PORTOLA, CALIFORNIA

Monthly Total Cooling Degree Days

(047085)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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.
Months with 5 missing days or less use mean for missing day(s)
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
1915 0.00 0.00 0.00 0.00 0.00 0.00 17.50 11.50 1.00 0.00 0.00 0.00 z 30.00
1916 0.00 0.00 0.00 0.00 0.00 0.00 162.00 0.00 0.00 0.00 0.00 0.00 162.00
1917 0.00 0.00 0.00 0.00 0.00 0.00 179.00 363.50 1.00 0.00 z 0.00 0.00 543.50
1918 0.00 0.00 0.00 0.00 0.00 3.00 48.50 3.50 0.00 0.50 0.00 0.00 55.50
1919 0.00 0.00 0.00 0.00 0.00 0.00 50.50 12.00 0.00 0.00 0.00 0.00 62.50
1920 0.00 0.00 0.00 0.00 0.00 0.00 0.00 42.50 0.00 0.00 0.00 z 0.00 42.50
1921 0.00 0.00 z 0.00 a 0.00 0.00 z 24.00 7.23 a 14.00 0.00 z 0.00 0.00 0.00 45.23
1922 0.00 0.00 0.00 0.00 0.00 0.00 31.50 0.00 0.00 0.00 0.00 0.00 31.50
1923 0.00 0.00 z 0.00 0.00 0.00 0.00 40.50 5.50 16.50 0.00 0.00 0.00 62.50
1924 0.00 0.00 0.00 0.00 0.00 71.00 95.50 0.00 0.00 0.00 0.00 0.00 166.50
1925 0.00 0.00 0.00 0.00 0.00 33.10 a 37.00 0.00 0.00 0.00 0.00 0.00 70.10
1926 0.00 0.00 0.00 0.00 0.00 z 10.00 91.00 0.00 z 0.00 z 0.00 z 0.00 0.00 101.00
1927 0.00 0.00 0.00 0.00 0.00 0.00 67.00 1.00 0.00 e 0.00 0.00 a 0.00 a 68.00
1928 0.00 0.00 0.00 a 0.00 0.00 0.00 33.50 0.00 0.00 0.00 0.00 0.00 33.50
1929 0.00 m 0.00 l 0.00 0.00 0.00 8.00 36.50 0.00 z 0.00 0.00 0.00 0.00 44.50
1930 0.00 0.00 0.00 0.00 0.00 5.00 2.00 0.00 0.00 0.00 0.00 0.00 7.00
1931 0.00 0.00 0.00 0.00 0.00 a 0.00 114.00 12.50 1.50 0.00 0.00 0.00 128.00
1932 0.00 0.00 0.00 0.00 0.00 94.00 0.00 z 79.57 a 0.00 0.00 0.00 z 0.00 173.57
1933 0.00 0.00 0.00 0.00 0.00 3.00 33.00 23.00 1.50 18.00 0.00 0.00 78.50
1934 0.00 0.00 0.00 0.00 0.00 0.00 10.50 0.00 z 0.00 z 0.00 0.00 0.00 10.50
1935 0.00 z 0.00 0.00 0.00 0.00 1.50 29.50 16.50 0.00 0.00 c 0.00 i 0.00 47.50
1936 0.00 a 0.00 f 0.00 0.00 0.00 f 18.50 31.00 12.00 0.00 z 0.00 0.00 0.00 61.50
1937 0.00 l 0.00 0.00 0.00 0.00 3.00 40.00 16.50 5.00 0.00 0.00 0.00 64.50
1938 0.00 0.00 0.00 0.00 0.00 2.50 36.50 1.50 0.00 0.00 a 0.00 0.00 40.50
1939 0.00 0.00 0.00 0.00 1.00 0.00 59.50 42.00 0.00 0.00 0.00 0.00 102.50
1940 0.00 0.00 0.00 0.00 0.00 22.50 2.50 10.00 0.00 0.00 0.00 0.00 a 35.00
1941 0.00 0.00 0.00 0.00 0.00 0.00 20.00 1.50 0.00 a 0.00 0.00 0.00 21.50
1942 0.00 0.00 0.00 0.00 0.00 9.00 38.00 24.80 a 0.00 a 0.00 a 0.00 0.00 71.80
1943 0.00 0.00 0.00 z 0.00 z 0.00 0.00 a 19.00 0.00 1.00 0.00 0.00 0.00 20.00
1944 0.00 z 0.00 0.00 0.00 0.00 0.00 9.00 7.75 a 3.50 0.00 0.00 0.00 20.25
1945 0.00 0.00 0.00 0.00 0.00 1.50 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 1.50
1946 0.00 0.00 0.00 0.00 0.00 0.00 33.00 17.00 0.00 0.00 0.00 0.00 50.00
