SAINT HELENA, CALIFORNIA

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(047643)

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1931 ----- z 39.11 i 41.03 40.47 49.90 51.17 49.48 47.29 42.93 41.97 36.63 35.10 43.60
1932 34.35 34.97 40.86 c 38.53 47.32 50.83 48.88 g 48.52 46.07 41.45 40.69 a 29.11 c 41.15
1933 31.90 32.54 41.45 38.37 41.50 a 45.40 48.26 50.10 44.90 44.81 37.37 39.03 41.30
1934 39.13 40.64 44.29 42.50 45.81 49.30 48.52 49.77 44.53 46.06 43.20 36.03 44.15
1935 35.32 37.46 35.13 44.30 44.81 48.63 48.61 48.42 48.53 42.55 36.37 34.84 42.08
1936 39.10 40.10 40.16 42.62 a 48.58 52.67 50.45 50.58 45.50 42.61 33.20 32.00 43.13
1937 29.32 36.68 42.74 40.27 45.48 49.87 52.58 50.45 46.90 45.26 42.97 38.48 43.42
1938 37.03 40.21 40.55 41.73 46.13 49.53 50.61 47.29 47.70 44.32 35.17 37.94 43.18
1939 33.42 33.89 40.35 42.73 46.00 46.67 49.90 48.42 48.80 40.61 33.93 38.77 41.96
1940 40.19 42.59 41.52 43.43 47.71 51.33 49.26 50.84 48.03 43.97 38.63 39.03 44.71
1941 39.74 42.14 41.26 41.53 48.61 48.67 53.39 51.84 46.37 42.61 41.93 39.26 44.78
1942 37.42 37.46 35.77 43.20 43.94 48.20 51.90 50.58 45.43 43.03 38.63 38.65 42.85
1943 36.23 37.25 42.29 44.33 47.13 47.30 50.97 49.32 48.20 43.58 38.33 37.29 43.52
1944 35.13 37.10 37.65 40.13 45.48 49.53 51.65 48.87 46.73 44.42 40.47 38.19 42.95
1945 34.71 38.32 35.32 40.93 46.57 a 49.20 52.19 49.32 47.67 48.55 41.30 39.03 43.59
1946 33.48 32.96 b 38.42 40.23 45.48 47.30 52.23 50.29 46.67 41.71 38.77 38.19 42.14
1947 28.74 40.00 43.23 43.40 48.03 52.07 50.19 50.77 46.97 47.94 37.83 33.35 43.54
1948 35.87 34.24 35.48 41.50 43.77 51.90 51.06 49.87 46.07 44.74 38.10 32.71 42.11
1949 27.87 34.96 41.61 41.77 47.19 48.60 49.77 49.03 49.57 40.77 41.50 33.29 42.16
1950 32.94 36.54 37.68 41.60 45.35 48.40 52.35 51.65 49.43 46.19 46.63 42.90 44.31
1951 37.84 37.57 37.52 43.13 47.68 50.00 51.06 51.26 49.40 44.81 42.47 36.19 44.08
1952 34.97 37.86 37.32 43.90 44.32 48.20 54.29 50.13 49.53 45.39 35.70 40.64 c 43.52
1953 41.84 37.46 37.84 40.38 a 43.39 48.43 51.16 51.32 53.10 43.48 44.47 36.71 j 44.81
1954 37.42 37.21 38.32 44.53 46.50 c 49.11 b 51.55 i 51.06 47.07 42.71 41.33 36.16 42.86
1955 32.77 33.31 b 36.19 37.50 45.81 48.60 51.08 g 48.71 c 47.30 43.81 39.40 42.10 41.41
1956 40.61 34.55 36.77 41.21 a 47.19 48.96 b 54.25 g 51.16 48.80 43.74 38.37 30.16 41.96
1957 30.62 b 41.96 41.77 43.24 a 49.14 b 52.96 b 52.39 49.74 49.90 46.83 a 38.50 37.03 44.51
1958 36.65 46.18 37.26 41.60 48.19 53.47 55.48 55.33 a 51.43 45.74 39.90 37.84 45.76
1959 39.65 35.69 o 40.32 c 44.23 45.65 k 50.93 a 52.48 52.52 b 50.83 49.88 f 35.80 33.00 44.42
1960 37.26 39.60 d 43.48 42.37 46.16 53.93 52.81 51.22 d 47.89 b 47.35 e 40.60 37.77 45.04
1961 36.62 e 40.29 40.54 g 41.20 45.71 52.14 i 53.39 c 53.97 49.00 44.78 d 38.40 35.97 43.93
1962 33.48 38.96 37.55 42.37 44.16 48.90 49.23 51.06 48.43 48.45 41.43 37.90 43.49
1963 30.71 44.79 37.13 40.57 48.74 50.37 50.94 52.29 52.03 48.84 41.30 34.23 44.33
1964 34.35 34.00 36.35 39.23 43.23 50.00 51.81 51.90 48.90 46.26 40.60 42.10 43.23
1965 37.77 35.96 39.74 44.57 43.94 49.80 50.65 53.55 46.37 45.00 43.57 32.68 43.63
1966 34.90 35.54 40.32 45.20 47.03 50.67 50.23 51.84 50.23 44.32 43.83 39.13 44.44
1967 37.03 36.93 38.48 37.10 45.26 52.17 53.19 52.68 52.33 46.81 43.70 35.23 44.24
1968 32.65 44.79 40.13 41.50 44.97 51.13 52.71 53.06 51.77 45.42 42.30 34.94 44.61
1969 35.68 37.46 37.03 39.87 48.87 53.20 52.06 50.16 50.30 46.23 38.00 40.52 44.11
1970 41.29 39.29 40.58 37.30 47.26 50.87 52.29 49.39 47.73 43.29 45.10 38.10 44.37
