2013 Marine Layer Clouds


The table below shows the percentage of time that low clouds were present during daylight (8am-4pm PDT) hours at San Diego Lindbergh Field for the months May through September. Included in the table are values for the present year and climatological (based on 1960-2009 period) values. Values from 2009-2012 are also shown for comparison.

Values for 2013 will be updated as data becomes available.

Monthly Daytime Low Cloud Cover at San Diego Lindbergh Field for 2009-2013

MONTH CLIMATOLOGY 2009 2010 2011 2012 2013
MAY 32% 45% 18% 25% 29% 21%
JUN 37% 26% 47% 39% 44% 36%
JUL 29% 19% 58% 24% 29% 34%
AUG 25% 22% 19% 29% 22% 19%
SEP 23% 11% 23% 32% 11% 22%

The plot below shows the daytime low cloud fraction (1.0=100%) at San Diego Lindbergh for each individual day.

Present Year (2013) Low Cloudiness at San Diego Lindbergh
Low Clouds Only (Cloud Base < 2500 ft)
Red Line = Long-term Climatology


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