MOUNT DIABLO JUNCTION, CALIFORNIA

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(045915)

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 ----- z ----- z 36.00 39.00 39.00 42.00 46.00 45.00 45.00 31.00 30.00 30.00
1953 35.00 33.00 29.00 30.00 37.00 40.00 44.00 45.00 46.00 43.00 29.00 31.00 29.00
1954 30.00 32.00 31.00 36.00 37.00 40.00 46.00 44.00 43.00 36.00 34.00 31.00 30.00
1955 31.00 28.00 32.00 31.00 38.00 39.00 34.00 48.00 43.00 43.00 31.00 30.00 28.00
1956 34.00 19.00 25.00 33.00 36.00 41.00 43.00 42.00 46.00 36.00 34.00 31.00 19.00
1957 20.00 30.00 a 32.00 31.00 40.00 41.00 46.00 46.00 49.00 43.00 31.00 32.00 20.00
1958 37.00 36.00 25.00 35.00 40.00 42.00 ----- z 60.00 44.00 36.00 30.00 39.00 25.00
1959 33.00 30.00 36.00 40.00 35.00 43.00 49.00 47.00 37.00 38.00 41.00 29.00 29.00
1960 24.00 33.00 35.00 29.00 34.00 45.00 45.00 43.00 42.00 43.00 32.00 32.00 24.00
1961 34.00 33.00 31.00 32.00 39.00 41.00 a 46.00 a 49.00 a 42.00 38.00 33.00 31.00 31.00
1962 18.00 22.00 31.00 35.00 a 38.00 42.00 43.00 42.00 41.00 41.00 36.00 29.00 18.00
1963 24.00 41.00 29.00 30.00 37.00 43.00 45.00 47.00 49.00 39.00 34.00 32.00 24.00
1964 31.00 33.00 31.00 31.00 32.00 40.00 45.00 46.00 44.00 43.00 31.00 28.00 28.00
1965 28.00 36.00 32.00 32.00 34.00 a 41.00 46.00 50.00 41.00 a 41.00 36.00 30.00 28.00
1966 29.00 31.00 28.00 38.00 39.00 40.00 46.00 47.00 45.00 42.00 33.00 34.00 28.00
1967 32.00 31.00 31.00 31.00 35.00 41.00 58.00 60.00 48.00 44.00 32.00 22.00 22.00
1968 29.00 37.00 36.00 33.00 38.00 43.00 48.00 48.00 44.00 40.00 33.00 27.00 27.00
1969 25.00 31.00 32.00 34.00 a 37.00 f 44.00 47.00 50.00 48.00 43.00 a 41.00 34.00 25.00
1970 33.00 35.00 33.00 31.00 38.00 41.00 46.00 47.00 44.00 40.00 37.00 31.00 31.00
1971 29.00 29.00 30.00 31.00 38.00 40.00 49.00 49.00 40.00 31.00 36.00 30.00 29.00
1972 26.00 32.00 33.00 31.00 40.00 40.00 d 48.00 46.00 45.00 c 44.00 28.00 18.00 18.00
1973 30.00 37.00 31.00 33.00 38.00 41.00 46.00 46.00 45.00 42.00 33.00 35.00 30.00
1974 26.00 31.00 29.00 33.00 a 33.00 40.00 43.00 47.00 47.00 a 39.00 33.00 29.00 26.00
1975 25.00 32.00 29.00 28.00 32.00 42.00 42.00 43.00 46.00 a 39.00 32.00 32.00 25.00
1976 31.00 26.00 28.00 32.00 e 39.00 40.00 l 48.00 a 48.00 48.00 45.00 b 36.00 40.00 26.00
1977 33.00 a 32.00 a 30.00 37.00 34.00 a 43.00 b 46.00 49.00 a 47.00 42.00 30.00 33.00 30.00
1978 36.00 34.00 34.00 35.00 38.00 45.00 47.00 47.00 46.00 42.00 32.00 28.00 28.00
1979 29.00 30.00 31.00 33.00 36.00 43.00 45.00 47.00 51.00 40.00 34.00 34.00 29.00
1980 27.00 37.00 32.00 36.00 37.00 40.00 46.00 46.00 44.00 ----- z 40.00 30.00 27.00
