The authors reviewed the estimated suicide rates for the Region Metropolitan, the main socio-political center in Chile, for the period 1979-1994, in order to determine whether they follow a seasonal pattern. 5386 suicides were analyzed. While the “warm” months (October, November, December, & January) concentrated 39% of cases, the so called “cold” months reported 28.7%. This contrast was made even clearer by a month-to-month analysis, showing the highest suicide rate in December (10.6%) against the lowest rate in June (7%). (23 refs)