PRIEST RAPIDS DAM, WASHINGTON

Monthly Total Heating Degree Days

(456747)

Base Temperature = 65 F

File last updated on Jul 25, 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
1956 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 407.50 p 0.00
1957 934.50 j 538.00 i 433.50 j 174.00 i 12.50 j 3.00 i 0.00 h 0.00 i 16.50 l 389.29 e 447.50 k 504.00 l 389.29
1958 577.00 j 391.50 h 311.50 o 268.50 i 21.50 j 0.00 j 0.00 k 0.00 j 60.00 j 245.00 h 401.50 m 627.50 k 0.00
1959 675.00 k 600.00 i 592.58 e 214.50 h 102.50 m 3.00 k 0.00 h 4.50 k 46.50 k 226.00 i 442.50 l 560.50 k 592.58
1960 717.00 m 741.05 a 553.50 316.50 154.00 8.50 0.00 7.00 15.50 264.50 662.00 1043.50 3766.05
1961 894.00 564.00 566.00 274.00 129.17 a 5.00 0.00 0.00 47.00 327.50 786.00 904.50 4497.17
1962 1000.50 740.00 631.00 211.50 149.00 20.00 0.00 z 0.00 43.00 312.00 566.50 788.50 4462.00
1963 1130.50 702.00 519.00 397.00 126.00 51.00 0.00 0.00 6.00 207.00 561.00 973.50 4673.00
1964 845.50 717.50 595.50 370.50 138.50 20.50 0.00 4.50 23.50 271.00 717.00 1112.00 4816.00
1965 944.00 646.50 606.50 234.50 114.00 12.00 0.00 1.50 51.50 190.50 561.00 922.50 4284.50
1966 944.50 670.50 570.00 252.50 101.00 35.00 9.50 0.00 4.50 325.00 577.00 760.50 4250.00
1967 749.50 561.50 606.50 438.00 142.00 9.50 0.00 0.00 9.00 280.50 606.00 955.50 4358.00
1968 841.50 656.50 468.50 386.50 91.50 12.86 b 0.00 4.00 25.00 371.50 611.50 984.50 4453.86
1969 1318.00 903.50 563.00 317.50 58.00 5.50 0.00 2.50 9.50 366.50 673.00 874.50 5091.50
1970 972.50 652.50 560.00 418.50 94.00 25.00 0.00 0.00 77.68 b 336.50 666.00 1023.00 b 4825.68
1971 863.98 d 665.54 b 727.39 c 361.50 55.50 g 32.78 c 10.50 0.00 a 90.50 375.58 e 651.11 c 718.50 i 3778.88
1972 1083.28 d 876.96 d 554.50 446.50 75.50 13.00 0.00 3.00 0.00 z 0.00 z 675.00 1076.00 4803.74
1973 1038.50 717.50 469.00 246.43 b 97.50 38.00 0.00 0.00 30.00 309.00 729.50 747.50 4422.93
1974 1032.50 630.50 566.00 336.00 149.00 20.50 4.50 0.00 11.50 289.00 600.00 810.00 4449.50
1975 946.00 817.00 659.50 449.50 95.21 c 12.50 0.00 4.00 1.00 300.00 686.00 866.00 4836.71
1976 961.50 735.00 668.00 369.00 102.00 43.50 1.00 3.00 6.50 191.00 o 659.48 a 958.00 4506.98
1977 1163.00 646.00 427.00 h 182.00 150.00 6.00 0.50 1.00 90.00 292.00 712.00 883.00 4125.50
1978 943.50 720.50 498.50 347.50 147.50 4.50 2.50 3.00 41.50 231.00 i 0.00 z 1070.00 3779.00
1979 1463.50 830.00 537.00 327.00 81.93 c 8.08 d 6.50 0.00 2.00 221.13 a 826.50 792.00 5095.64
1980 1173.50 844.00 594.50 245.50 93.55 c 42.12 d 0.00 11.00 34.00 334.50 664.44 c 852.00 4889.11
1981 781.50 692.50 468.62 a 330.00 119.50 44.50 4.00 0.00 93.00 382.00 622.00 921.50 4459.12
1982 1060.00 735.50 557.00 435.00 113.50 9.50 7.00 0.00 56.50 374.00 782.00 90.50 z 4130.00
