SAINT HELENA, CALIFORNIA

Period of Record General Climate Summary - Temperature

Station:(047643) SAINT HELENA
From Year=1931 To Year=2006
Monthly Averages Daily Extremes Monthly Extremes Max. Temp. Min. Temp.
Max. Min. Mean High Date Low Date Highest
Mean
Year Lowest
Mean
Year >=
90 F
<=
32 F
<=
32 F
<=
0 F
F F F F dd/yyyy
or
yyyymmdd
F dd/yyyy
or
yyyymmdd
F - F - # Days # Days # Days # Days
January 56.7 36.4 46.5 83 08/1962 16 09/1937 53.7 2003 37.8 1937 0.0 0.0 10.9 0.0
February 61.3 38.9 50.1 84 26/1932 22 02/1948 55.9 1963 44.8 1949 0.0 0.0 5.7 0.0
March 65.4 40.5 53.0 90 31/1966 24 03/1951 61.7 2004 47.4 1935 0.0 0.0 3.4 0.0
April 71.5 42.7 57.1 98 29/1981 27 08/1953 62.7 1987 47.4 1967 0.7 0.0 1.0 0.0
May 78.1 47.2 62.6 105 29/1950 30 23/1979 70.2 2001 55.5 1933 3.9 0.0 0.1 0.0
June 84.4 51.0 67.7 110 27/1976 36 12/1952 71.1 1993 63.5 1952 8.5 0.0 0.0 0.0
July 89.7 52.6 71.2 115 13/1972 39 05/1955 75.8 1996 68.3 1966 14.9 0.0 0.0 0.0
August 89.1 52.1 70.6 111 19/1950 32 09/1978 74.4 1981 67.0 1954 13.8 0.0 0.0 0.0
September 86.3 49.7 68.0 113 02/1955 35 28/1931 72.2 1997 63.2 1986 10.5 0.0 0.0 0.0
October 77.5 45.8 61.6 104 05/1933 23 29/1946 65.8 2001 57.5 1931 3.5 0.0 0.5 0.0
November 65.9 40.7 53.3 92 08/1955 23 23/1931 58.3 1995 47.7 1994 0.1 0.0 4.0 0.0
December 57.6 37.0 47.3 83 27/1967 11 11/1932 52.7 1958 41.2 1932 0.0 0.0 9.4 0.0
Annual 73.6 44.5 59.1 115 19720713 11 19321211 62.1 1997 56.8 1948 55.9 0.0 34.9 0.0
Winter 58.5 37.4 48.0 84 19320226 11 19321211 51.8 2003 42.0 1949 0.0 0.0 26.0 0.0
Spring 71.7 43.5 57.6 105 19500529 24 19510303 62.4 1997 53.0 1948 4.6 0.0 4.4 0.0
Summer 87.7 51.9 69.8 115 19720713 32 19780809 73.4 1996 68.0 1943 37.2 0.0 0.0 0.0
Fall 76.6 45.4 61.0 113 19550902 23 19311123 64.3 1995 57.0 1931 14.1 0.0 4.5 0.0
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