You do get days in rural France when it is grey. Not just normal grey but all pervading, blanketing, noiseless, still, depressing grey.
One of the things I really like about this part of France is the stillness. When some years ago I was working and stress was part of my life I valued a break in France particularly for the peace and absolute quiet.
However on a grey day that peace acts to accentuate the grey. There is no wind there is a light rain, the sky is uniform and grey.
The camera does lie, it makes it look less grey than it actually is.
France does grey better than anywhere else I know.