National Geographic : 1911 Feb
A VIEW OE THE PEDRO MIGUEL LOCKS (LOOKING NORTH FROM THE SOUTH END) TAKEN DURING AFLOOD: DECEMBER, 1910 The isthmus is not 50 miles wide where the canal cuts it, and yet the rainfall varies to an extraordinary degree inthis short distance. At La Boca, on the Pacific, the average fall recorded for 12 years is 69 inches per year, while at Bohio the average for 13years is130 inches per year, and at Christobal, on the Atlantic, 128 inches per year for a period of 38 years. The months ofJanuary, February, and March are practically rainless. In the seven months from May to November, inclusive, 85 per cent of the rainfall occurs.