What is the Weather API?

The Weather API includes METAR, TAF (Terminal Aerodrome/Area Forecast), and Zone Forecasts.

- METAR reports provide up-to-date information on current weather conditions at an airport; we enrich these reports with tag annotations identifying prevailing conditions and notable hazards that may impact aviation.

Our two forecast products, TAF and Zone Forecasts, are complementary in scope.

- TAF provides a detailed forecast for the immediate vicinity of an airport, generally covering a 9 to 12 hour window (sometimes greater).
- Zone Forecasts provide longer-term and more geographically broad outlook via day-by-day forecasts generally stretching up to about a week in the future.

Please see:

https://developer.cirium.com/apis/flightstats-apis/weather

Our weather data refreshes from every 10 minutes up to once per minute but the METAR reports are made available to us on a variable schedule. This varies by airport and by prevailing conditions. We have multiple redundant systems in different geographical locations that update independently from multiple data sources. So it is possible for some to have newer data than others. There may instances of latency due to upstream data provider issues.

Please note: For METAR and TAF data, the US national weather service only provides some coverage for international airports and no international coverage for Zone Forecast data.