HEALDSBURG, CALIFORNIA

Monthly Total Cooling Degree Days

(043875)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201208
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
1893 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 z 0.00 z 0.00 z 0.00
1894 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 z 0.00 z 0.00 z 0.00
1895 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 z 0.00 z 0.00 z 0.00
1896 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 z 0.00 z 0.00 z 0.00
1897 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 z 0.00 z 0.00 z 0.00
1898 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 z 0.00 z 0.00 z 0.00
1899 0.00 z 0.00 z 0.00 4.14 a 18.00 98.00 80.60 a 35.00 17.00 q 36.96 e 0.00 0.00 272.70
1900 0.00 g 0.00 0.00 0.00 44.50 85.50 112.50 83.50 50.00 11.00 0.00 0.00 387.00
1901 0.00 2.50 2.00 0.00 21.00 118.00 65.50 61.00 34.50 67.00 0.00 0.00 371.50
1902 0.00 0.00 0.00 1.00 0.00 85.00 132.50 82.67 a 70.50 0.50 0.00 0.00 372.17
1903 0.00 0.00 0.00 0.00 65.00 184.50 97.00 0.00 z 136.03 a 75.50 0.00 c 0.00 e 558.03
1904 0.00 a 0.00 0.00 12.50 0.00 z 164.46 b 122.34 c 114.59 c 143.04 b 36.74 d 0.00 a 0.00 593.67
1905 0.00 0.00 a 1.55 a 4.50 13.95 a 53.89 c 209.25 a 156.50 37.50 p 17.00 g 0.00 k 0.00 b 439.64
1906 0.00 a 0.00 a 0.00 z 3.00 e 6.41 b 107.07 a 281.30 d 174.63 a 161.50 89.50 29.50 0.00 c 852.91
1907 0.00 3.00 0.00 a 18.89 c 42.88 a 84.44 c 139.50 a 114.59 c 40.96 d 26.57 c 5.50 h 0.00 d 470.84
1908 0.00 e 0.00 d 34.44 d 17.00 j 34.00 i 74.00 f 89.50 s 21.50 p 102.00 h 10.50 l 0.00 j 0.00 b 34.44
1909 0.00 f 0.00 0.00 6.00 31.00 158.50 162.50 95.50 86.00 34.00 0.50 0.00 574.00
1910 0.00 0.00 0.00 24.50 107.98 a 69.50 107.00 65.32 c 41.38 a 31.00 0.00 z 0.00 c 446.68
1911 0.00 0.00 0.00 0.00 b 2.00 53.00 136.50 67.00 36.96 b 25.00 1.07 b 0.00 321.54
1912 0.00 b 0.00 0.00 h 3.46 d 72.13 e 131.00 61.47 b 109.50 90.00 a 10.00 0.00 0.00 e 477.56
1913 0.00 m 0.00 a 0.00 b 15.52 a 39.55 b 68.89 c 215.34 c 228.00 182.00 47.53 a 0.00 a 0.00 796.83
1914 0.00 0.00 24.50 14.50 4.50 59.00 58.50 g 84.45 b 43.45 a 10.50 0.00 q 0.00 240.90
1915 0.00 n 0.00 a 0.00 e 0.50 31.00 c 0.00 z 160.00 202.50 59.50 27.00 2.50 0.00 483.00
1916 0.00 0.00 a 2.14 b 11.11 c 7.23 a 57.50 205.50 156.07 b 110.89 b 0.00 h 0.00 0.00 550.44
1917 0.00 0.00 0.00 6.96 b 5.50 133.89 c 176.50 69.00 155.17 a 78.03 b 0.00 b 0.00 p 625.06
1918 0.00 0.00 0.00 b 9.00 3.00 95.89 b 95.00 108.00 20.36 b 21.70 a 0.00 a 0.00 d 352.95
1919 0.00 p 0.00 c 0.00 e 0.00 b 10.00 t 43.00 h 74.00 105.83 b 86.38 a 0.00 z 0.00 0.00 266.21
1920 0.00 a 0.00 0.00 1.55 a 22.73 a 95.00 71.30 a 123.00 60.00 7.23 a 0.00 0.00 a 380.82
1921 0.00 a 0.00 0.00 27.50 j 4.00 128.04 b 127.10 a 58.50 86.50 31.50 0.00 0.00 a 435.64
