Analysis of a possible sun-weather correlation

In an attempt to verify the relationship between solar activity and precipitation posited by Xanthakis (1973), annual precipitation records from 2,548 stations in both hemispheres from the period 1850 to 1973 were examined. The strong negative correlation between solar activity and rainfall in the 60 to 70 deg N latitude belt found by Xanthakis appeared much less distinct in the present study. In addition, a spectral analysis indicated no significant spectral peaks having periods between 6 and 20 years, a finding which cast further doubt on the solar cycle-precipitation correlation.