Uneven precipitation (image) National Center for Atmospheric Research/University Corporation for Atmospheric Research Share Print E-Mail Caption An analysis of rainfall measured at weather stations across the globe between 1999 and 2014 found that the median time it took for half of a year's precipitation to fall was just 12 days. A quarter of annual precipitation fell in just six days, and three-quarters fell in 27 days. Credit ©UCAR. Image: Simmi Sinha. Usage Restrictions This image is freely available for media & nonprofit use. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.