IMPERIAL, CALIFORNIA

Monthly Total Heating Degree Days

(044223)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201302
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
1901 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 28.00 276.00 304.00
1902 303.00 152.50 117.50 11.00 0.00 0.00 0.00 0.00 0.00 0.00 210.50 377.00 1171.50
1903 265.00 269.00 27.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 z 360.50 922.00
1904 388.50 137.00 13.00 11.00 0.50 0.00 0.00 0.00 0.00 4.65 a 49.00 292.50 896.15
1905 236.00 245.00 62.00 9.50 6.00 0.00 0.00 a 0.00 f 0.00 3.00 137.50 377.50 1076.50
1906 350.00 88.00 130.41 b 40.00 2.00 0.00 0.00 0.00 c 0.00 23.00 207.50 359.00 1199.91
1907 401.00 78.50 140.53 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 120.00 0.00 z 740.03
1908 322.50 249.00 105.50 5.50 3.21 b 0.00 0.00 c 0.00 b 0.00 z 0.00 z 0.00 z 0.00 z 685.71
1909 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
1910 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 185.00 185.00
1911 290.00 291.50 46.00 1.50 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 629.00
1912 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
1913 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
1914 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
1915 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
1916 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
1917 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
1918 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
1919 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
1920 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
1921 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
1922 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
1923 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
1924 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
1925 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 7.75 a 143.50 276.50 427.75
1926 344.50 107.00 24.00 1.50 0.00 q 0.00 d 0.00 b 0.00 0.00 c 1.07 b 80.50 400.00 958.57
1927 300.50 164.00 112.50 32.50 0.00 0.00 0.00 0.00 c 0.00 1.55 a 88.33 c 363.50 1062.88
1928 271.50 215.50 37.00 18.75 b 0.00 0.00 0.00 0.00 0.00 15.50 124.50 364.00 1046.75
1929 438.50 278.00 122.50 70.00 0.00 0.00 a 20.00 0.00 0.00 0.00 z 184.00 217.50 1330.50
1930 376.00 129.50 119.00 6.50 27.00 0.00 0.00 0.00 0.00 1.50 164.00 419.50 1243.00
1931 319.00 181.00 85.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 268.50 431.50 1285.50
1932 0.00 z 233.00 65.00 24.50 0.00 0.00 0.00 0.00 0.00 9.50 62.00 199.50 o 394.00
1933 459.50 389.50 61.00 38.50 10.50 0.00 0.00 0.00 0.00 0.00 88.33 c 287.00 1334.33
1934 265.50 69.00 0.00 6.00 0.00 0.00 0.00 0.00 0.00 0.00 86.00 242.50 669.00
1935 305.50 144.00 149.50 16.00 0.00 0.00 0.00 0.00 0.00 14.50 170.50 278.00 1078.00
1936 312.50 173.50 40.00 19.00 0.00 0.00 0.00 0.00 0.00 0.00 111.00 317.00 973.00
1937 655.00 260.50 129.00 16.00 0.00 0.00 0.00 0.00 0.00 0.00 55.00 196.50 1312.00
1938 255.50 222.50 125.50 14.00 0.00 0.00 0.00 0.00 0.00 2.50 238.00 246.50 1104.50
1939 355.50 354.50 128.50 4.00 0.00 0.00 0.00 0.00 0.00 1.50 46.00 170.50 1060.50
1940 227.50 192.50 43.00 2.50 0.00 0.00 0.00 0.00 0.00 6.00 131.50 204.50 807.50
