SONOMA, CALIFORNIA

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(048351)

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
1952 ----- z 26.00 l 26.00 b 31.00 27.00 31.00 b 42.00 a 38.00 b 37.00 33.00 24.00 29.00 24.00
1953 27.00 26.00 26.00 28.00 33.00 37.00 38.00 40.00 37.00 31.00 32.00 25.00 25.00
1954 21.00 29.00 26.00 30.00 35.00 36.00 39.00 40.00 37.00 31.00 25.00 24.00 21.00
1955 23.00 24.00 25.00 29.00 36.00 38.00 39.00 39.00 35.00 33.00 28.00 28.00 a 23.00
1956 25.00 25.00 29.00 31.00 37.00 40.00 45.00 43.00 39.00 30.00 28.00 22.00 22.00
1957 23.00 23.00 30.00 34.00 39.00 42.00 39.00 39.00 40.00 38.00 28.00 27.00 23.00
1958 27.00 30.00 28.00 33.00 36.00 45.00 45.00 47.00 40.00 38.00 e 25.00 30.00 25.00
1959 24.00 25.00 j 32.00 34.00 34.00 40.00 44.00 43.00 a 40.00 d 38.00 28.00 23.00 23.00
1960 20.00 j 28.00 b 30.00 a 31.00 33.00 43.00 43.00 43.00 37.00 33.00 30.00 25.00 20.00
1961 22.00 30.00 30.00 31.00 34.00 42.00 d 42.00 41.00 38.00 31.00 24.00 25.00 22.00
1962 22.00 28.00 28.00 33.00 35.00 39.00 43.00 42.00 40.00 38.00 30.00 22.00 22.00
1963 20.00 35.00 29.00 30.00 35.00 42.00 41.00 43.00 44.00 34.00 32.00 25.00 20.00
1964 28.00 28.00 28.00 28.00 30.00 39.00 42.00 43.00 39.00 36.00 24.00 24.00 24.00
1965 25.00 30.00 31.00 30.00 36.00 42.00 42.00 44.00 34.00 37.00 28.00 22.00 22.00
1966 24.00 26.00 24.00 33.00 37.00 36.00 42.00 43.00 41.00 31.00 27.00 25.00 24.00
1967 26.00 27.00 28.00 30.00 32.00 43.00 43.00 43.00 44.00 39.00 29.00 24.00 24.00
1968 22.00 31.00 32.00 30.00 33.00 40.00 42.00 44.00 40.00 34.00 30.00 20.00 20.00
1969 25.00 29.00 27.00 32.00 35.00 44.00 40.00 41.00 40.00 34.00 27.00 26.00 25.00
1970 23.00 31.00 31.00 29.00 35.00 41.00 41.00 40.00 35.00 30.00 33.00 25.00 23.00
1971 27.00 27.00 26.00 31.00 38.00 35.00 43.00 45.00 37.00 30.00 29.00 25.00 25.00
1972 22.00 27.00 29.00 33.00 38.00 39.00 43.00 41.00 36.00 33.00 31.00 17.00 17.00
1973 22.00 32.00 31.00 38.00 b 38.00 44.00 43.00 39.00 42.00 36.00 28.00 32.00 22.00
1974 28.00 28.00 a 30.00 33.00 33.00 41.00 44.00 46.00 43.00 37.00 28.00 25.00 25.00
1975 21.00 30.00 32.00 32.00 38.00 42.00 41.00 44.00 44.00 35.00 30.00 28.00 21.00
1976 22.00 25.00 25.00 27.00 35.00 34.00 42.00 43.00 42.00 35.00 26.00 24.00 22.00
1977 26.00 f 30.00 28.00 35.00 36.00 43.00 42.00 46.00 44.00 39.00 30.00 30.00 26.00
1978 35.00 e 35.00 39.00 36.00 40.00 42.00 45.00 a 46.00 44.00 40.00 b 26.00 22.00 22.00
1979 24.00 27.00 35.00 36.00 40.00 e 42.00 a 48.00 b 36.00 42.00 ----- z 30.00 27.00 a 24.00
1980 23.00 a 31.00 32.00 34.00 31.00 a 50.00 z 44.00 41.00 41.00 a 35.00 29.00 26.00 23.00
