1. A method of providing an approximate weather profile for an aircraft trajectory to a system configured to accept a number of weather data points for the aircraft trajectory, the method comprising: receiving the aircraft trajectory; extracting weather forecast data points along the received trajectory from a weather forecast database to form a subset of weather forecast data points; generating an approximated weather profile of the subset of weather forecast data points comprising a set of approximated data points unconstrained to the subset of weather forecast data points and having fewer data points than the subset of weather forecast data points and no more than the number of weather data points acceptable by the system; and providing the set of approximated data points to the system.