1922 0.00 0.00 a 0.00 0.00 38.00 67.00 100.50 109.50 126.50 0.50 0.00 a 0.00 442.00
1923 0.00 0.00 7.50 0.50 38.50 41.54 d 101.78 a 144.50 124.50 22.00 0.00 a 0.00 480.82
1924 0.00 0.00 0.00 9.00 45.50 70.00 78.53 a 68.00 76.55 a 24.80 a 0.00 0.00 a 372.39
1925 0.00 0.00 0.00 b 0.00 4.65 a 108.00 120.00 69.00 11.50 14.00 0.00 0.00 327.15
1926 0.00 1.50 3.00 16.00 88.00 106.55 a 196.00 156.55 a 62.68 b 41.00 0.00 a 0.00 671.28
1927 0.00 0.00 0.00 9.00 38.00 99.00 0.00 z 123.00 79.50 35.50 0.00 0.00 384.00
1928 0.00 0.00 z 0.00 3.50 37.50 132.50 131.50 156.00 122.00 28.00 0.00 0.00 a 611.00
1929 0.00 0.00 1.55 a 0.00 7.50 144.50 155.00 117.00 60.50 30.00 4.50 0.00 520.55
1930 0.00 4.50 10.50 0.00 7.50 90.00 101.50 143.00 25.00 19.00 0.00 0.00 401.00
1931 0.00 0.00 0.00 4.00 85.50 107.00 239.00 131.00 60.00 8.00 2.50 0.00 637.00
1932 0.00 0.00 0.00 0.00 46.00 86.50 133.50 115.00 110.00 18.50 12.00 0.00 521.50
1933 0.00 0.00 0.00 3.00 26.50 30.50 113.50 116.00 41.00 58.50 0.00 0.00 389.00
1934 0.00 0.00 2.00 5.00 34.00 78.50 125.50 153.00 159.00 25.00 3.00 0.00 585.00
1935 0.00 0.00 0.00 0.00 46.00 158.89 c 130.50 133.00 62.50 16.50 0.00 0.00 547.39
1936 0.00 0.00 0.00 6.00 55.50 125.50 194.00 186.50 145.50 41.50 0.00 0.00 754.50
1937 0.00 0.00 0.00 1.00 58.50 105.50 198.00 209.00 135.50 58.50 0.00 0.00 766.00
1938 0.00 0.00 0.00 6.50 35.50 104.50 177.00 142.00 131.50 8.00 0.00 0.00 605.00
1939 0.00 0.00 0.00 4.50 46.50 129.50 164.50 122.50 178.00 44.00 0.00 0.00 689.50
1940 0.00 0.00 0.00 5.50 12.50 56.50 95.00 93.00 95.00 47.50 0.00 0.00 405.00
1941 0.00 0.00 0.00 0.00 30.00 105.50 171.50 164.50 135.00 49.00 2.50 0.00 658.00
1942 0.00 0.00 0.00 0.00 19.50 92.00 132.00 119.00 55.50 30.00 0.00 0.00 448.00
1943 0.00 0.00 0.00 0.00 69.20 c 48.50 122.00 111.08 a 119.50 28.00 0.00 0.00 498.28
1944 0.00 0.00 4.50 0.00 24.00 52.00 39.50 109.00 0.00 z 16.00 0.00 0.00 245.00
1945 0.00 0.00 0.00 22.00 0.00 137.50 154.00 97.50 96.72 a 16.00 6.50 o 0.00 z 523.72
1946 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 70.50 155.52 a 0.00 z 74.50 i 27.79 b 0.00 z 0.00 z 253.81
1947 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 z 0.00 z 0.00 z 0.00
1948 0.00 0.00 0.00 0.00 4.50 66.00 123.50 117.50 86.50 23.00 0.00 0.00 421.00
1949 0.00 0.00 0.00 6.00 20.00 97.50 92.00 90.50 107.00 22.00 1.50 0.00 436.50
1950 0.00 0.00 0.00 8.50 55.00 68.00 118.50 185.00 112.00 42.00 17.50 0.00 606.50
1951 0.00 f 0.00 1.50 0.00 43.50 28.50 100.50 84.00 76.50 25.00 0.00 0.00 359.50
1952 0.00 0.00 11.50 3.50 66.00 26.50 133.00 121.00 139.50 31.50 0.00 0.00 532.50
1953 0.00 0.00 0.00 0.00 3.50 71.50 164.50 100.00 129.00 26.50 0.00 0.00 495.00
