POTTER VALLEY P H, CALIFORNIA

Monthly Total Heating Degree Days

(047109)

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 14.00 1.00 58.00 138.50 447.50 757.50 1416.50
1949 817.00 596.50 478.00 193.50 133.00 14.00 0.00 1.50 8.50 196.00 246.50 655.50 3340.00
1950 801.50 458.00 474.82 a 266.00 155.00 62.50 0.00 1.00 21.00 168.00 287.50 475.50 3170.82
1951 613.50 491.50 450.50 227.00 161.00 22.50 6.00 9.50 5.50 187.50 403.50 638.00 3216.00
1952 738.00 528.50 543.00 237.50 127.50 85.50 0.00 0.00 19.00 80.50 452.50 612.50 3424.50
1953 508.50 422.50 465.50 338.28 a 288.50 157.20 e 0.00 e 8.00 i 13.97 a 154.50 g 390.00 b 462.00 f 2584.44
1954 640.09 d 395.92 c 499.21 b 236.67 c 72.00 i 105.50 0.00 h 6.50 p 55.00 127.50 i 389.44 c 384.00 k 2321.83
1955 487.00 i 357.50 i 322.00 i 322.00 i 124.00 f 51.35 d 16.00 h 1.50 k 34.62 d 144.87 e 494.42 d 540.84 c 1266.09
1956 586.13 d 598.00 426.85 e 242.50 f 176.59 c 48.00 e 0.00 c 0.00 g 17.00 l 153.00 t 169.50 q 524.00 f 1835.57
1957 752.78 a 423.63 a 444.00 272.50 165.52 c 24.00 f 0.00 i 13.50 29.48 a 253.37 e 324.50 i 410.00 i 2354.78
1958 412.00 i 406.00 d 439.00 g 238.50 j 52.50 h 20.50 i 0.00 i 0.00 f 23.79 a 83.91 b 372.41 a 345.50 g 886.12
1959 278.50 n 369.50 h 228.50 l 150.56 c 167.00 g 40.34 a 2.07 a 0.00 y 7.00 x 59.50 h 351.60 e 433.50 h 544.57
1960 662.92 e 501.37 c 217.50 j 247.50 h 143.50 j 0.00 l 0.00 i 0.50 l 2.50 i 115.50 i 312.50 j 443.50 g 1164.29
1961 527.57 d 342.00 g 488.85 e 209.50 g 161.00 l 10.00 k 2.50 l 0.00 i 16.50 l 143.00 i 315.00 h 439.50 i 1016.42
1962 456.50 f 405.50 g 532.96 e 158.50 h 164.50 j 8.50 i 0.00 l 4.00 j 17.50 j 154.00 h 267.00 j 313.50 k 532.96
1963 517.50 g 210.50 h 388.50 h 361.00 g 124.50 h 0.00 z 17.00 n 5.50 h 3.50 h 123.00 j 348.00 h 373.00 l 0.00
1964 537.00 h 339.50 i 299.50 n 231.00 m 157.00 j 33.00 l 2.00 i 9.00 i 17.00 j 64.50 l 374.50 h 624.77 e 624.77
1965 461.50 h 353.50 g 270.50 l 294.00 e 159.00 g 24.00 l 0.00 m 0.00 l 17.50 g 60.00 k 301.00 h 408.00 m 294.00
1966 482.00 g 420.00 g 313.00 f 103.00 h 52.00 j 48.50 i 9.00 i 0.00 r 11.50 o 105.00 l 238.00 l 428.00 h 0.00
1967 418.50 j 300.00 g 400.00 i 459.00 g 103.00 m 44.00 k 0.00 n 0.00 n 0.00 m 106.00 h 242.00 h 529.50 i 0.00
1968 526.50 g 378.81 e 246.50 k 258.89 c 181.98 d 23.00 j 0.52 a 24.28 a 31.00 170.50 418.50 713.50 2177.98
1969 676.00 596.00 446.06 d 340.00 65.50 29.48 a 0.00 0.50 14.50 192.00 368.00 527.50 3255.54
1970 533.50 367.00 363.50 421.50 112.50 33.21 b 0.00 1.00 20.50 181.50 360.50 629.00 3023.71
1971 559.50 440.00 476.50 377.50 182.00 54.50 6.00 8.00 56.00 243.87 a 428.50 714.50 3546.87
1972 631.37 a 445.36 a 328.50 339.00 132.00 39.50 0.00 18.00 58.50 201.50 451.50 315.00 q 2645.22
1973 658.75 c 432.50 516.50 235.56 c 112.12 a 36.50 0.00 15.50 15.50 o 121.00 h 481.61 b 0.00 z 2489.03
1974 648.02 e 531.50 424.18 a 352.00 179.50 22.00 17.00 2.00 0.00 d 129.50 426.00 570.40 a 3302.10
1975 568.85 a 525.00 515.63 a 466.03 a 137.43 a 43.97 a 15.00 3.50 5.50 246.00 487.50 549.50 3563.92
1976 586.00 488.00 512.00 397.50 125.00 87.00 6.50 40.50 31.00 131.50 258.50 569.50 3233.00
1977 597.50 386.50 524.42 a 251.50 350.82 a 14.50 10.50 7.00 61.50 178.00 465.00 c 0.00 z 2847.23
