The Metro Idex: Rain or Shine
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Wettest month in L.A. historically: January
Normal January rainfall in L.A. in Inches: 3.55
Inches of rain this January: 1:09
Years this century with no January rain: 3
Last time that occurred: 1976.
Rainfall since last July 1, In inches: 2.47
Inches of rain in the same period last year: 14.71
Percentage of L.A. water that originates elsewhere: 85%
Length in miles of Los Angeles Aqueduct from the Eastern Sierra: 338
Inches of fresh Sierra snow needed for an inch of L.A. water: 10 to 12.
Current water content of snowpack at Mammoth Mountain, in Inches: 17.6
Year that once- navigable Owens Lake went dry due to L.A. diversions: 1926.
Average number of clear January days in L.A.: 14.3
Average number of clear January days in San Francisco: 8.6
Average number of rainy January days in L.A.: 5.8
Average number of rainy January days in San Francisco: 10.7
Source: Los Angeles Department of Water and Power; “Weather of U.S. Cities”