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How to Read METAR and TAF Reports (Plain-English Guide)

If you've ever pulled up an aviation weather report and seen something like KJFK 221951Z 28014G22KT 10SM FEW250 24/12 A2992 and had no idea what you were looking at, you're not alone. METAR and TAF reports look like a wall of code, but once you know the pattern, they're actually one of the fastest ways to understand real weather conditions at an airport, faster than any app icon or five-day forecast.

Here's the plain-English version.

What Is a METAR?

METAR stands for Meteorological Aerodrome Report. It's a snapshot of current weather conditions at a specific airport, issued roughly once an hour (more often if conditions are changing fast). Pilots, dispatchers, and air traffic controllers rely on it because it's precise, standardized, and updated constantly: not a general regional forecast, but exactly what's happening at that one runway, right now.

What Is a TAF?

TAF stands for Terminal Aerodrome Forecast. Where a METAR tells you what's happening now, a TAF tells you what's expected over the next 24–30 hours at that same airport. Think of METAR as "right now" and TAF as "here's what to expect."

Breaking Down a METAR, Piece by Piece

Let's use this example:

KJFK: The airport's ICAO code (JFK International, in this case).

221951Z: The day and time of the report, in Zulu time (UTC). "22" is the day of the month, "1951Z" is 19:51 UTC. Aviation always uses Zulu time specifically to avoid confusion across time zones: a report issued at "2pm" means something different in every time zone, but 1951Z means exactly one moment, everywhere.

28014G22KT: Wind direction and speed. Wind is coming from 280 degrees at 14 knots, gusting to 22 knots.

10SM: Visibility: 10 statute miles.

FEW250: Cloud cover. "FEW" means few clouds, at 25,000 feet.

24/12: Temperature and dew point, in Celsius: 24°C temperature, 12°C dew point.

A2992: Altimeter setting: 29.92 inches of mercury.

Once you know the pattern, an entire METAR takes about ten seconds to read.

VFR, MVFR, IFR, and LIFR: What the Categories Actually Mean

Rather than reading every number every time, most pilots and dispatchers use a shorthand flight category, based mainly on visibility and cloud ceiling:

VFR Visual Flight Rules: Good visibility, high ceiling. Normal visual flying conditions.

MVFR Marginal VFR: Reduced visibility or lower ceiling. Still visual, but tighter margins.

IFR Instrument Flight Rules: Visibility or ceiling low enough that instrument flying is required.

LIFR Low IFR: very low visibility or ceiling, the most restrictive category.

These categories are usually color-coded (green for VFR, blue for MVFR, red for IFR, magenta for LIFR), which is why apps that show a color-coded badge next to an airport are genuinely useful: one glance tells you the category without reading a single number.

Reading a TAF

A TAF looks similar to a METAR but covers a time range instead of one moment, broken into segments as conditions are expected to change. Each segment restates wind, visibility, and cloud cover for that window, the same format as a METAR, so once you can read one, you can read the other.

Why This Still Matters, Even With Modern Apps

It's tempting to assume a nice weather icon in an app has already done this translation for you, and for a general sense of "is it going to rain," that's true. But METAR and TAF remain the actual, standardized source pilots and dispatchers check for a reason: they're precise, timestamped, and don't smooth anything over. A "partly cloudy" icon and an MVFR ceiling can describe two very different realities.

AvClock is reference and informational only, not for actual flight planning or navigation. Always use official sources (FAA, NOTAMs, charts, ATC) for that. But for a quick, accurate read on conditions at any airport worldwide, it's built for exactly this.