Which regulation requires pilots to assess weather conditions before flight?

FAR 91.103 is the regulation that requires pilots to assess weather conditions before flight. This regulation emphasizes the pilot's responsibility to be familiar with information concerning the flight, including weather reports, forecasts, and any other factors that might affect safety. Prior to flight, pilots must obtain and review this weather information to make informed decisions about the flight, ensuring they can take appropriate action in case of adverse conditions.

This regulation reinforces the importance of situational awareness and safety in aviation operations. By mandating pilots to check for weather conditions, it helps mitigate the risks associated with flying in challenging or hazardous weather, thereby promoting overall flight safety. Understanding and adhering to this regulation is crucial for responsible flight planning and execution.