WAPATO, WASHINGTON

Monthly Total Heating Degree Days

(458959)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1915 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 373.50 800.89 b 1026.74 b 2201.13
1916 1396.00 893.82 a 597.50 389.50 297.50 111.00 36.50 18.50 104.50 408.88 b 902.50 1178.50 6334.70
1917 1131.50 a 844.15 a 800.83 a 513.46 d 247.50 110.50 12.29 b 0.53 b 59.50 338.50 621.00 715.50 5395.27
1918 0.00 z 859.50 787.50 521.50 413.50 66.50 15.50 38.50 27.50 334.50 692.07 a 889.50 4646.07
1919 1003.50 796.50 581.00 369.00 242.50 111.00 15.50 1.50 148.00 486.50 761.50 1359.35 a 5875.85
1920 1119.00 802.00 640.00 481.00 252.13 a 91.50 2.50 51.00 160.00 425.50 715.50 937.00 5677.13
1921 986.00 760.00 583.00 457.00 170.50 58.00 20.00 12.50 233.00 353.50 764.50 1054.00 5452.00
1922 1430.50 927.50 722.00 452.00 256.00 9.00 0.00 12.50 48.50 0.00 z 0.00 z 0.00 z 3858.00
1923 0.00 z 0.00 z 0.00 z 290.00 232.50 c 73.00 9.30 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 604.80
1924 624.00 k 667.52 a 661.50 324.50 g 82.50 14.50 7.00 18.17 b 123.50 384.73 c 737.00 1203.12 b 3899.54
1925 886.50 605.50 527.52 a 272.00 87.00 82.50 0.00 32.50 88.00 375.00 790.50 839.50 4586.52
1926 940.00 608.22 a 447.50 243.21 b 219.00 42.50 1.50 31.00 192.50 g 366.50 664.50 1097.50 4661.44
1927 1131.00 745.00 642.50 440.00 270.00 2.50 1.00 30.50 140.00 393.70 a 632.50 1124.50 5553.20
1928 1104.00 824.00 567.30 a 468.75 b 0.00 z 42.50 0.00 b 2.58 a 71.00 390.00 739.00 1044.50 5253.63
1929 1030.00 i 1161.50 589.00 461.50 170.50 58.00 0.00 9.00 165.00 a 323.50 847.50 929.50 4715.00
1930 1565.00 679.50 518.73 a 250.50 193.75 a 68.00 0.00 0.00 85.00 486.00 781.00 1011.50 5638.98
1931 936.20 a 738.50 602.50 352.50 101.00 49.66 a 2.00 1.03 a 105.52 a 374.07 a 837.50 1190.29 b 5290.77
1932 1138.22 a 862.00 593.00 182.00 l 148.00 33.50 9.00 20.15 a 63.50 377.50 661.50 1091.50 4997.87
1933 970.50 959.50 662.50 375.50 272.00 32.00 0.50 9.30 a 163.50 250.50 684.00 739.00 5118.80
1934 788.00 602.00 426.00 143.00 122.50 15.00 4.13 a 4.00 182.07 a 297.00 598.50 865.00 4047.20
1935 970.50 752.50 686.50 432.00 129.00 38.50 13.50 12.00 45.00 453.00 893.00 1049.35 a 5474.85
1936 927.00 1182.50 654.50 261.96 b 92.50 46.50 0.50 0.50 77.59 a 274.50 900.50 910.50 5329.05
1937 1529.50 978.00 568.00 422.50 149.00 51.00 3.00 35.00 81.50 246.50 624.00 905.00 5593.00
1938 932.00 812.50 637.50 301.61 b 163.00 45.00 3.50 4.50 15.50 355.50 799.50 905.50 4975.61
1939 929.50 833.26 a 554.00 284.00 118.66 b 86.50 14.00 12.50 66.50 363.00 390.00 n 445.50 p 3261.91
1940 1086.07 b 765.50 479.50 327.50 112.78 b 6.00 0.00 0.00 c 30.50 288.50 899.46 b 966.00 4961.81
1941 988.00 704.50 467.50 257.50 169.00 38.00 0.00 18.50 132.50 400.50 663.00 888.50 4727.50
1942 1237.50 767.50 621.50 312.00 182.00 73.50 5.50 11.76 b 29.50 308.50 801.00 1047.50 5397.76
1943 1279.00 757.62 b 690.50 285.50 213.00 71.00 4.50 7.50 20.50 363.00 739.50 974.50 5406.12
1944 1079.00 781.00 670.00 330.00 143.50 32.50 3.50 0.50 68.50 203.00 764.00 1047.50 5123.00
1945 899.00 679.50 648.50 412.50 124.50 38.50 2.21 c 4.00 f 127.22 c 311.55 a 776.50 1029.00 5048.99
1946 927.42 a 714.00 621.03 a 382.50 98.34 b 63.89 c 3.00 0.50 112.50 490.00 846.50 922.00 5181.68
1947 1111.50 679.00 476.00 259.50 51.87 e 42.22 c 0.52 a 5.00 67.50 376.00 699.31 a 918.63 a 4687.05
