Objective: To investigate the relationship between climatic factors and daily numbers of completed suicide in the area of Split-Dalmatia County in the years 2011 to 2015. Subjects and methods: Retrospective analysis of all suicides between 1st of January 2011 and 31st of December 2015. Weather variables of interest were sunshine duration, atmospheric pressure, temperature, relative humidity, wind direction (Bura/Jugo) and wind speed. Data was collected on the weather station Split Marjan and compared on a day-to-day basis with daily number of suicides. Timelines for each variable were created and Pearson correlation coefficients were calculated to demonstrate possible associations. Calculations were repeated distinguishing between male and female suicides. To reduce seasonality, data on weather and suicides were differenced. Results: Positive weak correlation was found between sunshine duration and number of daily suicides (r=0.057; P=0.015) and conversely weak negative correlation between cloud coverage and number of daily suicides (r=-0.052; P=0.057). These associations were found in the whole sample as well as only in men. When comparing male to female suicides, these results were not reproducible in the female population. Conclusion: This study confirms the hypothesis that sunshine may facilitate suicide and conversely cloud coverage can be seen as protective factor. Associations with other climatic factors may be present but due to the complexity of the interaction between weather and human behaviour and health, difficult to demonstrate.