1947 0.00 0.00 0.00 0.00 0.00 0.50 0.00 5.50 0.00 0.00 0.00 0.00 6.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 11.00 0.00 0.00 0.00 0.00 0.00 11.00
1949 0.00 0.00 0.00 0.00 0.00 2.50 28.50 23.25 a 18.00 0.00 g 0.00 0.00 72.25
1950 0.00 0.00 0.00 0.00 0.00 15.50 11.00 11.50 14.50 0.00 0.00 0.00 52.50
1951 0.00 0.00 0.00 0.00 1.50 1.50 32.50 11.50 4.04 d 0.00 b 0.00 0.00 51.04
1952 0.00 0.00 0.00 0.00 0.00 0.50 66.00 16.50 2.50 0.00 0.00 0.00 85.50
1953 0.00 0.00 a 0.00 0.00 0.00 0.00 35.00 18.50 15.50 0.00 0.00 0.00 69.00
1954 0.00 0.00 0.00 0.00 1.50 12.50 43.00 8.50 0.00 0.00 0.00 0.00 65.50
1955 0.00 0.00 0.00 a 0.00 0.00 21.50 25.00 13.00 30.00 0.00 0.00 0.00 89.50
1956 0.00 0.00 0.00 0.00 0.00 13.00 73.50 0.00 2.00 0.00 a 0.00 0.00 88.50
1957 0.00 0.00 0.00 0.00 0.00 10.50 7.50 0.00 5.00 0.00 0.00 0.00 23.00
1958 0.00 0.00 0.00 0.00 0.00 6.50 30.50 74.50 0.00 z 0.00 a 0.00 0.00 111.50
1959 0.00 c 0.00 0.00 0.00 0.00 18.00 112.00 35.00 3.50 0.00 0.00 0.00 168.50
1960 0.00 c 0.00 e 0.00 a 0.00 0.00 1.15 d 67.50 24.50 0.00 0.00 0.00 f 0.00 93.15
1961 0.00 0.00 0.00 0.00 0.00 22.00 f 20.00 33.30 d 0.00 0.00 f 0.00 a 0.00 53.30
1962 0.00 0.00 0.00 0.00 0.00 2.50 10.50 4.50 0.00 0.00 0.00 0.00 17.50
1963 0.00 0.00 0.00 0.00 0.00 0.00 3.50 1.50 10.00 0.00 0.00 0.00 15.00
1964 0.00 0.00 0.00 0.00 0.00 0.00 35.00 0.00 z 0.00 0.00 0.00 0.00 35.00
1965 0.00 0.00 0.00 0.00 0.00 0.00 22.50 7.50 0.00 0.00 0.00 0.00 30.00
1966 0.00 0.00 0.00 0.00 0.00 2.00 12.50 70.00 0.50 0.00 0.00 0.00 85.00
1967 0.00 0.00 0.00 0.00 0.00 8.50 50.50 81.63 a 7.50 0.00 0.00 0.00 148.13
1968 0.00 z 0.00 0.00 0.00 0.00 8.00 85.50 9.50 3.00 0.00 0.00 0.00 106.00
1969 0.00 0.00 0.00 0.00 0.00 5.00 49.00 24.50 2.50 0.00 0.00 0.00 81.00
1970 0.00 0.00 0.00 0.00 0.00 10.50 12.00 2.00 0.00 e 0.00 i 0.00 0.00 z 24.50
1971 0.00 u 0.00 0.00 r 0.00 e 0.00 e 0.00 z 22.73 a 15.50 e 0.00 0.00 l 0.00 q 0.00 m 38.23
1972 0.00 e 0.00 i 0.00 g 0.00 c 0.00 c 5.00 i 44.78 d 22.50 f 0.00 e 0.00 k 0.00 m 0.00 z 44.78
1973 0.00 n 0.00 k 0.00 z 0.00 o 0.00 i 0.00 o 1.50 n 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1974 0.00 z 0.00 h 0.00 0.00 c 0.00 d 5.50 19.50 1.50 0.00 0.00 z 0.00 z 0.00 w 26.50
1975 0.00 c 0.00 d 0.00 c 0.00 d 0.00 i 1.15 d 22.45 b 0.53 b 3.33 c 0.00 0.00 f 0.00 d 27.47
1976 0.00 d 0.00 e 0.00 d 0.00 g 0.00 h 0.00 b 18.17 b 2.00 f 13.00 0.00 b 0.00 b 0.00 a 31.17
1977 0.00 b 0.00 c 0.00 j 0.00 c 0.00 d 58.00 g 35.43 c 73.07 c 0.00 e 0.00 k 0.00 e 0.00 w 108.50
1978 0.00 n 0.00 c 0.00 d 0.00 a 0.00 a 1.11 c 65.50 105.73 c 0.00 c 0.00 a 0.00 c 0.00 m 172.34
1979 0.00 b 0.00 d 0.00 c 0.00 0.00 b 2.59 a 72.33 a 28.00 12.41 a 0.00 c 0.00 b 0.00 b 115.33
1980 0.00 0.00 b 0.00 a 0.00 0.00 e 0.00 b 93.57 d 8.27 a 0.00 c 0.00 0.00 j 0.00 d 101.84
1981 0.00 c 0.00 0.00 d 0.00 b 0.00 z 31.03 a 36.68 a 110.88 e 0.00 z 0.00 z 0.00 h 0.00 d 178.60