1941 266.00 111.50 53.50 31.50 0.50 0.00 0.00 0.00 0.00 14.50 101.50 275.00 854.00
1942 269.00 240.00 103.00 5.50 0.00 0.00 0.00 0.00 0.00 7.00 84.50 228.00 937.00
1943 289.50 135.00 20.50 19.00 0.00 0.00 0.00 0.00 0.00 6.00 96.00 321.50 887.50
1944 343.50 305.50 125.00 7.00 0.00 0.00 0.00 0.00 0.00 0.00 152.50 279.50 1213.00
1945 318.50 184.00 165.00 64.50 0.00 0.00 0.00 0.00 0.00 0.00 136.00 338.00 1206.00
1946 314.50 245.50 92.00 10.00 0.00 0.00 0.00 0.00 0.00 10.00 180.00 240.50 1092.50
1947 376.50 98.50 50.50 6.50 0.00 0.00 0.00 0.00 0.00 1.50 221.00 415.50 1170.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 3.50 189.00 405.50 598.00
1949 612.00 313.00 117.00 12.50 0.00 0.00 0.00 0.00 0.00 33.00 13.50 380.00 1481.00
1950 421.50 120.00 76.50 6.50 4.00 0.00 0.00 0.00 0.00 0.00 58.00 139.00 825.50
1951 330.50 219.00 112.00 20.00 2.00 0.00 0.00 0.00 0.00 2.00 132.00 327.00 1144.50
1952 423.00 208.50 198.50 7.00 0.00 0.00 0.00 0.00 0.00 0.00 200.50 307.00 1344.50
1953 162.00 196.00 86.00 30.00 0.00 0.00 0.00 0.00 0.00 3.00 80.50 321.50 879.00
1954 280.50 57.00 120.00 2.00 0.00 a 0.00 0.00 0.00 0.00 5.50 14.50 286.50 766.00
1955 407.50 281.00 84.00 22.00 3.50 0.00 0.00 0.00 0.00 0.00 92.50 227.50 1118.00
1956 213.50 309.00 80.50 35.00 0.00 0.00 0.00 0.00 0.00 11.50 125.00 258.50 1033.00
1957 321.00 89.50 60.00 12.00 0.50 0.00 0.00 0.00 0.00 0.50 147.50 222.50 853.50
1958 232.50 98.50 141.50 39.50 0.00 0.00 0.00 0.00 0.00 2.00 99.50 174.50 788.00
1959 209.50 186.00 f 19.12 a 0.00 0.00 0.00 0.00 0.00 0.00 17.00 58.50 276.50 580.62
1960 399.50 229.00 28.00 10.50 0.00 0.00 0.00 0.00 0.00 0.00 95.00 312.50 1074.50
1961 216.00 118.00 48.00 1.00 1.00 0.00 0.00 0.00 0.00 22.50 140.50 303.50 850.50
1962 304.50 167.00 179.50 0.00 8.00 0.00 0.00 0.00 0.00 0.00 48.50 217.50 925.00
1963 404.50 49.00 96.00 33.00 0.00 0.00 0.00 0.00 0.00 0.00 75.00 280.50 938.00
1964 404.50 254.50 143.00 40.00 20.00 0.00 0.00 0.00 0.00 0.00 167.50 258.00 1287.50
1965 243.50 174.00 109.00 61.00 0.00 0.00 0.00 0.00 0.00 0.00 58.00 304.50 950.00
1966 378.50 255.00 70.50 3.50 0.00 0.00 0.00 0.00 0.00 0.00 61.50 257.50 1026.50
1967 298.50 135.50 42.50 68.00 2.00 0.00 0.00 0.00 0.00 0.00 29.50 366.00 942.00
1968 288.00 54.50 43.50 14.50 0.00 0.00 0.00 0.00 0.00 0.00 42.00 392.00 834.50
1969 174.50 209.50 127.00 1.50 5.00 0.00 0.00 0.00 0.00 0.00 65.00 227.50 810.00
1970 303.50 102.00 72.00 47.50 0.00 0.00 0.00 0.00 0.00 11.00 70.00 305.00 911.00
1971 324.00 173.00 93.50 31.50 2.50 0.00 0.00 0.00 0.00 70.50 119.00 388.00 1202.00
1972 375.00 116.50 12.00 14.50 0.00 0.00 0.00 0.00 0.00 10.50 141.50 334.00 1004.00
1973 363.50 159.00 129.00 15.50 0.00 0.00 0.00 0.00 0.00 0.00 109.00 231.50 1007.50
1974 282.50 188.50 71.50 3.00 2.00 0.00 0.00 0.00 0.00 8.50 55.00 349.50 960.50
1975 308.50 208.50 130.00 80.50 1.50 0.00 0.00 0.00 0.00 11.00 104.00 250.00 1094.00
1976 245.50 123.00 96.50 39.50 0.00 0.00 0.00 0.00 0.00 2.00 64.00 263.00 833.50
1977 258.50 89.00 151.00 17.00 0.00 0.00 0.00 0.00 0.00 0.00 36.00 168.50 720.00
1978 236.50 126.00 19.50 13.00 0.00 0.00 0.00 0.00 0.00 0.00 124.50 372.50 892.00
1979 384.50 171.00 78.50 2.50 1.50 0.00 0.00 0.00 0.00 1.00 96.00 189.50 924.50
1980 161.00 71.00 65.00 20.00 1.50 0.00 0.00 0.00 0.00 0.50 89.50 119.50 528.00
