Data for our study we used from computer database in our Hospital. We analyzed one-year period. Climatic data we used from Meteorological station in Nis: temperature, pressure, moisture, wind, cloudiness and precipitation (rain, snow). We compared climatic factors in days when patients died and climatic factors in days without deaths in our hospital.

There were 108 died psychiatric patients during the year, average 2 per week. In 11 days there were two or three deaths. 270 days were without deaths. Minimum deaths were in spring (April and May: 4 per month), and maximum were in winter (December and January: 12 per month). Average age of died patients were 70 years old. After analyzing of climatic factors we concluded that quickly changes of weather conditions have a large influence on mortality of psychiatric patients, and only value of climatic factors don't have influence on mortality.