1982 0.00 0.00 0.00 j 0.00 0.00 6.50 28.00 47.00 2.00 0.00 k 0.00 0.00 83.50
1983 0.00 0.00 0.00 0.00 0.00 0.00 13.00 31.00 2.50 0.00 0.00 0.00 a 46.50
1984 0.00 d 0.00 z 0.00 r 0.00 5.00 0.00 123.50 26.50 8.50 0.00 0.00 0.00 163.50
1985 0.00 0.00 0.00 0.00 0.00 a 37.00 65.50 13.50 0.00 0.00 0.00 0.00 116.00
1986 0.00 0.00 0.00 0.00 14.00 5.00 9.00 26.00 6.00 0.00 0.00 0.00 60.00
1987 0.00 0.00 0.00 0.00 0.00 18.50 31.00 29.00 5.00 0.00 0.00 0.00 83.50
1988 0.00 0.00 0.00 0.00 0.00 30.50 105.00 75.00 29.50 0.00 0.00 0.00 240.00
1989 0.00 0.00 0.00 0.00 0.00 0.00 23.00 1.00 0.00 0.00 0.00 0.00 24.00
1990 0.00 0.00 0.00 0.00 0.00 1.00 54.50 73.00 0.00 0.00 0.00 0.00 128.50
1991 0.00 0.00 0.00 0.00 0.00 0.00 62.00 11.50 5.50 0.00 0.00 0.00 79.00
1992 0.00 0.00 0.00 0.00 0.00 21.50 44.50 79.50 0.50 0.00 0.00 a 0.00 146.00
1993 0.00 0.00 0.00 0.00 0.00 2.50 2.00 30.50 2.50 0.00 0.00 0.00 37.50
1994 0.00 0.00 0.00 0.00 0.00 4.00 94.50 7.00 0.00 0.00 0.00 0.00 105.50
1995 0.00 0.00 0.00 0.00 0.00 19.50 21.50 17.00 0.50 0.00 0.00 0.00 58.50
1996 0.00 0.00 0.00 a 0.00 0.00 9.00 116.00 58.50 0.00 0.00 0.00 0.00 a 183.50
1997 0.00 0.00 0.00 0.00 0.00 0.00 26.50 39.00 1.00 0.00 0.00 0.00 66.50
1998 0.00 0.00 0.00 0.00 0.00 0.00 63.00 60.50 25.00 0.00 0.00 0.00 148.50
1999 0.00 b 0.00 0.00 b 0.00 0.00 12.00 e 0.00 z 17.05 a 1.55 a 0.00 a 0.00 a 0.00 30.60
2000 0.00 b 0.00 a 0.00 0.00 a 5.50 27.00 13.50 46.50 3.50 0.00 0.00 0.00 96.00
2001 0.00 0.00 a 0.00 0.00 1.00 13.50 56.50 49.50 0.00 s 0.00 0.00 0.00 120.50
2002 0.00 0.00 0.00 0.00 0.00 7.50 101.00 51.00 4.50 0.00 0.00 0.00 164.00
2003 0.00 0.00 0.00 0.00 6.50 22.50 123.50 30.00 9.00 0.00 0.00 0.00 191.50
2004 0.00 0.00 0.00 0.00 0.00 0.00 50.50 45.50 0.00 0.00 0.00 0.00 96.00
2005 0.00 c 0.00 0.00 0.00 2.00 0.00 105.00 31.00 0.00 0.00 0.00 0.00 z 138.00
2006 0.00 0.00 0.00 0.00 0.50 44.50 109.50 11.00 2.50 0.00 0.00 0.00 168.00
2007 0.00 0.00 0.00 0.00 0.00 0.00 84.50 35.00 2.00 0.00 0.00 0.00 121.50
2008 0.00 0.00 0.00 0.00 5.50 9.00 53.50 69.50 1.50 0.00 0.00 0.00 139.00
2009 0.00 0.00 0.00 0.00 0.00 9.00 92.00 40.00 11.90 a 0.00 0.00 0.00 152.90
2010 0.00 0.00 0.00 0.00 0.00 8.00 78.50 22.50 3.50 1.15 d 0.00 0.00 113.65
2011 0.00 c 0.00 e 0.00 0.00 d 0.00 b 1.55 a 47.02 a 21.70 a 2.59 a 0.00 v 0.00 e 0.00 d 72.85
2012 0.00 d 0.00 a 0.00 e 0.00 c 0.00 j 8.00 p 26.00 91.45 a 6.50 0.00 0.00 a 0.00 123.95
2013 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.00 0.49 8.80 47.59 30.28 3.55 0.23 0.00 0.00 88.65
S.D. 0.00 0.00 0.00 0.00 1.89 14.89 37.29 44.50 6.26 1.95 0.00 0.00 53.48
SKEW 0.00 0.00 0.00 0.00 5.15 3.24 1.14 4.92 2.55 8.99 0.00 0.00 0.56
MAX 0.00 0.00 0.00 0.00 14.00 94.00 179.00 363.50 30.00 18.00 0.00 0.00 240.00
MIN 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6.00
NO YRS 89 90 91 94 89 91 94 90 89 85 87 89 58