CLIMATE OF SAN FRANCISCO RAINFALL RETURN PERIODS

Chronological List

Year	Day		Amount		Remarks

1856	Dec 25		2.5"
1868	Jan 12		2.0"
1882	Dec 31		3.5"		Snow fell from 11:30am to 4:20pm.
1884	Feb 7		1.5"		Snow fell off and on during the day.  Depths from 1 to 2".        
1887	Feb 5		3.7"		Snow fell during the day. Up to 7" of Twin Peaks.
1888	Jan 16		0.1"
1896	Mar 3		1.0"		Fell as brief heavy snow at night.
1932	Dec 11		0.8"
1952	Jan 15		0.3"
1962	Jan 21				Unofficial 3" in Sunset and Westlake Districts
1976	Feb 5		1.0"		Up to 5" at top of Twin Peaks.

* Official snowfall observations were taken by the Weather Bureau from 1890 through 1964. Other dates have been complied from a variety of sources believed reliable by the author.

^# Trace amounts have been reported on other dates, however many of these were not true snow occurrences but rather small hail, associated with wintertime convective showers.

Also see San Francisco Snowstorms by Mark Mclaughlin