1981 130.00 119.00 71.00 2.50 0.00 0.00 0.00 0.00 0.00 3.50 44.00 163.50 533.50
1982 285.50 129.00 78.50 16.00 0.00 0.00 0.00 0.00 0.00 1.00 105.00 299.00 914.00
1983 188.50 127.50 53.00 37.00 0.00 0.00 0.00 0.00 0.00 0.00 102.50 194.50 703.00
1984 195.00 143.50 25.50 12.50 0.00 0.00 0.00 0.00 0.00 3.00 98.50 321.50 799.50
1985 312.00 212.50 71.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 162.50 246.00 1004.50
1986 115.50 109.50 29.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 42.00 248.50 544.50
1987 311.50 150.00 58.50 1.50 0.00 0.00 0.00 0.00 0.00 0.00 78.00 360.00 959.50
1988 294.50 103.50 55.00 10.00 3.00 0.00 0.00 0.00 0.00 0.00 102.50 281.00 849.50
1989 337.50 184.00 27.50 1.00 0.50 0.00 0.00 0.00 0.00 10.00 56.00 266.00 882.50
1990 313.00 214.50 63.00 1.00 0.00 0.00 0.00 0.00 0.00 0.00 92.00 424.00 1107.50
1991 312.50 36.50 156.50 12.00 0.50 0.00 0.00 0.00 0.00 22.00 97.00 280.00 917.00
1992 284.00 85.50 51.50 6.50 0.00 0.00 0.00 0.00 0.00 0.00 156.50 425.00 1009.00
1993 342.50 178.50 30.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 133.00 314.50 999.00
1994 231.00 226.50 26.50 11.00 0.00 0.00 0.00 0.00 0.00 2.50 253.50 359.00 1110.00
1995 297.00 48.50 66.50 31.50 6.50 0.00 0.00 0.00 0.00 0.50 11.50 226.00 688.00
1996 223.00 110.00 49.00 0.00 0.00 0.00 0.00 0.00 0.00 49.50 78.00 282.00 791.50
1997 249.50 196.50 51.50 36.50 0.00 0.00 0.00 0.00 0.00 5.50 66.50 366.50 972.50
1998 262.00 212.50 109.50 64.50 0.00 0.00 0.00 0.00 0.00 3.00 105.50 330.00 1087.00
1999 258.00 177.00 118.50 103.50 1.50 0.00 0.00 0.00 0.00 0.00 46.50 251.00 956.00
2000 199.00 105.00 73.00 0.00 0.00 0.00 0.00 0.00 0.00 2.50 189.00 198.00 766.50
2001 310.50 212.50 62.50 31.00 0.00 0.00 0.00 0.00 0.00 0.00 52.00 321.00 989.50
2002 282.50 140.50 101.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 29.00 256.00 809.00
2003 62.00 132.50 38.50 20.00 0.00 0.00 0.00 0.00 0.00 0.00 115.50 263.50 632.00
2004 250.00 215.00 23.50 9.50 0.00 0.00 0.00 0.00 0.00 22.50 145.00 276.50 942.00
2005 217.50 165.50 35.00 2.00 0.00 0.00 0.00 0.00 0.00 0.00 48.00 206.00 674.00
2006 212.00 92.50 100.50 5.00 0.00 0.00 0.00 0.00 0.00 0.00 43.50 294.50 748.00
2007 368.00 112.00 42.00 4.50 0.00 0.00 0.00 0.00 0.00 0.00 61.50 400.50 988.50
2008 361.00 180.00 65.00 5.50 1.00 0.00 0.00 0.00 0.00 4.50 23.00 320.50 960.50
2009 202.00 179.00 72.50 20.00 0.00 z 0.00 z 0.00 0.00 0.00 12.00 81.50 323.00 890.00
2010 251.00 153.00 93.50 40.00 1.50 0.00 z 0.00 0.00 0.00 1.00 168.50 241.00 949.50
2011 318.00 289.50 79.00 29.00 1.50 0.00 0.00 0.00 0.00 6.00 191.00 498.00 1412.00
2012 330.00 243.00 148.00 46.00 0.00 0.00 0.00 0.00 0.00 0.00 50.50 270.50 1088.00
2013 353.00 215.00 21.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 16.00 z 589.50
Period of Record Statistics
MEAN 300.51 172.44 79.40 18.88 1.33 0.00 0.22 0.00 0.00 5.39 104.22 292.17 968.57
S.D. 88.83 72.91 43.36 20.57 3.85 0.00 2.07 0.00 0.00 10.60 57.30 74.13 197.31
SKEW 0.80 0.44 0.40 1.65 4.84 0.00 9.49 0.00 0.00 3.72 0.69 0.15 0.13
MAX 655.00 389.50 198.50 103.50 27.00 0.00 20.00 0.00 0.00 70.50 268.50 498.00 1481.00
MIN 62.00 36.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11.50 119.50 528.00
NO YRS 94 94 95 93 91 90 93 92 92 92 94 94 83