OROVILLE, CALIFORNIA

Monthly Total Heating Degree Days

(046521)

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
1953 0.00 z 0.00 z 0.00 z 35.00 u 148.50 29.00 0.00 2.00 0.00 130.50 309.00 525.50 1144.50
1954 573.00 466.00 435.50 141.50 30.00 23.00 0.00 1.00 2.50 100.00 400.50 686.00 2859.00
1955 732.00 507.50 349.00 324.50 83.38 b 5.50 0.00 0.00 18.50 63.50 384.00 512.05 c 2979.93
1956 539.00 383.00 j 353.00 203.00 67.50 2.50 0.00 0.00 0.00 143.00 347.00 631.00 2286.00
1957 676.00 375.00 322.50 195.00 81.00 0.50 0.00 i 0.00 c 2.50 g 162.00 425.00 626.00 2863.00
1958 589.00 313.50 463.00 210.50 25.50 3.50 0.00 0.00 6.50 36.50 281.00 406.10 a 2335.10
1959 495.00 446.50 271.50 62.50 74.00 0.00 0.00 2.00 16.00 43.06 d 299.00 574.00 2283.56
1960 603.50 430.50 292.00 196.00 100.00 0.00 0.00 0.00 0.00 57.50 318.75 b 567.50 2565.75
1961 656.17 a 365.50 362.50 152.50 76.50 0.00 0.00 0.00 4.00 106.50 350.50 622.00 2696.17
1962 623.00 457.00 398.50 83.50 59.50 1.00 0.00 0.00 d 1.00 77.50 258.00 564.00 2523.00
1963 710.93 a 219.50 381.50 323.00 66.00 1.00 0.00 0.00 0.00 65.50 379.50 734.00 2880.93
1964 615.00 404.50 381.00 191.50 93.50 23.50 0.00 z 0.00 z 8.00 40.50 424.50 438.00 2620.00
1965 590.00 416.50 297.00 201.50 63.50 7.50 0.00 0.00 14.50 30.00 281.38 a 702.00 2603.88
1966 563.50 467.00 307.00 70.50 6.50 8.50 0.00 3.00 1.00 48.64 b 277.50 565.50 2318.64
1967 562.00 432.00 358.00 424.00 85.50 33.50 0.00 0.00 0.00 29.50 223.50 561.50 2709.50
1968 637.00 277.00 277.00 139.00 53.00 0.50 0.00 4.00 5.00 84.50 370.50 647.00 2494.50
1969 646.50 495.00 359.00 199.00 16.50 0.00 0.00 0.00 0.00 115.00 292.00 461.00 2584.00
1970 439.50 333.50 278.50 237.50 39.00 10.50 0.00 0.00 5.00 132.00 273.50 589.50 2338.50
1971 580.00 462.50 367.50 221.00 91.00 14.50 0.00 0.00 18.00 197.00 350.00 652.50 2954.00
1972 699.00 387.50 186.50 178.50 58.00 9.50 0.00 0.00 8.00 108.00 427.00 0.00 z 2062.00
1973 606.00 356.00 416.00 121.00 16.50 0.00 0.00 0.00 3.50 84.00 376.50 521.50 2501.00
1974 559.50 440.00 319.50 234.31 a 49.00 0.00 1.00 0.00 0.00 40.00 364.14 a 596.00 2603.45
1975 640.00 438.50 390.00 328.50 52.50 6.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 1855.50
1976 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
1977 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
1978 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
1979 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
1980 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
1981 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
1982 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 375.50 f 534.75 a 534.75
1983 648.33 b 363.50 348.00 288.00 98.50 0.54 b 0.00 0.00 0.00 26.00 372.50 509.00 2654.36