1954 0.00 0.00 0.00 10.00 25.50 132.00 174.50 71.50 76.00 11.50 0.00 0.00 501.00
1955 0.00 0.00 0.50 0.00 57.50 62.50 125.00 97.00 98.50 17.00 11.00 0.00 e 469.00
1956 0.00 0.00 0.00 2.50 32.50 123.00 96.00 110.00 80.00 4.00 0.50 0.00 448.50
1957 0.00 0.00 0.00 16.00 16.00 197.00 166.50 132.00 81.00 0.50 0.00 0.00 609.00
1958 0.00 0.00 0.00 13.50 30.00 131.00 158.50 248.00 261.00 65.00 10.00 0.50 917.50
1959 0.00 0.00 5.50 18.50 48.00 218.50 238.00 181.00 133.50 112.50 3.00 0.00 958.50
1960 0.00 0.00 3.50 12.00 47.50 197.50 194.50 149.50 114.00 16.00 0.50 0.00 735.00
1961 0.00 0.00 0.00 18.00 0.00 199.00 266.00 209.00 109.50 69.00 0.00 0.00 870.50
1962 3.50 0.00 0.00 34.50 19.50 109.00 120.50 198.50 96.50 12.00 0.00 0.00 594.00
1963 0.00 0.00 0.00 0.00 23.50 86.00 149.50 210.00 206.00 26.50 0.00 0.00 701.50
1964 0.00 0.00 0.50 16.00 6.50 106.50 207.00 213.50 150.50 98.00 0.00 0.00 798.50
1965 0.00 0.00 0.00 33.00 17.50 35.50 131.00 211.00 50.50 98.00 1.00 0.00 577.50
1966 0.00 0.00 3.50 26.50 17.00 191.50 148.00 208.00 154.00 59.50 3.50 0.00 811.50
1967 0.00 0.00 0.00 0.00 60.00 65.00 224.50 231.00 222.50 77.00 13.50 0.50 894.00
1968 0.00 1.00 3.00 26.50 47.50 186.00 207.50 191.00 190.00 34.50 0.00 0.00 887.00
1969 0.00 0.00 0.00 2.00 79.00 80.50 206.00 291.50 180.50 31.50 2.00 0.00 873.00
1970 0.00 0.00 8.50 0.00 128.00 0.00 z 187.50 179.00 189.50 31.00 0.00 0.00 723.50
1971 0.00 0.00 0.00 1.00 10.50 118.00 216.00 268.00 220.00 52.00 0.00 0.00 885.50
1972 0.00 0.00 12.50 4.00 57.00 142.00 236.00 212.00 88.50 23.00 0.00 0.00 775.00
1973 0.00 0.00 0.00 10.50 73.00 241.50 218.00 117.00 123.00 20.50 0.00 0.00 803.50
1974 0.00 0.00 0.00 8.00 51.00 124.50 231.00 192.50 164.50 77.00 0.00 0.00 848.50
1975 0.00 0.00 0.00 0.00 102.50 97.00 167.50 157.50 116.50 22.00 0.00 0.00 663.00
1976 0.00 0.00 0.00 4.50 67.50 216.50 227.50 171.00 131.00 69.50 3.50 0.00 891.00
1977 0.00 0.00 0.00 22.50 21.00 177.00 221.00 228.50 116.00 46.00 0.50 0.00 832.50
1978 0.00 0.00 0.50 11.00 134.00 134.50 222.50 231.50 203.50 115.50 2.00 0.00 1055.00
1979 0.00 0.00 0.00 0.00 a 106.00 170.00 270.00 215.50 278.50 63.50 0.00 0.00 1103.50
1980 0.00 0.00 0.00 6.50 31.00 92.50 201.50 129.00 114.50 104.50 9.00 0.00 688.50
1981 0.00 0.00 0.00 10.50 93.00 336.50 202.00 245.50 156.00 10.00 0.00 0.00 1053.50
1982 0.00 0.00 0.00 13.50 60.00 44.50 195.00 232.50 177.00 38.50 0.00 0.00 761.00
1983 0.00 0.00 0.00 0.00 60.50 151.00 257.00 252.00 227.50 62.00 0.00 0.00 1010.00
1984 1.00 0.00 8.00 13.50 159.50 180.50 321.50 280.50 325.00 36.00 0.00 0.00 1325.50
1985 0.00 3.50 2.00 34.50 17.00 174.50 194.00 108.00 51.50 38.00 8.50 0.00 631.50
1986 0.00 0.00 7.00 5.00 45.00 117.50 138.00 97.50 26.00 28.50 0.00 0.00 464.50
