and ice buildup). If temperatures are below freezing all the way up, you get sleet (crunchy, less ice-buildup risk). Both are dangerous for driving — avoid it if possible.
Showers / Scattered Showers
Icon: Often a cloud with raindrops at different angles, or a partial-coverage version of rain.
What it means: Rain expected, but not continuous. You might get wet, then dry off, then get wet again.
How to use it: The hourly forecast is essential. If showers are 90% between 10am-12pm and 10% the rest of the day, your afternoon picnic is fine. If they’re scattered throughout, the timing matters less.
Hail
Icon: Cloud with ice pellets or bumpy raindrops.
What it means: Hail possible (ice pellets). Could be pea-sized (annoying) or golf-ball-sized (dangerous).
When to dig deeper: Check the severe-weather forecast for hail size. Golf-ball hail is a serious concern; pea-sized is an inconvenience. Check timing — if hail is expected afternoon and you’re driving in the morning, you’re probably fine. Also check the temperature; hail only forms in severe thunderstorms and requires specific atmospheric conditions, so it’s concentrated in time, not all-day.
Wind Symbol
Icon: Often an arrow or stylized wind lines.
What it means: Notable wind. Could be steady, could be gusts.
When to dig deeper: Check the sustained wind speed and gust forecast. 15 mph is breeze; 35+ mph affects outdoor events and driving.
Fog
Icon: Cloud at ground level, or horizontal lines suggesting low visibility.
What it means: Fog expected, reducing visibility.
When to dig deeper: Check the visibility forecast (if available) in miles. Sub-1-mile visibility is hazardous for driving; you need hazard lights and reduced speed.
Wind + Rain Combinations
Many forecasts show wind + rain icons together. This means both are expected, and they interact:
- Wind makes rain feel colder on exposed skin.
- Wind makes rain harder to shield from an umbrella.
- Gusts can destabilize umbrellas, tents, or light structures.
Check the specific wind speed and rain amount to assess how bad the combination is.
When to Trust the Icon vs. Read the Details
Trust the icon if:
- It’s clear/sunny — straightforward, enjoy it.
- It’s a thunderstorm — get ready to shelter, check alerts.
- It’s heavy rain/snow/hail — serious weather, follow alerts.
Always read details if:
- It’s partly cloudy (timing of clouds matters).
- It’s scattered showers (hourly timing is everything).
- It’s a mix (rain + wind, rain + low temp) — the details change what you should do.
- You’re planning something time-sensitive (outdoor event, long drive, hiking).
The Bigger Picture
Icons are a starting point, not the full forecast. They’re useful for a quick glance (“should I grab a jacket?”) but not for detailed planning. For that, check:
- The hourly forecast (shows timing)
- Precipitation amount (light shower vs. all-day rain)
- Wind speed and gusts (affects comfort and safety)
- Alerts (watches, warnings, advisories)
- Visibility and pressure (tells you what’s actually happening meteorologically)
A forecast is a picture made of many data points. The icon is the thumbnail. Read the full image before you commit to outdoor plans.
Check the detailed forecast for your location and practice reading all the details behind each icon.
Deepen your forecast skills:
- How to Read a Weather Forecast — understand precipitation %, wind, UV, dew point, and all those numbers
- Storm Safety: What Actually Works — when a thunderstorm icon appears, here’s what actually keeps you safe
- Severe Weather Preparedness Plan — use these icons to time your preparation
- Understand Weather Alert Types — know the difference between watch and warning icons