1984 559.00 424.50 210.50 281.25 b 67.00 5.77 d 0.00 0.00 10.50 214.00 0.00 z 570.00 2342.52
1985 737.00 374.00 423.00 126.00 91.89 c 11.00 0.00 a 0.00 44.00 145.50 471.00 714.72 d 3138.11
1986 499.50 320.00 219.50 234.64 b 76.50 0.00 0.00 0.00 106.55 a 91.00 302.00 576.17 b 2425.87
1987 615.50 404.00 328.50 67.50 37.00 0.00 0.50 0.00 23.00 23.50 0.00 z 553.50 2053.00
1988 554.50 0.00 z 0.00 z 140.50 137.00 0.00 z 0.00 z 1.00 15.00 56.50 406.50 582.00 1893.00
1989 217.50 s 472.50 311.50 93.50 58.50 0.00 z 0.00 0.00 42.50 192.50 347.50 667.00 2185.50
1990 506.50 f 538.00 311.50 115.00 0.00 z 7.00 0.00 4.00 6.00 54.00 403.50 745.50 2184.50
1991 591.00 315.00 524.00 268.00 133.82 a 11.00 0.00 2.50 1.50 97.00 326.00 611.50 2881.32
1992 694.00 324.00 290.50 134.50 0.00 20.00 0.00 0.00 0.00 44.50 315.50 632.50 2455.50
1993 592.50 443.50 193.00 197.00 38.00 23.00 0.00 0.00 8.50 63.50 385.50 619.50 2564.00
1994 540.00 473.50 240.50 155.00 49.00 2.50 0.00 0.00 8.00 128.50 564.50 719.50 2881.00
1995 525.50 392.50 426.25 a 329.50 160.00 84.00 g 0.00 1.50 15.00 88.00 214.00 430.00 2582.25
1996 528.00 350.50 306.00 199.50 57.50 0.00 z 0.00 0.00 9.50 163.50 348.00 535.50 2498.00
1997 538.00 431.50 255.50 149.50 12.92 a 0.50 0.00 0.00 1.50 79.88 e 227.00 484.12 a 2180.42
1998 485.50 420.50 298.50 243.50 143.50 8.50 0.00 b 0.00 25.50 116.00 370.50 638.00 2750.00
1999 90.00 z 228.00 n 240.00 m 105.00 n 22.50 y 17.50 j 0.00 o 0.00 f 0.00 r 53.50 g 251.50 h 227.00 q 0.00
2000 371.50 j 141.50 s 103.50 t 33.50 q 6.00 w 3.00 n 0.00 o 0.00 f 1.50 r 44.50 t 264.00 l 275.50 o 0.00
2001 327.50 n 439.60 c 221.13 a 233.79 a 0.52 a 0.00 g 0.00 f 0.00 d 0.00 a 5.50 l 189.00 i 314.50 k 895.04
2002 589.57 d 368.48 c 361.67 a 163.45 a 62.50 0.00 0.00 0.00 12.50 109.50 296.50 482.00 2446.17
2003 376.00 0.00 z 34.00 z 211.00 i 101.61 d 0.00 0.00 i 0.00 0.00 14.00 l 408.00 530.00 1415.61
2004 593.00 430.00 180.00 119.00 10.00 0.00 g 0.00 0.00 14.50 138.95 c 408.00 551.50 2444.95
2005 476.00 g 354.50 248.50 224.50 76.50 0.00 z 0.00 f 0.00 3.00 93.00 285.00 489.44 e 1774.44
2006 479.50 387.00 475.85 a 242.07 a 16.05 c 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1600.47
Period of Record Statistics
MEAN 587.05 402.88 327.14 196.37 65.11 7.29 0.04 0.49 10.92 93.17 346.61 579.97 2615.10
S.D. 77.50 65.29 80.98 80.12 40.38 9.18 0.18 1.08 18.39 49.62 71.01 83.66 240.37
SKEW -0.25 -0.47 0.18 0.51 0.44 1.34 4.66 2.18 3.69 0.60 0.45 0.06 0.28
MAX 737.00 538.00 524.00 424.00 160.00 33.50 1.00 4.00 106.55 214.00 564.50 745.50 3138.11
MIN 376.00 219.50 180.00 62.50 0.00 0.00 0.00 0.00 0.00 23.50 214.00 406.10 2180.42
NO YRS 40 41 42 43 44 37 38 43 42 41 40 42 27