IMPERIAL, CALIFORNIA

Monthly Total Heating Degree Days

(044223)

Base Temperature = 65 F

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.
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
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 z 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 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 410.00
Period of Record Statistics
MEAN 283.53 156.02 78.05 19.28 1.16 0.00 0.00 0.00 0.00 5.88 93.30 282.34 918.23
S.D. 90.36 65.24 42.63 22.26 3.02 0.00 0.00 0.00 0.00 12.63 50.42 70.76 187.05
SKEW 0.55 0.31 0.67 1.68 4.63 0.00 0.00 0.00 0.00 3.35 0.75 -0.04 0.35
MAX 612.00 313.00 198.50 103.50 20.00 0.00 0.00 0.00 0.00 70.50 253.50 425.00 1481.00
MIN 62.00 36.50 12.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11.50 119.50 528.00
NO YRS 58 57 58 58 58 57 58 58 58 58 58 58 55