GRASS VALLEY NO 2, CALIFORNIA

Monthly Total Heating Degree Days

(043573)

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
1966 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 209.00 455.50 652.50 1317.00
1967 656.50 519.50 639.00 738.50 250.50 144.00 0.00 0.00 4.00 205.00 360.50 781.50 4299.00
1968 721.50 511.00 507.50 368.00 262.50 56.50 0.00 71.00 40.00 247.50 512.50 783.00 4081.00
1969 726.50 729.00 577.00 434.50 145.50 71.50 0.00 0.50 29.00 345.00 403.00 627.50 4089.00
1970 633.00 472.00 514.50 520.50 172.05 a 90.50 0.00 0.00 53.00 253.50 460.50 781.00 3950.55
1971 656.00 548.00 601.50 468.50 329.00 109.00 2.50 1.00 95.00 365.00 531.00 855.00 4561.50
1972 719.50 562.50 410.00 424.00 212.50 57.50 10.00 17.00 104.00 276.50 597.50 857.50 4248.50
1973 795.00 555.50 676.00 340.50 141.50 52.00 1.50 18.00 64.00 266.50 623.50 649.00 4183.00
1974 735.00 624.00 567.00 496.00 208.00 28.00 39.50 3.00 2.50 144.00 493.00 724.50 4064.50
1975 654.50 634.00 668.50 634.00 211.00 63.50 28.00 29.50 2.50 356.00 560.50 615.00 4457.00
1976 666.00 610.50 664.00 569.00 150.50 128.00 11.50 96.00 73.50 202.50 357.00 622.00 4150.50
1977 726.00 504.00 690.00 325.50 465.00 48.50 11.50 5.00 125.50 203.50 503.00 609.50 4217.00
1978 644.00 585.50 441.00 523.50 255.50 108.00 23.00 36.50 130.86 a 147.00 639.50 810.00 4344.36
1979 809.00 672.50 575.50 449.50 204.50 66.50 30.50 31.00 18.50 258.50 558.00 608.50 4282.50
1980 634.50 536.50 642.50 421.00 315.00 191.50 33.00 13.50 59.00 267.00 482.50 589.00 4185.00
1981 594.00 527.00 615.50 371.00 218.50 41.00 3.00 6.00 64.50 387.00 473.00 627.00 3927.50
1982 848.50 554.50 671.00 528.00 215.50 142.00 34.00 10.50 139.50 319.50 600.00 734.50 4797.50
1983 633.00 562.50 600.50 543.50 264.00 60.00 75.50 11.50 51.50 196.50 599.50 681.00 4279.00
1984 615.50 633.00 487.00 485.00 185.50 99.00 1.50 6.00 40.50 422.00 634.50 800.00 4409.50
1985 735.50 582.00 711.00 295.00 267.50 55.50 9.00 28.00 178.00 289.00 643.50 633.00 4427.00
1986 540.50 504.50 413.50 427.24 a 250.00 38.00 10.00 0.00 253.00 238.50 287.00 i 660.00 3335.24
1987 766.50 577.00 572.50 248.00 182.00 46.00 60.00 22.00 60.50 164.50 521.50 765.50 3986.00
1988 693.50 437.50 486.00 392.00 324.50 123.50 4.50 9.00 54.00 114.50 565.50 725.00 3929.50
1989 759.00 690.00 558.00 312.00 274.50 54.50 11.00 33.00 94.00 276.50 420.50 577.00 4060.00
1990 695.00 705.50 492.50 275.00 242.50 79.50 4.00 30.00 31.50 179.50 502.00 833.50 4070.50
1991 675.00 414.50 715.00 466.00 345.00 103.50 0.00 10.50 9.50 164.50 432.00 637.50 3973.00
1992 652.50 505.50 477.50 272.50 50.50 75.50 21.00 6.50 18.50 166.50 502.00 777.50 3526.00
1993 757.50 648.50 446.00 438.00 238.00 119.50 3.00 19.00 52.50 186.00 529.50 681.50 4119.00
1994 633.50 664.50 478.00 388.00 230.00 76.00 0.00 0.00 55.00 284.50 713.00 756.50 4279.00
1995 658.00 434.00 622.00 487.00 311.00 162.50 14.50 10.00 37.00 169.50 330.00 622.50 3858.00
1996 659.00 522.50 523.50 370.00 233.00 38.00 0.00 0.00 64.50 307.00 486.00 638.50 3842.00
1997 680.00 562.00 433.50 363.50 106.00 50.50 13.50 3.50 35.50 307.50 475.50 701.50 3732.50
1998 672.50 663.00 547.00 503.50 450.00 113.50 1.00 2.00 87.00 318.00 597.50 763.00 4718.00
1999 667.00 647.00 649.00 451.00 249.00 100.50 17.00 19.50 17.00 143.50 432.50 649.00 4042.00
2000 684.00 601.50 534.50 322.00 233.00 47.00 20.50 4.00 88.50 0.00 z 632.50 611.00 3778.50
2001 737.50 669.50 445.50 506.50 60.50 35.00 4.00 1.00 17.50 154.00 448.00 732.50 3811.50
2002 782.00 554.00 598.50 386.00 242.00 11.50 0.00 7.00 53.00 269.00 429.50 697.00 4029.50
2003 537.50 613.00 532.00 587.00 275.00 21.00 0.00 3.50 13.00 110.50 642.50 707.00 4042.00
2004 736.50 657.00 340.00 328.00 186.50 26.50 0.00 0.50 65.50 298.00 583.50 656.50 3878.50
2005 733.00 524.50 501.00 471.00 255.00 129.00 0.00 0.00 87.50 251.50 0.00 z 0.00 z 2952.50
2006 683.00 567.50 758.50 448.39 b 125.66 c 33.33 c 0.00 n 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2616.39
Period of Record Statistics
MEAN 690.16 577.16 559.58 434.45 233.44 77.42 12.77 14.49 63.33 242.67 519.25 698.29 4134.75
S.D. 66.57 76.27 97.89 104.11 84.66 42.49 17.23 19.74 51.00 78.08 91.39 78.70 265.43
SKEW 0.00 -0.09 -0.03 0.49 0.41 0.69 1.92 2.48 1.61 0.26 -0.05 0.41 0.38
MAX 848.50 729.00 758.50 738.50 465.00 191.50 75.50 96.00 253.00 422.00 713.00 857.50 4797.50
MIN 537.50 414.50 340.00 248.00 50.50 11.50 0.00 0.00 2.50 110.50 330.00 577.00 3526.00
NO YRS 40 40 40 40 40 40 39 39 39 39 38 39 36