SUNNYSIDE, WASHINGTON

Monthly Total Heating Degree Days

(458207)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1894 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 92.00 q 496.00 0.00 z 1087.00 1583.00
1895 1166.00 780.00 680.00 380.50 207.00 55.50 11.50 9.00 231.50 406.00 793.50 960.50 5681.00
1896 1007.50 681.50 716.00 478.50 290.00 77.50 0.00 2.50 144.50 433.50 1034.50 896.00 5762.00
1897 1063.00 814.50 797.00 291.00 99.00 47.50 17.00 7.50 176.50 483.00 772.00 1016.00 5584.00
1898 1148.00 657.50 709.50 386.00 198.50 52.50 7.50 3.00 102.50 478.50 804.50 1170.00 5718.00
1899 1133.00 980.50 690.50 427.00 295.50 72.00 4.00 61.00 58.50 481.50 550.00 934.50 5688.00
1900 910.00 849.50 515.00 372.50 156.00 16.00 15.00 35.00 161.00 471.00 834.00 790.50 5125.50
1901 1063.00 880.50 682.00 509.50 213.00 161.00 15.00 3.10 a 222.00 280.00 701.50 968.50 5699.10
1902 1108.00 815.00 667.50 481.50 212.00 103.50 44.50 32.00 174.50 392.50 748.50 1056.50 5836.00
1903 951.00 950.50 702.50 494.50 245.00 33.00 37.00 21.50 188.00 427.50 778.50 1062.00 5891.00
1904 955.50 900.00 739.50 346.50 253.00 106.55 a 29.00 30.50 123.00 413.50 613.00 965.50 5475.55
1905 1024.00 887.00 533.50 395.50 239.50 64.50 10.00 42.50 121.50 624.50 0.00 z 1039.50 4982.00
1906 249.00 t 751.00 757.00 311.00 217.00 137.00 0.00 17.00 165.00 373.00 749.50 975.50 4453.00
1907 1350.50 0.00 z 0.00 z 131.50 v 0.00 z 0.00 z 0.00 z 0.00 z 189.50 342.00 672.50 0.00 z 2554.50
1908 0.00 z 0.00 z 0.00 z 0.00 z 137.00 o 105.00 13.50 54.77 a 140.17 a 428.50 661.00 1025.50 2428.44
1909 1329.00 723.00 635.50 482.50 284.00 32.00 14.50 38.00 121.00 419.00 653.50 1180.50 5912.50
1910 1089.00 917.00 468.50 293.50 104.50 80.00 5.00 73.00 154.00 361.50 753.50 914.50 5214.00
1911 1026.50 861.50 594.00 450.50 289.50 72.50 20.50 9.50 219.50 469.50 768.00 1018.00 5799.50
1912 1194.50 734.50 725.00 402.00 168.00 39.50 23.00 58.50 205.00 555.50 696.50 944.50 5746.50
1913 1168.00 997.00 738.50 382.00 229.00 34.00 30.50 24.50 167.50 498.00 686.50 1037.00 5992.50
1914 854.00 813.00 557.00 364.50 140.00 134.00 4.50 3.50 231.00 389.50 697.50 1277.00 5465.50
1915 1207.50 729.04 a 506.00 271.00 190.50 43.00 12.00 3.00 128.00 336.50 759.00 950.50 5136.04
1916 1393.00 841.00 544.50 335.00 228.50 75.00 21.50 20.50 114.00 430.00 897.50 1183.50 6084.00
1917 1108.50 805.00 785.00 468.50 224.00 87.50 6.50 0.00 66.00 347.50 656.00 682.00 5236.50
1918 834.50 810.00 598.50 374.50 233.00 29.50 3.00 13.50 27.00 314.50 709.50 867.50 4815.00
1919 989.00 755.00 595.00 351.00 205.50 92.00 11.50 0.50 135.50 477.50 753.50 1373.00 5739.00
1920 1113.50 803.50 629.50 496.00 285.00 89.50 0.00 33.50 107.00 389.00 734.50 917.50 5598.50
1921 935.50 728.00 575.00 424.50 163.00 28.00 11.50 10.50 210.00 357.50 768.00 1058.00 5269.50
1922 1414.50 903.50 715.00 488.00 229.00 7.00 0.00 10.00 83.50 353.00 805.00 1196.00 6204.50
1923 844.00 957.50 645.00 345.50 169.00 59.50 4.50 0.00 a 79.50 391.50 664.00 952.00 5112.00
1924 1165.50 618.50 626.00 377.00 96.50 16.03 a 10.00 17.50 137.50 390.50 786.00 1219.33 a 5460.37
1925 898.50 599.50 556.50 269.00 112.00 112.50 0.00 48.50 97.50 413.85 a 800.00 858.50 4766.35
1926 966.00 619.11 a 483.50 238.00 200.50 27.00 1.50 7.75 a 233.00 376.50 707.00 1100.00 4959.86
1927 1134.00 706.00 643.50 442.76 a 262.00 9.50 2.50 26.35 a 140.00 401.00 626.50 1119.00 5513.11
1928 1108.50 804.00 551.00 467.14 b 118.66 b 63.00 0.00 a 2.00 124.66 a 387.00 743.50 1050.00 5419.45
1929 1393.00 1169.50 608.63 a 470.00 194.02 b 55.34 a 7.50 12.00 184.14 a 358.00 874.50 928.00 6254.63
1930 1577.00 668.89 a 532.00 276.67 c 196.33 a 89.48 a 2.00 0.52 a 103.45 a 488.80 c 780.52 a 1003.00 5718.66
1931 935.68 a 731.11 a 593.00 359.50 98.50 59.00 2.00 2.50 112.00 403.50 838.50 1221.00 5356.29
1932 1137.50 873.00 611.50 337.50 182.50 35.00 16.50 30.50 120.50 416.50 686.50 1122.00 5569.50
1933 996.00 1022.50 680.00 398.00 277.50 49.50 1.50 15.00 202.50 314.50 719.50 754.50 5431.00
1934 824.50 670.50 461.50 191.50 141.50 34.00 7.00 1.50 172.00 317.50 609.50 872.00 4303.00
1935 965.50 763.50 681.50 453.00 175.00 44.50 18.00 23.00 70.00 478.50 919.50 1062.00 5654.00
1936 936.50 1238.00 689.00 288.00 104.50 41.50 1.00 5.50 127.00 323.00 934.50 942.50 5631.00
1937 1549.50 993.50 614.50 451.00 173.00 51.00 6.00 54.50 109.50 320.00 655.00 920.00 5897.50
1938 953.00 822.00 670.00 361.00 204.00 43.50 3.00 11.50 30.50 372.50 834.00 936.50 5241.50
1939 910.50 838.50 583.00 326.00 135.50 87.50 10.50 11.50 78.00 393.00 746.50 829.00 4949.50
1940 1098.00 793.50 520.50 351.00 140.50 28.00 1.50 3.50 52.50 329.50 907.50 987.00 5213.00
1941 1007.50 739.50 509.50 318.50 221.50 64.50 0.00 40.00 191.90 a 459.50 687.50 908.00 5147.90
1942 1254.50 783.50 679.50 369.00 220.50 109.50 7.50 26.50 70.00 354.50 809.50 1019.00 5703.50
1943 1314.00 798.00 724.50 383.00 277.00 99.50 20.50 19.00 40.00 422.50 766.00 1012.00 5876.00
1944 1086.00 827.50 735.50 399.50 189.00 37.50 7.50 5.00 81.00 283.50 804.00 1076.00 5532.00
1945 927.00 710.50 697.50 447.41 a 145.50 82.00 5.50 13.50 156.50 358.00 764.50 1024.50 5332.41
1946 927.00 723.00 636.50 378.50 107.50 87.50 5.50 6.50 147.00 519.50 842.50 898.50 5279.50
1947 1111.00 716.00 527.50 300.00 74.50 52.00 0.00 24.00 80.00 381.50 708.00 937.00 4911.50
1948 999.00 915.00 734.50 489.00 253.50 10.00 17.50 8.78 a 154.50 449.00 757.50 1124.00 5912.28
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 0.00 z 195.50 22.00 0.00 0.00 z 0.00 z 381.00 704.00 1101.50 3248.50
2007 1092.50 752.00 554.50 390.50 132.50 52.00 0.00 5.00 95.50 432.50 743.50 972.00 5222.50
2008 1095.50 709.00 668.50 536.90 a 168.95 a 86.90 a 1.50 9.50 98.50 438.00 665.50 1229.50 5708.24
2009 1039.50 847.50 739.00 437.50 207.00 13.50 0.00 z 2.50 80.50 571.50 766.00 1297.50 6002.00
2010 941.50 695.00 663.50 479.00 366.50 92.00 30.00 38.00 132.50 450.00 855.00 989.50 5732.50
2011 984.50 861.50 716.50 596.00 360.00 128.00 37.00 6.00 106.50 453.50 839.50 1111.50 6200.50
2012 1057.00 833.00 697.00 447.00 301.50 142.00 13.00 24.50 118.50 479.00 718.50 938.00 5769.00
2013 1141.00 774.50 677.50 22.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 37.00 z 2593.00
Period of Record Statistics
MEAN 1056.25 788.37 621.15 386.34 189.51 58.62 10.27 15.98 116.16 403.25 741.15 1002.22 5397.46
S.D. 180.36 119.28 84.00 78.03 61.97 32.70 10.50 16.09 54.77 67.79 98.88 125.95 411.56
SKEW 0.81 1.00 -0.14 0.07 0.35 0.73 1.33 1.26 0.30 -0.10 0.54 0.50 -0.19
MAX 1577.00 1238.00 797.00 596.00 366.50 161.00 48.00 73.00 233.00 624.50 1084.50 1373.00 6254.63
MIN 666.00 570.50 440.00 191.50 69.50 6.50 0.00 0.00 0.50 178.50 491.38 682.00 4303.00
NO YRS 115 113 114 113 115 117 116 116 116 119 114 116 105