How often are METAR reports typically updated?

METAR reports are typically updated every hour. This frequency allows pilots, meteorologists, and aviation personnel to have the most current weather information necessary for flight planning and safety. The hourly updates ensure that significant changes in weather conditions, such as visibility, wind speed and direction, temperature, and cloud cover, are promptly communicated to those who need it.

While there are scenarios where METARs can be issued more frequently, such as in rapidly changing weather conditions, the standard practice is to provide updates on an hourly basis. Other reporting frequencies, such as every 30 minutes or every 3 hours, do exist in specific circumstances or for different report types, but are not the norm for METARs. Additionally, daily updates would not provide the timely information necessary for flight operations, making hourly reports critical in maintaining aviation safety and situational awareness.