TRACY PUMPING PLANT, CALIFORNIA

Monthly Total Heating Degree Days

(049001)

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
1955 0.00 z 475.50 319.50 302.59 a 56.50 t 38.00 0.00 c 0.00 z 0.00 z 49.60 a 346.00 448.00 1979.19
1956 498.50 497.00 342.11 c 204.00 83.00 i 7.24 a 0.00 6.50 0.50 103.00 337.00 594.00 2589.85
1957 652.00 347.00 280.00 146.00 g 91.89 c 7.50 0.00 a 0.00 a 0.00 60.50 j 350.50 575.00 2303.89
1958 592.21 b 318.00 457.77 a 182.00 29.00 4.50 2.77 c 0.00 0.00 24.00 282.00 448.00 2340.24
1959 489.50 421.50 225.50 36.00 67.50 10.50 0.00 0.00 4.50 17.00 336.00 565.50 2173.50
1960 590.00 406.00 243.50 166.50 70.50 0.00 0.00 0.00 0.50 52.50 346.00 640.00 2515.50
1961 701.00 326.50 318.50 174.00 67.00 o 9.00 e 0.00 0.00 2.00 100.50 408.00 639.00 2678.50
1962 730.50 494.50 406.50 95.00 50.50 p 13.20 e 0.00 c 0.00 0.50 90.50 263.57 b 604.50 2698.77
1963 728.50 214.00 346.50 308.50 56.50 g 7.00 1.00 0.00 0.00 b 46.00 398.00 751.50 2801.00
1964 589.00 414.00 361.31 b 151.80 e 104.76 b 29.48 a 3.88 c 3.00 6.50 41.50 428.00 454.50 2587.73
1965 587.00 413.00 321.00 229.66 a 67.50 34.50 0.00 0.00 17.59 a 27.00 298.50 730.00 2725.74
1966 607.00 479.50 311.55 a 73.50 48.00 16.50 2.00 0.00 3.00 64.50 310.00 584.00 2499.55
1967 577.50 458.50 378.50 435.50 102.50 45.00 0.00 0.00 0.00 28.50 245.50 657.00 2928.50
1968 666.50 298.00 282.00 150.50 115.22 a 17.00 3.21 b 6.72 a 20.17 a 77.50 368.00 636.50 2641.31
1969 592.10 a 477.00 356.50 213.00 43.40 a 24.23 d 0.00 0.00 0.00 124.00 348.50 489.50 2668.23
1970 451.50 347.50 282.50 242.07 a 53.22 a 9.50 0.00 0.00 0.00 123.50 283.50 566.50 2359.79
1971 611.50 442.50 345.00 237.50 111.50 25.00 0.00 a 0.00 b 18.00 179.50 338.50 643.25 a 2952.25
1972 731.00 371.00 134.00 136.50 50.50 9.00 0.00 e 1.55 a 2.50 107.50 417.50 683.00 2644.05
1973 605.00 370.50 411.50 152.00 34.50 12.50 0.50 0.53 b 0.00 72.50 336.50 530.50 2526.53
1974 554.00 440.00 296.50 209.50 72.69 b 8.57 b 4.00 0.00 0.00 52.00 356.00 591.00 2584.26
1975 635.00 387.50 363.50 317.00 71.50 16.00 5.00 0.00 e 0.00 133.50 379.00 574.53 a 2882.53
1976 574.00 384.50 295.02 a 196.00 31.00 22.50 0.00 0.50 1.00 36.00 284.00 593.50 2418.02
1977 650.00 331.15 b 329.50 56.00 160.00 7.24 a 1.50 0.00 a 7.50 31.52 a 250.50 431.42 a 2256.33
1978 476.00 363.00 201.00 212.50 34.50 0.50 0.00 b 0.00 1.00 g 49.50 397.00 691.50 2425.50
1979 586.50 428.50 310.00 170.50 36.50 5.50 1.03 a 0.00 1.00 51.31 b 354.50 530.00 2475.34
1980 491.50 346.50 321.00 163.45 a 92.00 23.00 0.00 0.00 a 3.21 b 83.50 263.00 552.00 2339.16
1981 514.00 335.00 336.87 a 138.10 a 24.50 0.00 c 0.00 0.00 2.00 103.50 249.00 445.50 2148.47
1982 689.50 357.50 392.50 212.50 39.00 44.00 0.50 0.00 7.00 62.50 459.00 537.50 2801.50
