SNOW
CHRONOLOGICAL SUMMARY OF SNOWFALL IN SAN FRANCISCO
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.
NOTE: These are the dates of every measurable snowfall at the official observing site in San
Francisco. 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.
WIND
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
MEAN SPEED@
6.7 7.5 8.5 9.5 10.4 10.9 11.2 10.5 9.1 7.6 6.3 6.5 8.7
MEAN DIR@
N W W W W W W W W W W N
FASTEST MILE#
47 48 44 38 38 40 38 35 38 43 51 51 51
DIRECTION#
SE S S W W W W W N SE NE NE NE
1965 1917 1948 1965 1965 1965 1939 1929 1923 1950 1919 1923 1923
RELATIVE HUMIDITY
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
% RH$
04 PST
81 83 81 82 89 89 92 93 87 81 82 80 85
10 PST
72 70 61 59 65 70 73 73 64 62 69 71 67
16 PST
63 63 61 61 68 72 74 73 66 60 63 63 66
22 PST
76 76 76 80 86 88 90 90 82 74 76 74 81
BAROMETRIC PRESSURE
PRESSURE (Inch Hg)&
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
HIGHEST
30.62 30.62 30.64 30.48 30.35 30.38 30.28 30.29 30.26 30.39 30.51 30.61 30.64
1916 1916 1902 1902 1953 1902 1902 1902 1901 1921 1895 1901 1902
LOWEST
28.85 29.13 29.34 29.43 29.63 29.62 29.65 29.60 29.50 29.50 29.40 29.33 28.85
1916 1891 1906 1931 1941 1892 1926 1932 1927 1951 1952 1940 1916
SUNSHINE
(% POSSIBLE)*
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
MAXIMUM
79 95 88 95 86 94 88 90 94 91 92 85 80
1962 1964 1944 1968 1967 1919 1916 1969 1970 1912 1929 1956 1959
MINIMUM
18 25 32 43 43 50 46 46 46 43 27 32 56
1909 1902 1906 1948 1891 1948 1914 1917 1973 1952 1973 1949 1892
MEAN
56 62 69 74 72 73 66 66 72 71 62 45 67
NOTE: UNFORTUNATELY, THE ABOVE PARAMETERS ARE NO LONGER MEASURED IN SAN FRANCISCO. THEY ARE
PRESENTED HERE AS A MATTER OF INTEREST AND BECAUSE THEY ARE OF
CONSIDERABLE STATISTICAL USE.
@ 1890-1964 # 1912-1972 $ 1871-1972 & 1892-1958 * 1891-1974
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