CHULA VISTA, CALIFORNIA

Monthly Total Heating Degree Days

(041758)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200602
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 50.00 15.50 33.50 109.50 285.50 455.00 949.00
1949 586.00 425.50 372.00 198.00 146.00 39.50 6.50 11.00 21.00 130.00 151.00 417.50 2504.00
1950 516.00 363.00 297.50 213.50 213.00 102.00 3.00 18.00 15.00 l 84.50 213.50 307.50 2331.50
1951 414.50 360.50 218.50 j 210.50 175.50 60.00 6.50 10.50 12.41 a 70.50 193.50 391.50 1905.91
1952 439.00 308.50 345.50 241.50 126.00 118.00 43.50 0.00 17.50 97.50 283.00 381.00 2401.00
1953 311.00 371.00 362.00 273.50 209.00 120.50 5.00 3.50 43.00 77.50 178.50 379.00 2333.50
1954 437.50 220.50 343.50 200.50 130.00 68.50 2.50 1.50 23.50 147.00 172.00 340.00 2087.00
1955 464.50 347.50 298.00 281.50 175.00 78.50 f 12.50 i 0.00 h 15.50 f 105.00 i 195.00 h 259.00 g 1566.50
1956 323.50 f 317.00 h 259.00 j 207.50 g 84.00 i 44.50 h 3.00 i 0.50 i 3.00 i 74.00 h 131.50 k 168.00 m 0.00
1957 366.63 e 175.50 g 272.44 e 169.50 g 116.50 f 20.50 h 0.50 i 2.00 h 2.50 j 56.50 h 162.50 j 172.00 h 639.08
1958 234.00 g 161.50 h 243.50 g 123.50 g 60.00 h 16.50 i 1.50 h 0.00 j 0.50 h 15.50 h 148.00 j 193.50 h 0.00
1959 215.50 h 313.60 c 136.50 h 67.00 h 76.50 i 17.50 h 0.00 i 0.50 i 0.00 j 33.00 h 86.50 k 204.50 g 313.60
1960 294.50 i 260.00 h 217.50 h 163.00 g 88.50 i 21.50 h 9.00 l 0.00 h 5.50 i 72.50 i 188.50 g 292.00 h 0.00
1961 198.50 h 176.00 i 206.00 g 149.00 i 111.00 j 62.50 h 1.00 j 0.00 i 11.50 l 88.00 i 143.00 j 287.00 f 0.00
1962 293.00 f 295.83 e 302.50 g 154.00 i 147.00 g 63.50 j 11.00 i 1.50 h 10.50 k 88.00 h 136.50 l 245.50 i 295.83
1963 287.50 h 139.50 f 251.50 f 278.65 d 83.50 g 61.50 f 14.00 h 0.00 j 0.00 g 27.50 i 146.50 f 209.00 i 278.65
1964 315.50 f 338.14 d 270.50 f 231.00 e 176.00 g 114.60 e 22.00 f 0.50 j 15.50 f 24.50 g 256.80 e 343.00 1283.54
1965 288.00 f 347.67 d 302.85 e 219.44 c 114.00 i 94.00 h 26.00 i 0.00 h 28.20 e 33.00 g 102.50 g 240.50 g 898.16
1966 292.00 i 261.50 g 242.50 g 126.00 h 68.50 i 29.00 g 0.50 i 0.00 b 13.50 46.00 185.00 310.53 b 555.03
1967 378.00 286.00 239.50 334.50 158.10 a 124.50 4.81 b 0.00 0.00 39.00 89.50 375.00 2028.91
1968 344.00 228.50 258.85 a 204.50 156.55 a 82.50 d 15.50 a 4.00 5.50 87.50 197.00 430.38 a 2014.78
1969 276.42 a 338.00 351.50 194.50 139.50 56.38 a 5.00 0.00 3.00 127.50 150.52 a 329.50 1971.81
1970 359.50 236.50 248.50 237.00 136.00 58.50 6.50 0.00 b 31.50 91.50 202.76 a 365.00 1973.26
1971 386.50 320.96 a 343.50 251.00 210.00 122.50 8.50 0.00 11.50 153.00 285.50 437.00 2529.96
1972 470.50 323.00 249.00 208.50 112.50 21.00 2.58 a 0.50 7.00 64.50 235.50 328.50 2023.08
1973 406.50 255.00 332.50 0.00 z 160.00 45.50 7.50 0.50 22.00 109.50 248.00 329.00 1916.00
1974 367.00 337.00 307.50 233.00 153.50 56.00 14.00 1.50 8.00 58.50 202.00 382.50 2120.50
1975 391.50 361.00 359.50 308.50 205.50 112.50 17.00 13.50 1.50 104.50 248.50 381.50 2505.00
1976 324.50 260.00 286.50 246.50 117.50 44.00 1.00 2.50 0.00 25.50 125.00 268.50 1701.50
1977 280.00 214.50 337.50 197.59 a 173.50 47.00 10.00 0.00 8.50 31.50 146.50 171.50 1618.09
1978 239.00 232.50 157.00 174.00 90.00 17.00 8.00 6.00 7.50 17.00 224.00 421.00 1593.00
1979 356.50 341.50 267.50 193.50 96.50 35.50 10.50 0.00 0.00 51.00 209.50 249.50 1811.50
1980 220.50 174.52 a 249.00 161.00 153.45 a 84.00 3.00 0.00 4.50 51.50 189.00 273.83 a 1564.30
1981 256.00 187.00 250.50 140.50 65.50 1.50 0.00 0.00 0.00 86.50 167.00 274.50 1429.00
1982 328.00 183.00 210.50 149.00 61.48 a 37.50 3.00 0.00 4.50 22.00 161.50 317.50 1477.98
1983 212.50 198.00 166.00 168.50 73.00 18.50 0.00 0.00 0.00 4.00 124.50 214.50 1179.50
1984 202.50 236.00 163.50 133.00 45.00 16.00 0.00 0.00 0.00 36.00 195.00 323.00 1350.00
1985 321.00 287.00 304.50 124.50 53.00 11.38 a 0.00 0.00 0.00 16.50 193.00 236.00 1546.88
1986 132.00 182.50 131.50 114.00 48.10 b 1.00 0.00 d 0.00 15.50 13.20 d 84.00 233.50 955.31
1987 311.50 214.00 209.50 88.00 31.00 6.00 1.50 0.00 0.00 1.00 109.00 368.00 1339.50
1988 269.50 156.00 146.50 104.50 58.50 34.00 0.00 0.00 3.50 7.00 153.50 266.00 1199.00
1989 312.50 247.50 182.00 55.50 55.00 22.00 0.00 0.00 0.00 18.50 0.00 z 182.50 1075.50
1990 262.50 276.50 123.50 k 65.50 50.50 4.50 0.00 0.00 0.00 5.50 106.00 279.50 1050.50
1991 252.50 163.50 258.50 123.00 119.00 34.00 0.50 0.00 1.00 30.00 0.00 z 244.00 1226.00
1992 211.00 132.50 162.50 20.00 0.00 2.00 1.00 0.00 0.00 3.00 104.50 0.00 z 636.50
1993 239.00 189.00 103.00 57.50 11.50 8.50 0.00 0.00 0.50 7.50 98.00 240.00 954.50
1994 203.50 257.00 137.00 126.00 101.50 5.50 0.00 0.00 0.50 23.50 244.50 300.50 1399.50
1995 244.50 98.50 119.00 110.00 102.00 20.50 0.00 0.00 0.00 12.00 79.50 235.50 1021.50
1996 214.00 152.00 164.00 67.00 10.50 0.00 0.00 0.00 0.00 d 51.50 118.50 216.50 994.00
1997 214.00 197.50 96.50 85.50 0.00 1.00 0.00 0.00 0.00 7.50 76.50 235.50 914.00
1998 0.00 z 217.50 173.00 184.00 0.00 z 0.00 z 0.00 0.00 0.00 31.00 a 154.00 303.50 1063.00
1999 270.00 257.00 302.00 216.67 c 125.50 58.89 c 1.00 0.52 a 61.50 t 2.50 j 95.00 h 204.00 f 1231.57
2000 229.73 c 120.00 i 218.79 e 88.97 a 27.68 c 5.00 c 0.00 c 0.00 b 0.00 a 36.54 c 165.00 h 235.37 d 842.07
2001 340.00 272.46 b 189.50 190.18 b 51.84 b 6.00 0.00 a 0.00 b 0.00 b 7.48 b 162.78 c 306.42 e 1526.67
2002 315.17 d 142.00 n 137.00 p 208.00 164.00 26.00 2.50 0.00 0.50 j 41.00 84.50 279.50 1120.67
2003 116.00 208.00 254.56 e 147.50 i 73.50 j 8.00 o 0.00 q 0.00 t 0.00 z 5.00 f 155.40 e 0.00 z 733.96
2004 203.50 j 190.00 i 83.50 p 3.50 y 17.88 e 4.00 f 0.00 k 0.00 m 0.00 o 25.50 m 215.50 129.50 p 233.38
2005 171.00 i 178.50 107.50 k 98.00 j 32.50 i 5.00 g 0.00 g 0.00 j 0.00 m 0.00 z 52.00 m 103.50 q 178.50
2006 180.00 m 211.22 e 0.00 z 100.50 i 26.50 n 0.50 o 0.00 p 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 211.22
Period of Record Statistics
MEAN 313.48 256.31 244.76 175.82 104.87 44.04 5.59 2.02 7.82 51.99 173.47 310.69 1679.63
S.D. 99.34 74.37 79.41 73.26 62.51 39.83 10.27 4.51 11.06 42.94 59.06 72.16 497.55
SKEW 0.47 0.13 -0.16 -0.10 -0.01 0.78 3.16 2.36 1.52 0.74 0.12 0.13 0.15
MAX 586.00 425.50 372.00 334.50 213.00 124.50 50.00 18.00 43.00 153.00 285.50 455.00 2529.96
MIN 116.00 98.50 96.50 20.00 0.00 0.00 0.00 0.00 0.00 1.00 76.50 171.50 914.00
NO YRS 44 48 43 45 43 42 43 44 42 43 43 43 31