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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.