How about propagation delay by temperature? (device: EP2C35F484I8N)

Devices get slower as they heat up. With synchronous design practices and timing constraints, the fitter will try to fit your design so it meets timing under all PVT conditions(process, voltage and temperature), and TimeQuest will tell you whether it was successful or not. For asynchronous design(which could mean a lot of things), I can't say what will happen over PVT, just that delays will change.