SAINT HELENA, CALIFORNIA

Period of Record General Climate Summary - Precipitation

Station:(047643) SAINT HELENA
From Year=1931 To Year=2006
Precipitation Total Snowfall
Mean High Year Low Year 1 Day Max. >=
0.01 in.
>=
0.10 in.
>=
0.50 in.
>=
1.00 in.
Mean High Year
in. in. - in. - in. dd/yyyy
or
yyyymmdd
# Days # Days # Days # Days in. in. -
January 7.52 23.30 1995 0.48 1976 6.83 21/1967 12 9 5 3 0.1 4.0 1974
February 6.41 25.60 1986 0.07 1953 5.80 16/1986 11 8 4 2 0.0 0.0 1949
March 4.76 16.83 1995 0.34 1956 6.40 09/1995 10 7 3 1 0.1 4.0 1976
April 2.10 7.43 2003 0.00 2002 3.25 10/1982 6 4 1 0 0.0 0.0 1949
May 0.81 4.89 2005 0.00 1935 2.00 18/2005 4 2 1 0 0.0 0.0 1949
June 0.25 1.89 1967 0.00 1933 1.61 02/1967 1 1 0 0 0.0 0.0 1949
July 0.04 1.08 1974 0.00 1931 1.01 08/1974 0 0 0 0 0.0 0.0 1948
August 0.09 0.82 1965 0.00 1931 0.73 20/1997 1 0 0 0 0.0 0.0 1948
September 0.28 3.66 1959 0.00 1931 3.66 18/1959 1 1 0 0 0.0 0.0 1948
October 1.84 11.77 1962 0.00 1949 5.58 12/1962 4 3 1 1 0.0 0.0 1948
November 4.14 15.25 1973 0.00 1933 5.19 21/1977 8 6 3 1 0.0 0.0 1948
December 7.07 24.32 1955 0.00 1989 5.76 19/1955 11 8 4 2 0.0 1.8 1948
Annual 35.30 75.40 1983 10.41 1976 6.83 19670121 68 47 23 11 0.2 4.0 1974
Winter 21.00 47.17 1956 3.72 1976 6.83 19670121 33 25 13 7 0.2 4.0 1974
Spring 7.67 21.21 1995 1.71 1997 6.40 19950309 20 13 5 2 0.1 4.0 1976
Summer 0.37 1.89 1967 0.00 1933 1.61 19670602 2 1 0 0 0.0 0.0 1949
Fall 6.26 18.37 1973 0.15 1995 5.58 19621012 13 9 4 2 0.0 0.0 1948
Table updated on Jul 28, 2006
For monthly and annual means, thresholds, and sums:
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Seasons are climatological not calendar seasons
Winter = Dec., Jan., and Feb. Spring = Mar., Apr., and May
Summer = Jun., Jul., and Aug. Fall = Sep., Oct., and Nov.


Western Regional Climate Center, wrcc@dri.edu