1983 649.00 373.50 316.50 248.50 79.00 0.50 1.50 0.00 0.00 4.00 323.00 431.00 2426.50
1984 564.00 421.00 190.50 179.50 33.00 6.50 2.50 0.00 0.00 108.50 354.00 628.50 2488.00
1985 729.00 381.00 409.50 76.00 71.00 10.50 0.00 0.00 19.50 73.00 0.00 z 715.00 2484.50
1986 438.00 301.50 204.50 167.50 58.00 2.00 0.00 0.00 37.50 52.50 265.00 650.00 2176.50
1987 611.50 379.00 326.00 64.50 55.59 b 9.31 a 2.67 b 0.00 0.00 17.00 q 177.00 m 228.50 q 1448.57
1988 275.50 p 249.00 l 165.50 j 87.00 n 70.50 n 28.00 i 0.00 o 0.00 i 0.00 n 18.00 l 187.00 l 427.00 j 0.00
1989 415.50 l 319.50 j 272.50 104.00 38.20 c 5.50 0.00 k 0.00 4.50 n 68.50 j 316.00 380.00 m 736.20
1990 324.50 m 321.00 i 226.00 38.50 i 29.00 k 6.50 j 0.00 0.00 i 0.00 a 18.50 226.00 i 487.00 i 244.50
1991 394.50 j 171.00 k 404.50 146.50 i 110.64 b 18.50 k 0.50 1.00 j 3.00 j 76.00 154.00 m 342.50 n 591.64
1992 341.50 n 318.50 239.00 34.50 o 0.00 3.00 0.00 a 0.00 i 0.00 a 8.00 173.50 m 349.50 k 568.50
1993 597.50 419.50 189.50 154.50 24.50 m 6.50 o 0.00 0.00 4.00 j 30.50 348.50 630.00 2370.00
1994 603.00 469.00 251.00 136.15 d 73.00 5.00 0.00 0.00 0.00 58.50 438.00 610.50 2644.15
1995 411.00 345.00 343.00 193.00 101.00 23.50 0.50 0.00 10.00 14.00 118.50 388.00 1947.50
1996 469.00 320.50 230.50 97.00 11.00 0.00 0.00 0.00 0.00 100.00 261.50 434.50 1924.00
1997 496.00 309.00 170.50 73.00 4.00 8.00 0.00 0.00 l 0.00 38.00 237.00 588.00 1923.50
1998 484.50 399.00 283.50 205.50 156.00 11.50 0.00 0.00 7.00 55.00 285.00 640.15 a 2527.15
1999 588.00 403.50 374.58 a 190.50 82.00 21.50 0.00 0.00 0.00 23.50 250.50 505.50 2439.58
2000 426.50 333.00 232.50 87.50 62.50 4.00 0.00 0.00 4.00 84.50 439.00 520.50 2194.00
2001 580.00 404.00 176.50 207.50 1.50 0.00 0.00 0.00 0.00 23.50 233.00 508.00 2134.00
2002 579.00 356.50 322.50 136.00 55.00 0.00 0.00 0.00 1.50 60.50 277.50 472.50 2261.00
2003 455.50 369.50 197.00 251.00 65.50 1.00 0.00 0.00 0.00 18.00 358.50 482.00 2198.00
2004 551.50 405.00 130.00 98.00 14.00 0.00 0.00 0.00 10.00 101.50 374.50 527.50 2212.00
2005 587.00 321.00 238.00 143.50 32.50 13.00 0.00 0.00 0.00 31.50 216.00 440.00 2022.50
2006 454.50 354.50 443.50 212.50 24.80 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1489.80
Period of Record Statistics
MEAN 574.90 381.85 296.89 174.29 60.91 12.17 0.67 0.42 4.15 61.96 322.87 563.53 2430.38
S.D. 86.09 59.34 79.26 76.89 37.51 11.71 1.26 1.44 7.57 38.41 69.68 90.66 266.72
SKEW 0.00 -0.05 -0.15 0.77 0.63 1.23 1.91 3.76 2.58 0.74 -0.29 0.02 0.08
MAX 731.00 497.00 457.77 435.50 160.00 45.00 5.00 6.72 37.50 179.50 459.00 751.50 2952.25
MIN 411.00 214.00 130.00 36.00 0.00 0.00 0.00 0.00 0.00 4.00 118.50 388.00 1924.00
NO YRS 46 48 51 47 44 47 49 45 45 47 45 45 35