What temperature does Jet A fuel start to freeze?

Jet A fuel typically begins to freeze at approximately -40°C. This freezing point can vary slightly based on specific formulations, but -40°C is widely accepted as a standard threshold for Jet A fuel. Understanding this temperature is crucial for aviation operations, particularly in cold weather environments, as it impacts fuel handling, storage, and performance in aircraft.

Maintaining fuel above this freezing point is essential to prevent fuel lines and filters from becoming clogged with ice, which could disrupt engine performance. Aviation fuel specifications typically ensure that Jet A remains usable at very low temperatures to accommodate flight operations across various climates.