They beat the Chargers in San Diego in perfect weather, they beat the Patriots at home in Indy under the dome ... perfect conditions. They play the Bears in the rain on Sunday ... the Bears defense will love it and their offense will get the job done.
Florida rains usually are brief... but voluminous. It will probably be enough to be a huge factor in the game, dagnabbit.
But your point was the the Colts couldn't handle the Bears "D". The rain will surely benefit the bears runnin ggame far more than it will help their defense.