SCIENCE

First-Ever Rainless January In San Francisco History

Feb 01, 2015 at 9:03 AM ET

January 2015 ended as the driest ever on record in San Francisco, with zero millimeters of rain recorded. According to data on GGWeather.com, in 1920, January produced 0.26 millimeters of rain; in 1976, there were only 0.33 millimeters; and the first month of 2013 yielded 0.49 millimeters. In 2014, only 0.06 millimeters of rain were recorded. Not one drop of measurable rain fell on city streets in January 2015.

This is the first time it’s happened since the California gold rush, when records started being kept. Still, even without a drop of rain in January, the greater Bay Area is officially above normal in rainfall for this time of year. It looks like the area will finally get some real rain Thursday evening or Friday, ending 43 consecutive days of dry weather—the city’s second-longest winter dry spell ever.

Monthly Historical Rainfall in San Francisco: