SUNNYSIDE, WASHINGTON

Monthly Total Heating Degree Days

(458207)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200601
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 10.00 17.50 18.00 154.50 449.00 757.50 1124.00 2530.50
1949 1475.00 912.50 646.00 317.00 120.50 61.50 11.00 21.50 80.50 489.00 575.00 888.50 5598.00
1950 1510.50 929.00 680.50 472.00 231.00 59.00 8.50 1.50 71.00 403.52 a 686.50 831.00 5884.02
1951 949.00 762.00 753.00 329.00 148.00 46.00 9.00 16.50 73.00 412.50 752.50 1071.00 5321.50
1952 1177.00 762.00 629.00 305.19 d 141.50 66.00 0.00 29.50 60.50 233.00 893.00 937.50 5234.19
1953 666.00 627.50 586.50 435.00 236.50 113.50 2.50 8.00 72.00 320.00 620.00 799.50 4487.00
1954 1027.50 737.00 703.50 421.50 167.50 110.00 17.00 28.00 127.50 507.50 594.83 a 968.00 5409.83
1955 1033.50 777.00 776.00 548.00 266.50 49.00 48.00 18.50 199.00 383.50 941.50 1078.50 6119.00
1956 1007.00 1121.00 654.00 323.50 128.00 86.00 0.50 15.00 74.00 409.00 810.50 960.00 5588.50
1957 1438.00 850.50 653.00 364.50 69.50 33.50 12.50 16.50 62.00 450.00 736.00 877.50 5563.50
1958 859.00 570.50 658.50 431.00 82.00 15.00 4.00 5.50 130.00 384.50 724.00 901.00 4765.00
1959 999.50 788.00 622.50 368.00 290.50 47.50 19.50 25.50 138.00 385.00 815.00 982.50 5481.50
1960 1283.00 790.50 658.00 378.50 254.00 52.50 2.00 60.00 96.50 341.50 682.00 1108.00 5706.50
1961 937.50 604.00 590.50 393.00 215.50 31.00 2.50 1.50 148.00 452.60 a 871.61 b 915.50 5163.21
1962 1021.50 748.50 737.50 308.50 287.50 87.50 37.50 24.50 98.00 405.50 651.50 862.50 5270.50
1963 1167.00 761.00 589.00 468.50 209.50 53.00 20.00 16.00 40.50 338.50 630.50 1047.00 5340.50
1964 854.50 742.00 692.00 466.07 b 262.00 53.00 11.50 48.50 143.00 420.00 782.50 1135.00 5610.07
1965 1037.00 655.50 666.50 320.50 213.00 46.00 15.00 31.50 136.00 317.00 606.00 966.88 b 5010.88
1966 941.00 726.50 619.00 338.50 170.50 88.00 23.00 14.00 61.00 387.00 628.50 816.85 a 4813.85
1967 760.50 624.00 622.50 527.00 179.00 18.00 3.00 0.00 28.50 362.50 686.00 918.00 4729.00
1968 910.00 649.00 510.50 446.50 165.50 41.50 4.50 30.50 88.00 496.00 698.00 1044.50 5084.50
1969 1329.00 920.00 609.50 411.50 136.00 25.00 5.50 32.00 94.50 502.50 716.50 965.50 5747.50
1970 1084.50 666.50 628.00 500.00 204.50 41.00 5.50 1.00 208.00 475.50 750.50 1034.00 5599.00
1971 851.50 715.00 756.50 446.50 152.00 113.50 29.50 6.50 204.00 469.00 737.50 984.00 5465.50
1972 1048.00 868.00 584.50 479.50 153.50 30.50 12.50 7.50 212.50 426.00 720.50 1137.50 5680.50
1973 1067.00 743.00 596.00 367.50 182.00 78.00 15.00 34.50 111.50 419.50 771.50 851.00 5236.50
1974 1124.50 674.50 619.50 394.00 266.00 44.50 26.50 5.00 65.00 407.00 678.00 868.00 5172.50
1975 950.00 832.50 696.00 522.00 206.00 55.00 3.00 18.50 91.50 419.00 729.50 894.00 5417.00
1976 903.00 771.50 665.50 430.00 176.50 123.00 16.50 29.00 47.50 419.50 689.50 1061.50 5333.00
1977 1215.00 682.00 618.50 274.00 277.00 22.50 20.50 9.50 153.50 417.50 779.50 896.00 5365.50
1978 988.50 703.00 511.00 384.50 234.00 30.00 1.00 14.50 123.00 409.00 909.00 1051.00 5358.50
1979 1522.50 840.50 564.50 384.50 132.50 41.50 17.50 0.00 41.50 290.50 891.50 907.50 5634.50
1980 1264.50 900.00 621.00 299.50 169.50 69.00 8.00 26.50 88.00 397.00 688.00 871.50 5402.50
1981 834.50 731.50 488.00 378.00 192.50 84.00 27.50 2.00 113.50 441.50 662.00 1010.08 a 4965.08
1982 1131.00 726.00 608.00 492.00 212.00 41.50 22.00 3.00 112.50 443.50 826.00 1025.00 5642.50
1983 839.00 662.50 488.00 390.50 171.00 56.50 26.00 0.00 159.00 424.50 605.00 1288.50 5110.50
1984 1005.00 755.50 517.00 441.50 272.00 83.00 0.50 4.50 156.00 481.50 749.50 1176.50 5642.50
1985 1155.50 930.50 619.00 304.50 148.50 28.00 0.00 14.00 168.50 421.00 1084.50 1318.50 6192.50
1986 963.00 691.00 474.00 403.00 208.00 9.00 20.50 0.00 223.00 387.00 727.50 1067.43 a 5173.43
1987 1060.50 739.00 596.50 279.50 127.50 46.50 7.00 2.00 63.50 331.00 628.00 1037.50 4918.50
1988 1018.00 676.00 565.50 287.50 174.50 82.00 10.50 0.00 101.00 178.50 581.50 1000.50 4675.50
1989 833.00 1019.00 641.50 256.00 153.50 14.50 7.00 0.00 56.50 380.00 608.50 1007.50 4977.00
1990 782.50 743.00 533.50 233.50 181.50 47.50 5.50 2.00 0.50 452.00 599.00 1207.00 4787.50
1991 1101.50 429.50 i 0.00 z 0.00 z 191.00 94.00 0.00 1.00 34.00 377.00 717.00 891.00 3406.50
1992 858.50 647.00 442.50 298.00 93.00 20.50 1.50 22.50 140.00 346.50 749.00 1084.00 4703.00
1993 1238.00 933.00 730.00 402.50 103.50 52.50 11.50 24.50 115.50 333.50 871.00 938.50 5754.00
1994 839.50 835.50 521.00 264.00 110.50 51.00 4.50 0.00 24.50 381.00 790.50 912.50 4734.50
1995 1011.50 616.50 621.00 401.00 122.50 52.50 0.50 22.50 51.00 425.50 645.50 967.00 4937.00
1996 1042.50 921.50 600.50 357.00 269.00 42.50 6.50 6.50 156.50 430.50 802.00 0.00 z 4635.00
1997 0.00 z 0.00 z 540.00 407.00 111.00 37.50 3.00 1.00 71.50 394.50 659.50 979.50 3204.50
1998 943.50 647.00 533.50 367.00 164.50 6.50 0.00 1.50 30.50 404.50 0.00 z 0.00 z 3098.50
1999 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 70.00 7.50 15.50 0.00 z 403.00 a 491.38 a 816.00 1803.38
2000 951.50 752.00 567.00 256.50 127.50 34.50 5.00 3.00 100.00 372.00 864.50 1021.50 5055.00
2001 937.50 753.00 538.50 395.50 148.00 45.50 0.00 1.00 42.50 366.00 637.00 873.50 4738.00
2002 825.50 689.50 687.50 346.00 164.00 35.00 2.00 6.50 68.00 417.50 714.00 879.00 4834.50
2003 797.50 690.50 468.00 345.00 184.00 22.50 1.50 2.00 56.00 221.50 0.00 z 981.50 3770.00
2004 1111.50 785.00 440.00 317.50 130.00 60.50 0.50 0.50 66.50 323.00 715.50 896.00 4846.50
2005 1035.00 744.00 503.50 346.00 105.00 50.50 0.00 1.00 102.00 361.50 0.00 z 1186.50 4435.00
2006 844.50 0.00 z 0.00 z 359.40 e 197.07 c 22.78 c 0.00 m 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1423.75
Period of Record Statistics
MEAN 1027.89 761.91 604.41 378.28 178.76 51.39 10.35 12.96 100.61 394.78 726.05 987.85 5265.62
S.D. 189.51 110.66 80.96 74.59 55.46 27.50 10.43 13.38 52.57 65.03 107.68 117.20 396.50
SKEW 0.84 0.91 -0.04 0.22 0.28 0.70 1.32 1.18 0.51 -1.01 0.72 0.73 0.15
MAX 1522.50 1121.00 776.00 548.00 290.50 123.00 48.00 60.00 223.00 507.50 1084.50 1318.50 6192.50
MIN 666.00 570.50 440.00 233.50 69.50 6.50 0.00 0.00 0.50 178.50 491.38 799.50 4487.00
NO YRS 56 54 55 56 57 59 58 58 57 58 55 56 50