1981 30.00 31.00 35.00 34.00 35.00 49.00 43.00 46.00 40.00 36.00 32.00 b 33.00 30.00
1982 27.00 27.00 30.00 31.00 37.00 37.00 40.00 43.00 42.00 34.00 28.00 25.00 25.00
1983 29.00 32.00 34.00 30.00 33.00 45.00 43.00 46.00 43.00 42.00 32.00 31.00 29.00
1984 27.00 31.00 35.00 33.00 ----- z 42.00 41.00 47.00 41.00 31.00 30.00 26.00 26.00
1985 24.00 26.00 ----- z ----- z ----- z ----- z ----- z 38.00 38.00 31.00 22.00 19.00 19.00
1986 30.00 31.00 34.00 36.00 37.00 47.00 45.00 48.00 41.00 40.00 29.00 30.00 29.00
1987 26.00 28.00 30.00 39.00 43.00 44.00 45.00 48.00 44.00 40.00 29.00 26.00 26.00
1988 28.00 27.00 32.00 35.00 37.00 39.00 48.00 48.00 40.00 40.00 35.00 26.00 26.00
1989 28.00 20.00 33.00 35.00 40.00 43.00 44.00 48.00 46.00 36.00 29.00 27.00 20.00
1990 27.00 25.00 31.00 37.00 40.00 43.00 46.00 48.00 46.00 38.00 30.00 13.00 13.00
1991 21.00 32.00 33.00 34.00 37.00 42.00 47.00 45.00 46.00 35.00 32.00 a 28.00 21.00
1992 27.00 a 31.00 35.00 39.00 43.00 43.00 49.00 47.00 43.00 44.00 31.00 27.00 27.00
1993 25.00 30.00 36.00 37.00 43.00 42.00 47.00 46.00 a 41.00 42.00 25.00 27.00 25.00
1994 30.00 27.00 31.00 37.00 41.00 44.00 46.00 46.00 44.00 36.00 28.00 26.00 26.00
1995 31.00 29.00 33.00 34.00 42.00 43.00 49.00 45.00 46.00 37.00 36.00 33.00 29.00
1996 34.00 27.00 33.00 36.00 37.00 43.00 a 47.00 46.00 44.00 35.00 35.00 29.00 27.00
1997 24.00 32.00 30.00 35.00 40.00 47.00 48.00 50.00 47.00 40.00 38.00 27.00 24.00
1998 29.00 30.00 32.00 34.00 38.00 45.00 48.00 46.00 47.00 38.00 33.00 20.00 20.00
1999 27.00 a 29.00 32.00 31.00 39.00 40.00 46.00 46.00 46.00 37.00 35.00 a 30.00 b 27.00
2000 28.00 a 32.00 34.00 39.00 40.00 44.00 47.00 48.00 45.00 39.00 28.00 b 30.00 a 28.00
2001 27.00 a 29.00 34.00 33.00 43.00 44.00 49.00 45.00 46.00 a 41.00 35.00 a 35.00 a 27.00
2002 25.00 a 30.00 29.00 34.00 38.00 44.00 48.00 47.00 43.00 33.00 33.00 34.00 25.00
2003 35.00 27.00 34.00 34.00 38.00 44.00 45.00 49.00 46.00 37.00 28.00 26.00 a 26.00
2004 27.00 a 31.00 37.00 30.00 43.00 46.00 48.00 49.00 43.00 36.00 29.00 27.00 b 27.00
2005 31.00 36.00 35.00 33.00 33.00 44.00 49.00 46.00 42.00 41.00 30.00 29.00 a 29.00
2006 31.00 28.00 27.00 35.00 41.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 27.00
Period of Record Statistics
MEAN 26.13 28.87 30.85 33.09 36.92 41.65 44.06 44.15 41.52 36.00 29.46 26.13 24.07
S.D. 3.61 2.99 3.34 2.93 3.57 3.45 3.00 3.29 3.38 3.52 3.31 4.12 3.40
SKEW 0.52 -0.19 0.02 0.12 -0.22 -0.79 0.03 -0.45 -0.30 0.03 0.25 -0.46 -0.71
MAX 35.00 36.00 39.00 39.00 43.00 49.00 49.00 50.00 47.00 44.00 38.00 35.00 30.00
MIN 20.00 20.00 24.00 27.00 27.00 31.00 38.00 36.00 34.00 30.00 22.00 13.00 13.00
NO YRS 52 53 54 54 53 52 53 54 54 53 54 54 45