“You can’t say that the weather might be poor because if it is cold and in the 40s then the distance runners will love it, I’m just saying that the uncertainty of it will make a difference,” he said.
“Sprinters obviously like warmer, drier weather so people who may run certain ways in those conditions may not run as well.
“I think what’s great is that about the United States is that we run in the spring. A lot of the Americans run in cold weather, in rainy weather, in windy weather, so I think that gives the Americans an advantage that other people may not have.”
However, Lewis did rubbish claims that British athletes would fold under the pressure of performing at home.
“It’s easier. People may think it is more pressure but I think it’s the opposite. More people can see you compete, you don’t have to travel, it’s closer to home and if there is more pressure it is entirely internal.
“I was at two Games at home and nobody I knew felt more pressure. Everyone said: ‘This is so much easier’.”