TRINITY RIVER HATCHERY, CALIFORNIA

Monthly Total Heating Degree Days

(049026)

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
1974 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 9.50 19.50 279.00 572.00 0.00 z 880.00
1975 860.50 713.00 700.00 619.50 216.00 65.50 24.50 32.50 5.50 381.00 661.00 766.50 5045.50
1976 789.50 678.00 627.50 514.50 177.50 117.50 16.00 55.50 45.50 235.50 484.50 791.00 4532.50
1977 837.50 530.50 683.00 311.50 403.50 21.00 5.50 12.00 97.50 244.50 616.50 693.00 4456.00
1978 647.50 576.00 424.00 464.00 235.00 58.00 8.50 45.50 147.50 181.00 669.50 894.00 4350.50
1979 851.50 682.00 525.00 423.50 184.50 50.00 7.00 24.50 18.50 268.00 643.50 776.50 4454.50
1980 782.00 567.50 635.50 389.50 247.00 151.00 11.00 4.50 75.50 261.50 561.00 712.00 4398.00
1981 664.00 550.50 567.50 338.50 195.50 59.50 14.00 2.00 94.00 387.00 502.50 687.50 4062.50
1982 914.50 635.00 671.50 539.50 175.00 94.00 24.50 3.50 140.50 329.00 656.50 811.00 4994.50
1983 736.00 632.50 617.50 543.00 242.50 76.00 52.50 12.00 74.00 213.50 643.00 778.50 4621.00
1984 765.50 662.00 506.00 477.50 212.50 101.00 2.00 10.00 80.50 461.00 686.50 864.00 4828.50
1985 763.50 623.50 678.00 262.50 248.50 44.50 9.00 0.00 z 153.00 333.50 750.50 802.00 4668.50
1986 669.50 559.00 432.00 374.50 269.50 29.50 5.50 0.00 z 238.50 270.00 566.50 756.00 4170.50
1987 847.00 657.00 607.50 278.50 140.00 42.00 39.00 1.50 29.50 144.00 572.50 832.00 4190.50
1988 831.50 553.50 511.00 0.00 z 338.50 137.00 5.50 2.50 83.50 141.00 609.00 821.50 4034.50
1989 868.00 734.50 621.50 275.50 248.50 41.50 8.50 29.50 74.00 334.50 551.50 752.50 4540.00
1990 778.00 714.50 504.00 221.00 275.00 87.50 8.00 28.50 22.00 275.50 640.50 960.50 4515.00
1991 797.50 489.50 700.50 458.00 307.00 89.50 2.50 8.00 5.00 191.50 523.00 812.50 4384.50
1992 766.50 534.00 437.50 312.50 56.00 60.00 7.50 6.00 35.50 207.50 566.00 871.50 3860.50
1993 890.00 673.00 423.50 452.00 212.50 108.50 7.00 10.00 61.00 207.50 679.50 803.50 4528.00
1994 720.00 659.00 453.50 345.00 160.50 70.50 0.00 0.50 34.50 322.00 807.00 842.50 4415.00
1995 716.00 453.50 600.00 456.50 238.50 120.00 6.50 16.00 33.50 277.50 407.00 670.50 3995.50
1996 768.00 592.50 510.50 418.50 237.50 47.50 4.00 0.00 74.50 308.50 528.00 761.00 4250.50
1997 772.50 571.50 470.50 393.00 96.50 64.00 12.00 3.50 52.00 316.00 490.50 800.50 4042.50
1998 725.50 674.00 550.50 448.50 356.50 35.50 0.00 1.00 55.00 357.50 601.50 890.50 4696.00
1999 767.50 730.00 658.50 449.00 231.00 85.00 13.00 20.50 31.50 230.00 467.00 772.50 4455.50
2000 708.00 610.50 548.50 302.00 215.00 46.50 5.50 0.00 71.00 290.00 635.00 746.50 4178.50
2001 801.50 677.00 444.00 455.50 78.00 50.00 0.00 1.00 30.00 208.00 543.50 793.50 4082.00
2002 779.00 568.00 598.00 289.50 221.50 26.00 0.00 15.50 40.00 271.50 533.00 739.00 4081.00
2003 610.50 573.50 491.00 533.00 238.00 16.00 0.00 0.50 33.00 183.50 627.00 742.00 4048.00
2004 797.00 631.50 365.50 318.00 163.50 36.00 0.00 6.50 0.00 z 0.00 z 557.00 745.50 3620.50
2005 727.50 517.50 461.00 432.00 230.50 127.50 0.00 0.00 84.00 323.00 566.50 762.50 4232.00
2006 784.50 609.00 750.50 445.00 158.10 a 20.17 a 0.00 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2767.27
Period of Record Statistics
MEAN 773.05 613.53 555.47 404.55 219.05 68.07 9.65 12.08 65.79 272.05 591.20 788.79 4379.20
S.D. 70.28 71.69 100.79 96.99 73.79 36.45 11.71 14.15 50.17 73.90 83.37 64.12 298.97
SKEW -0.20 -0.18 0.07 0.05 0.11 0.59 2.18 1.53 1.56 0.32 0.29 0.52 0.45
MAX 914.50 734.50 750.50 619.50 403.50 151.00 52.50 55.50 238.50 461.00 807.00 960.50 5045.50
MIN 610.50 453.50 365.50 221.00 56.00 16.00 0.00 0.00 5.00 141.00 407.00 670.50 3860.50
NO YRS 32 32 32 31 32 32 31 30 31 31 32 31 27