1987 0.00 0.00 0.00 14.50 110.50 97.00 106.00 110.00 99.00 80.00 0.00 0.00 617.00
1988 0.00 0.00 10.00 10.50 36.00 135.00 259.50 137.50 96.50 51.00 2.50 0.00 738.50
1989 0.00 0.00 0.00 48.00 36.00 106.50 193.50 120.00 57.50 16.50 0.00 0.00 578.00
1990 0.00 0.00 0.00 30.50 42.00 125.50 149.50 178.50 147.00 55.00 0.00 0.00 728.00
1991 0.00 0.00 0.00 7.00 16.00 63.00 123.00 116.50 113.50 106.50 3.00 0.00 548.50
1992 0.00 0.00 0.00 16.50 80.50 46.50 153.50 194.00 132.50 39.00 4.00 0.00 666.50
1993 0.00 0.00 0.00 14.00 40.50 224.00 227.50 223.00 100.50 19.00 0.00 0.00 848.50
1994 0.00 0.00 0.00 0.50 47.50 160.00 153.50 214.50 96.50 8.00 0.00 0.00 680.50
1995 0.00 0.00 0.00 0.00 22.50 117.00 261.00 210.50 106.00 32.50 0.00 0.00 749.50
1996 0.00 0.00 2.00 37.00 75.50 185.00 273.50 222.00 68.00 54.00 0.00 0.00 917.00
1997 0.00 0.00 5.00 15.00 146.50 158.50 238.50 194.50 144.00 11.50 6.50 0.00 920.00
1998 0.00 0.00 0.00 10.00 0.00 94.00 220.50 247.00 122.50 5.00 0.00 0.00 699.00
1999 0.00 z 0.00 0.00 10.34 a 25.50 141.00 186.50 124.00 a 71.25 b 30.47 b 0.00 a 0.00 589.06
2000 0.00 0.00 0.00 19.14 a 121.70 d 197.22 c 198.92 a 0.00 z 122.50 12.00 0.00 b 0.00 a 671.48
2001 0.00 0.00 2.50 12.00 200.00 266.90 a 232.50 a 245.00 86.38 a 51.50 0.00 a 0.00 1096.78
2002 0.00 0.00 0.00 15.00 76.00 226.50 265.50 213.00 138.00 29.50 0.00 0.00 963.50
2003 0.00 0.00 0.00 0.00 86.00 188.50 303.00 246.50 163.50 0.00 z 0.00 0.00 987.50
2004 0.00 0.00 18.00 47.50 66.00 213.00 234.50 278.50 191.00 32.00 0.00 0.00 1080.50
2005 0.00 0.00 2.50 1.00 60.00 126.50 315.00 205.00 66.00 26.87 a 1.50 0.00 a 804.37
2006 0.00 0.00 0.00 17.00 62.00 240.00 353.29 b 162.23 a 124.50 3.50 2.00 0.00 964.53
2007 0.00 0.00 0.00 17.00 66.00 197.50 253.50 263.00 110.00 2.00 0.00 0.00 909.00
2008 0.00 0.00 b 0.00 17.50 84.00 242.00 243.00 288.00 123.00 37.00 3.50 0.00 1038.00
2009 0.00 0.00 3.00 34.50 75.50 142.24 a 209.25 a 236.50 207.00 11.50 0.00 0.00 919.49
2010 0.00 0.00 0.00 z 0.00 13.00 162.41 a 124.00 111.50 128.00 41.00 5.50 0.00 585.41
2011 0.00 z 0.00 d 4.02 d 2.50 i 20.27 e 85.00 g 121.70 d 104.00 f 143.08 d 27.42 e 0.00 c 0.00 d 316.49
2012 0.00 c 0.00 b 0.00 d 25.34 a 35.28 b 130.00 168.50 149.50 0.00 z 0.00 z 0.00 z 0.00 z 508.62
Period of Record Statistics
MEAN 0.04 0.15 1.91 9.58 46.04 123.72 172.57 157.80 116.16 36.43 1.66 0.01 694.09
S.D. 0.36 0.67 4.94 10.79 37.29 58.70 62.98 61.50 56.69 26.33 4.17 0.07 223.51
SKEW 9.07 4.92 4.15 1.44 1.35 0.75 0.36 0.27 0.82 1.11 4.05 7.18 0.29
MAX 3.50 4.50 34.44 48.00 200.00 336.50 353.29 291.50 325.00 115.50 29.50 0.50 1325.50
MIN 0.00 0.00 0.00 0.00 0.00 26.50 39.50 35.00 11.50 0.50 0.00 0.00 321.54
NO YRS 103 110 109 109 109 108 110 108 107 107 105 109 82