1981 34.00 33.00 34.00 36.00 39.00 43.00 47.00 a 49.00 47.00 40.00 37.00 35.00 33.00
1982 27.00 30.00 32.00 33.00 38.00 39.00 46.00 48.00 45.00 42.00 35.00 32.00 27.00
1983 32.00 37.00 36.00 35.00 38.00 41.00 46.00 51.00 51.00 47.00 35.00 32.00 32.00
1984 30.00 28.00 35.00 35.00 39.00 43.00 48.00 49.00 50.00 36.00 32.00 29.00 28.00
1985 30.00 30.00 31.00 37.00 38.00 41.00 51.00 47.00 42.00 39.00 26.00 29.00 26.00
1986 36.00 31.00 32.00 36.00 33.00 44.00 46.00 49.00 43.00 44.00 ----- z 34.00 31.00
1987 27.00 30.00 31.00 36.00 38.00 42.00 44.00 42.00 47.00 ----- z ----- z 26.00 26.00
1988 27.00 30.00 ----- z ----- z 31.00 38.00 47.00 44.00 43.00 40.00 34.00 23.00 23.00
1989 25.00 14.00 25.00 32.00 39.00 41.00 45.00 46.00 45.00 39.00 35.00 34.00 14.00
1990 30.00 23.00 29.00 38.00 38.00 42.00 46.00 46.00 49.00 36.00 38.00 14.00 14.00
1991 28.00 33.00 a 30.00 35.00 36.00 40.00 49.00 ----- z 46.00 37.00 33.00 32.00 28.00
1992 28.00 32.00 34.00 36.00 43.00 41.00 46.00 49.00 48.00 44.00 37.00 32.00 28.00
1993 27.00 32.00 38.00 39.00 37.00 42.00 49.00 47.00 45.00 44.00 30.00 31.00 27.00
1994 30.00 28.00 30.00 35.00 39.00 40.00 45.00 47.00 45.00 39.00 28.00 27.00 27.00
1995 28.00 28.00 29.00 30.00 36.00 37.00 43.00 47.00 47.00 42.00 39.00 34.00 28.00
1996 32.00 29.00 33.00 36.00 40.00 42.00 56.00 47.00 46.00 39.00 36.00 34.00 29.00
1997 23.00 36.00 35.00 36.00 40.00 44.00 49.00 50.00 48.00 40.00 38.00 32.00 23.00
1998 31.00 33.00 31.00 33.00 38.00 43.00 47.00 49.00 46.00 39.00 38.00 25.00 25.00
1999 28.00 29.00 31.00 28.00 35.00 40.00 44.00 49.00 51.00 47.00 35.00 30.00 28.00
2000 30.00 29.00 31.00 35.00 36.00 42.00 44.00 48.00 43.00 38.00 28.00 33.00 28.00
2001 29.00 27.00 31.00 26.00 40.00 42.00 41.00 41.00 41.00 39.00 29.00 26.00 26.00
2002 25.00 31.00 29.00 34.00 39.00 45.00 51.00 46.00 47.00 41.00 38.00 31.00 25.00
2003 34.00 32.00 34.00 31.00 33.00 43.00 51.00 48.00 46.00 45.00 30.00 26.00 26.00
2004 26.00 30.00 34.00 35.00 38.00 40.00 50.00 47.00 40.00 34.00 27.00 29.00 26.00
2005 29.00 29.00 31.00 29.00 39.00 38.00 54.00 53.00 40.00 40.00 32.00 31.00 29.00
2006 30.00 24.00 27.00 30.00 36.00 a ----- z ----- z ----- z ----- z ----- z ----- z ----- z 24.00
Period of Record Statistics
MEAN 29.17 30.72 31.30 33.39 37.17 41.38 46.49 47.43 45.20 40.56 33.52 30.24 26.33
S.D. 3.88 4.57 2.79 3.01 2.46 1.81 3.70 3.46 3.06 3.27 3.61 4.39 4.18
SKEW -0.35 -1.05 -0.11 -0.14 -0.58 0.01 0.26 1.51 -0.23 -0.37 0.08 -1.18 -1.38
MAX 37.00 41.00 38.00 40.00 43.00 45.00 58.00 60.00 51.00 47.00 41.00 40.00 33.00
MIN 18.00 14.00 25.00 26.00 31.00 37.00 34.00 41.00 37.00 31.00 26.00 14.00 14.00
NO YRS 54 54 53 54 54 53 53 53 54 52 52 54 43