1971 36.61 35.57 37.68 39.87 45.52 48.57 51.81 53.00 48.33 40.45 37.73 33.58 42.39
1972 32.06 39.83 42.35 41.80 45.58 49.47 53.13 51.03 48.30 48.87 39.07 32.35 43.65
1973 35.35 41.93 38.03 41.90 47.29 51.53 51.13 49.45 51.30 45.55 43.97 40.39 44.82
1974 37.84 36.11 43.35 40.93 45.19 50.90 53.39 53.52 48.13 46.10 38.80 36.48 44.23
1975 33.06 39.96 41.23 38.50 47.35 50.03 51.65 53.03 49.67 45.45 37.10 35.42 43.54
1976 31.84 37.72 35.74 40.00 46.16 49.80 52.74 51.90 51.10 44.87 42.53 30.16 42.88
1977 32.94 37.14 36.23 42.43 43.77 52.70 51.61 54.81 51.57 46.55 39.43 38.48 43.97
1978 41.58 40.57 45.65 41.70 48.42 52.00 52.48 51.32 50.43 45.97 36.80 30.19 44.76
1979 35.52 36.07 a 41.61 40.47 46.55 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 40.04
1980 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 41.93 37.21 c 39.57
1981 ----- z 40.43 42.23 a 44.83 49.97 ----- z 53.06 59.10 54.27 44.84 46.43 42.62 b 47.78
1982 33.00 39.79 38.10 42.63 47.32 50.77 52.00 ----- z 50.13 46.39 37.70 36.45 43.12
1983 36.42 43.89 43.42 42.93 46.84 52.03 53.45 53.94 52.90 47.94 40.70 43.45 46.49
1984 43.62 b 38.86 43.06 42.27 50.29 51.00 55.55 52.90 ----- z 46.13 ----- z ----- z 47.08
1985 33.00 38.32 39.23 48.17 ----- z ----- z 56.71 52.32 51.43 47.35 39.20 33.77 43.95
1986 ----- z 44.75 ----- z 44.33 ----- z 53.53 53.71 54.00 48.77 48.71 40.67 35.90 47.15
1987 ----- z 39.39 41.06 45.77 51.07 a ----- z ----- z ----- z 50.73 ----- z ----- z ----- z 45.60
1988 ----- z ----- z ----- z 46.43 47.29 52.47 ----- z 54.26 50.47 48.45 43.93 36.97 47.53
1989 33.87 34.29 43.61 47.90 48.39 52.93 53.45 53.84 51.57 46.00 40.23 32.94 44.92
1990 35.68 35.46 41.71 47.90 ----- z 52.70 55.45 55.65 51.27 46.29 38.80 28.71 44.51
1991 35.00 40.57 40.81 43.20 46.71 50.07 ----- z 53.29 52.33 48.03 43.07 35.19 44.39
1992 33.26 43.31 44.16 47.07 52.45 53.50 55.77 ----- z 51.93 50.35 42.33 34.13 46.21
1993 36.52 39.04 46.32 45.17 50.65 55.33 54.58 55.10 50.63 49.13 38.70 35.48 46.39
1994 37.48 36.61 42.06 45.17 49.32 51.73 53.03 52.97 51.43 46.10 36.90 35.26 44.84
1995 45.61 44.93 43.35 44.50 49.39 52.57 56.29 53.94 52.53 47.48 44.40 42.23 48.10
1996 38.74 43.24 42.65 46.17 50.26 53.13 56.06 54.61 50.90 47.71 45.10 42.19 47.56
1997 41.61 40.89 43.35 47.43 51.65 54.07 55.52 56.42 55.30 48.39 44.73 37.16 48.04
1998 42.39 42.29 42.13 41.03 ----- z 53.67 ----- z 55.58 55.60 46.03 42.97 34.81 45.65
1999 36.52 38.36 39.97 43.76 a 46.74 51.27 53.29 55.43 a 53.00 47.66 b 46.23 ----- z 46.57
2000 42.40 a 44.14 43.03 a 47.15 c 51.34 b 54.67 53.73 a 54.45 53.62 a 48.39 39.80 39.42 47.68
2001 36.32 39.39 44.68 41.97 a 51.93 a 54.28 a 55.10 54.58 52.07 a 51.45 46.87 43.52 47.68
2002 38.29 41.11 41.48 46.60 47.23 54.47 55.13 54.10 50.97 47.84 44.50 42.35 47.00
2003 45.19 40.89 44.71 43.03 48.77 53.90 56.06 56.06 53.70 48.70 a 41.43 42.48 47.91
2004 41.13 41.52 h 47.61 46.70 49.52 53.39 g 55.68 56.26 53.92 e 49.00 43.67 40.03 48.35
2005 ----- z 44.07 45.65 43.90 50.61 53.57 57.16 53.94 50.53 48.35 45.37 42.45 48.69
2006 42.00 40.82 40.39 46.70 50.26 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 44.03
Period of Record Statistics
MEAN 36.39 38.92 40.52 42.73 47.23 50.95 52.59 52.09 49.70 45.79 40.66 36.95 44.36
S.D. 3.82 3.28 2.96 2.65 2.34 2.18 2.16 2.46 2.66 2.42 3.18 3.66 1.72
SKEW 0.23 0.17 0.02 0.11 0.12 -0.13 0.12 0.23 -0.10 -0.21 -0.03 -0.14 0.71
MAX 45.61 46.18 47.61 48.17 52.45 55.33 57.16 59.10 55.60 51.45 46.87 43.52 48.10
MIN 27.87 32.54 35.13 37.10 41.50 45.40 48.26 47.29 42.93 40.45 33.20 28.71 41.30
NO YRS 69 71 72 75 70 68 65 70 72 71 72 70 51