1978 506.33 d 401.50 304.50 362.50 146.50 27.50 8.94 e 10.00 43.50 76.50 455.89 b 634.50 2978.17
1979 642.50 528.00 392.00 347.00 127.00 37.00 6.00 6.00 7.50 172.10 b 341.00 g 334.00 l 2265.10
1980 556.50 404.00 471.50 318.00 232.50 143.50 0.00 z 1.50 35.00 206.50 439.29 b 551.00 3359.29
1981 534.00 430.50 445.50 287.00 159.00 30.00 0.00 4.00 42.00 279.00 b 0.00 z 512.00 2723.00
1982 694.50 434.00 505.50 354.00 119.00 57.00 11.50 0.00 59.50 207.00 522.50 629.50 3594.00
1983 558.50 444.00 499.50 428.50 177.50 33.50 29.00 2.00 14.00 112.50 472.00 565.00 3336.00
1984 506.50 510.00 355.00 387.50 160.00 64.00 4.50 1.00 30.50 307.00 517.50 699.00 3542.50
1985 635.50 444.50 547.00 180.50 201.50 28.50 2.00 3.00 88.50 217.50 555.50 579.00 3483.00
1986 509.50 402.00 304.00 314.50 0.00 z 5.50 o 1.00 0.00 193.00 179.00 451.00 618.50 2972.50
1987 673.50 481.00 511.00 223.50 127.00 16.50 23.50 1.50 29.50 103.50 451.50 664.50 3306.50
1988 661.00 412.00 378.00 303.00 274.00 106.50 0.00 z 0.00 z 22.50 95.00 466.11 c 620.50 3338.61
1989 652.00 0.00 z 452.50 0.00 z 219.58 a 39.50 16.50 19.00 59.00 231.50 424.00 620.00 2733.58
1990 670.00 607.50 411.00 199.50 230.50 68.50 5.50 9.00 16.07 b 138.00 502.00 840.50 3698.07
1991 613.00 369.00 602.00 382.50 257.50 81.00 0.00 7.00 0.50 124.00 406.50 663.00 3506.00
1992 652.50 431.00 388.50 254.50 40.00 70.00 6.50 3.00 i 6.50 125.00 440.00 723.50 3138.00
1993 701.00 555.00 326.50 372.00 195.00 92.50 8.50 8.00 28.00 141.00 509.00 687.50 3624.00
1994 606.00 558.00 379.00 306.00 163.00 80.00 0.00 0.50 38.00 254.00 651.00 742.50 3778.00
1995 574.00 384.00 488.00 372.50 185.50 114.00 9.00 9.50 31.00 136.50 304.50 546.50 3155.00
1996 597.50 432.50 350.00 277.50 161.50 23.50 2.00 1.00 22.50 230.00 437.00 576.00 3111.00
1997 577.50 455.00 375.50 279.50 80.00 39.50 3.00 0.00 12.50 218.50 360.50 633.50 3035.00
1998 548.00 534.00 422.00 364.50 340.00 17.50 1.00 0.00 30.50 241.50 492.50 719.00 3710.50
1999 628.00 620.00 544.50 339.00 212.00 75.50 11.00 12.40 a 7.50 134.50 375.00 636.00 3595.40
2000 612.00 472.50 412.50 241.55 a 182.00 25.50 2.58 a 0.50 41.00 209.00 536.50 622.00 3357.64
2001 706.50 535.00 316.00 390.50 44.50 44.00 0.00 0.00 11.00 102.00 440.50 608.00 3198.00
2002 687.00 434.50 451.50 259.00 177.00 10.00 0.00 6.50 41.50 198.00 386.00 599.00 3250.00
2003 465.50 476.50 384.00 458.00 168.00 22.50 0.00 0.50 11.50 96.50 521.50 620.00 3224.50
2004 609.50 510.00 212.50 235.00 115.50 0.00 z 0.00 3.00 34.50 208.00 469.00 577.00 2974.00
2005 645.50 407.00 360.00 332.50 156.50 86.00 0.00 0.00 43.00 171.50 424.00 441.50 h 2626.00
2006 598.00 464.50 619.00 339.50 94.03 a 14.46 b 0.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2129.50
Period of Record Statistics
MEAN 619.36 469.79 439.99 309.89 167.38 53.23 5.22 6.02 32.92 174.27 434.60 626.65 3364.13
S.D. 75.93 68.71 83.79 74.13 65.82 35.01 6.90 8.12 30.74 56.82 76.85 73.84 220.21
SKEW 0.39 0.55 -0.27 0.03 0.71 1.08 1.59 2.28 3.14 0.14 -0.18 0.54 0.11
MAX 817.00 620.00 619.00 466.03 350.82 157.20 29.00 40.50 193.00 307.00 651.00 840.50 3778.00
MIN 465.50 367.00 212.50 150.56 40.00 10.00 0.00 0.00 0.00 76.50 246.50 475.50 2978.17
NO YRS 48 48 48 47 45 45 44 42 47 45 46 40 29