How often is the Aviation Routine Weather Report (METAR) issued?

The Aviation Routine Weather Report, known as METAR, is issued every hour unless there are significant changes in the weather conditions that warrant an update. This regular schedule ensures that pilots and airline operations teams always have the most accurate and timely weather information available, which is crucial for flight safety and operational planning. When significant changes do occur, updates may be issued before the hourly cycle to inform stakeholders of developing weather conditions that could impact flight operations. Regular updates help maintain situational awareness and enable pilots to make informed decisions about their flights.