1983 583.00 f 641.00 463.50 326.00 93.50 12.00 3.00 0.00 72.50 303.50 557.50 1225.50 3698.00
1984 951.50 733.50 492.50 365.50 203.00 32.50 0.00 0.00 98.00 435.50 720.50 1191.00 5223.50
1985 1182.00 965.50 614.50 272.00 112.50 1.50 0.00 0.00 126.00 385.00 1109.00 1303.00 6071.00
1986 939.50 721.50 459.00 329.50 147.50 3.00 9.50 0.00 102.50 230.00 609.00 962.50 4513.50
1987 1010.00 638.50 499.50 195.00 59.50 11.00 0.00 0.00 0.00 z 281.50 0.00 z 987.50 3682.50
1988 989.50 687.00 533.50 252.00 122.50 51.00 2.00 0.00 b 81.50 223.50 622.00 1011.00 4575.50
1989 885.00 1035.00 663.50 235.50 147.00 4.00 3.00 0.00 10.50 359.50 690.00 999.50 5032.50
1990 791.50 805.50 466.00 169.50 131.50 29.50 0.00 0.00 0.00 0.00 z 524.00 1165.50 4083.00
1991 1057.00 555.50 599.50 287.50 109.50 66.50 0.00 0.00 3.50 330.50 671.50 804.50 4485.50
1992 804.00 644.00 392.50 257.00 47.50 7.00 0.00 11.00 68.00 311.00 699.50 1068.50 4310.00
1993 1209.50 940.50 692.00 362.00 82.00 25.00 2.00 4.00 81.50 297.50 888.00 885.00 5469.00
1994 832.50 834.00 507.00 241.00 76.00 18.00 0.50 0.00 4.00 303.50 744.50 901.50 4462.50
1995 924.00 632.50 565.50 380.00 94.50 60.50 0.00 1.00 21.00 358.00 650.50 973.50 4661.00
1996 1117.00 931.50 671.50 324.00 196.00 14.00 5.00 0.00 90.00 395.00 747.50 989.86 b 5481.36
1997 963.00 703.00 0.00 z 353.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 890.50 2910.00
1998 890.00 613.50 472.00 269.50 85.00 0.00 0.00 0.00 5.50 0.00 z 495.50 921.00 3752.00
1999 786.50 613.50 544.00 300.52 a 189.00 29.50 3.50 9.82 a 31.03 a 340.00 508.50 780.68 a 4136.55
2000 932.50 702.44 b 575.05 a 245.56 c 77.50 f 22.76 a 1.50 0.00 86.67 c 0.00 z 835.50 1025.58 a 4427.56
2001 933.62 a 787.63 a 506.85 a 347.68 b 100.50 32.07 a 0.00 c 0.00 12.50 332.45 b 565.18 b 841.00 4459.47
2002 797.00 688.00 656.50 312.00 129.50 22.00 0.00 0.00 30.50 378.00 661.50 0.00 z 3675.00
2003 783.00 646.50 468.00 0.00 z 156.00 0.00 z 0.00 z 0.00 24.00 0.00 z 740.50 898.50 3716.50
2004 0.00 z 779.00 428.50 0.00 z 93.50 9.50 0.00 0.00 27.50 261.95 a 676.00 802.00 3077.95
2005 1026.00 711.50 500.00 0.00 z 71.00 15.50 0.00 0.00 z 0.00 z 261.00 718.50 1056.00 4359.50
2006 786.00 742.00 565.00 325.00 116.00 0.00 b 0.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2534.00
Period of Record Statistics
MEAN 971.41 728.07 553.65 314.62 115.58 21.04 1.77 1.60 41.56 315.55 675.11 953.54 4724.43
S.D. 152.68 108.65 75.26 72.17 35.73 16.74 2.92 2.98 35.85 57.36 110.62 128.46 443.75
SKEW 0.97 0.86 0.19 0.00 0.45 0.92 1.72 2.08 0.60 -0.24 1.41 0.60 1.24
MAX 1463.50 1035.00 727.39 449.50 203.00 66.50 10.50 11.00 126.00 435.50 1109.00 1303.00 6071.00
MIN 749.50 555.50 392.50 169.50 47.50 0.00 0.00 0.00 0.00 190.50 495.50 747.50 4136.55
NO YRS 44 47 46 44 44 45 43 44 42 39 43 43 28