<page_title> Rostov-on-Don </page_title> <section_title> Climate </section_title> <table> <cell> 643 (25.3) <col_header> Climate data for Rostov-on-Don </col_header> <col_header> Year </col_header> <row_header> Average precipitation mm (inches) </row_header> </cell> <cell> 72 <col_header> Climate data for Rostov-on-Don </col_header> <col_header> Year </col_header> <row_header> Average relative humidity (%) </row_header> </cell> </table>
Rostov-on-Don's mean annual precipitation is 643 millimeters (25.3 in) and the average air humidity is 72%.