Caen is the best because it has decent summers and good annual precipitation. Its winters are too mild, but all of the places in this battle have winters that are either too mild or too cold/long.
"Perhaps some day in the dim future it will be possible to advance the computations faster than the weather advances and at a cost less than the saving to mankind due to the information gained. But that is a dream." -Lewis Fry Richardson in 1922