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5.17 a 13.95 a 14.47 a 137.07 a 372.50 f 744.00 1116.00 2030.66
1949 1491.00 890.50 608.50 268.00 108.50 a 46.55 a 4.00 8.27 a 73.39 b 499.10 a 597.86 b 898.00 5493.67
1950 1529.00 915.00 443.00 k 342.00 g 190.50 52.50 3.50 0.00 a 68.00 443.00 708.00 848.00 4757.50
1951 998.00 753.00 748.00 290.00 145.50 27.00 5.50 18.50 68.00 412.00 775.50 1131.00 5372.00
1952 1238.50 794.50 667.69 e 264.11 b 118.50 51.00 6.20 a 12.29 b 47.50 230.00 918.50 933.50 5282.29
1953 690.50 644.50 597.02 b 435.00 233.53 a 107.50 1.03 a 15.50 94.00 343.50 652.20 e 826.00 4640.28
1954 1047.00 771.50 705.50 427.00 151.50 128.04 b 14.50 31.00 124.00 515.50 600.00 663.00 i 4515.54
1955 349.00 u 483.00 l 771.79 b 544.04 d 250.87 d 41.00 g 35.50 3.00 153.50 435.50 974.50 1123.50 4292.20
1956 1065.37 a 1123.00 647.00 269.50 105.00 80.00 0.00 11.37 a 70.00 419.50 857.00 949.50 5597.23
1957 1444.50 817.50 648.50 327.50 54.00 27.00 8.50 7.50 44.50 427.59 b 749.00 831.00 5387.09
1958 853.50 539.50 651.00 407.00 56.00 21.00 0.00 3.50 119.00 364.50 716.50 917.00 4648.50
1959 955.00 771.00 617.00 307.50 252.50 51.50 20.00 13.50 131.50 373.50 816.00 965.50 5274.50
1960 1267.00 768.00 619.50 372.00 235.50 34.00 0.00 c 63.00 75.00 336.35 a 701.00 1100.50 5571.85
1961 900.00 590.50 570.00 358.50 179.50 24.50 0.00 0.00 119.50 437.50 863.00 937.50 4980.50
1962 994.00 740.50 693.50 275.00 239.00 66.50 22.50 16.00 75.50 435.50 651.50 858.50 5068.00
1963 1168.50 755.00 580.00 442.00 172.50 46.50 6.50 i 11.50 22.00 316.00 650.00 1058.00 5222.00
1964 873.00 741.00 689.50 439.00 225.00 42.50 10.00 36.00 115.00 387.00 776.50 1133.00 5467.50
1965 1040.00 668.00 632.50 288.50 198.50 34.50 8.50 21.50 107.50 309.00 597.50 973.50 4879.50
1966 996.50 713.50 601.50 307.00 133.00 73.50 15.50 10.00 35.50 376.50 643.50 854.50 4760.50
1967 769.50 595.00 658.50 517.00 155.00 30.00 0.00 0.00 28.00 337.50 693.50 978.00 4762.00
1968 918.00 654.50 554.50 428.00 158.50 35.50 1.50 35.00 70.50 475.00 695.00 1043.00 5069.00
1969 1325.00 910.00 607.50 394.00 101.00 25.00 3.00 16.50 88.00 470.00 715.50 953.50 5609.00
1970 1062.50 659.50 616.00 493.00 162.00 40.00 3.00 0.00 176.50 452.50 740.00 1035.50 5440.50
1971 866.00 704.50 731.00 428.50 125.00 79.00 33.00 4.00 167.00 444.00 710.00 1010.00 5302.00
1972 1055.00 859.50 532.50 473.50 98.00 30.00 9.00 6.50 193.50 398.50 705.50 1129.50 5491.00
1973 1084.00 738.00 545.00 288.50 136.50 45.50 0.00 14.50 60.00 373.50 782.00 837.50 4905.00
1974 1103.50 675.00 606.50 368.50 217.00 32.00 25.00 0.00 45.50 370.00 642.50 860.50 4946.00
1975 979.50 824.00 683.50 442.50 164.82 a 38.00 0.00 20.00 37.50 409.50 732.00 907.00 5238.32
1976 915.50 784.50 694.00 415.00 133.00 83.50 8.00 20.50 24.00 384.00 711.00 1023.00 5196.00
1977 1215.00 680.00 602.00 208.50 246.50 17.00 7.00 8.50 129.50 378.00 762.00 920.00 5174.00
1978 986.00 713.00 491.00 373.50 199.00 24.50 0.00 15.50 98.00 380.00 926.50 1089.50 5296.50
1979 1477.50 833.50 531.00 388.00 103.50 18.50 11.50 0.00 24.00 289.00 870.50 886.50 5433.50
1980 1287.00 906.52 b 496.50 g 262.00 123.00 56.54 d 3.50 30.50 76.00 375.50 700.71 b 630.00 l 3821.27
1981 794.38 c 692.74 a 517.00 384.81 d 192.00 91.50 31.00 0.50 136.00 487.50 705.00 1084.48 a 5116.91
1982 1194.00 768.50 661.00 535.50 208.00 54.50 23.50 4.00 144.50 515.50 899.50 1092.00 6100.50
1983 884.50 717.50 539.50 422.50 174.00 70.00 33.50 5.00 180.50 448.50 674.00 1342.00 5491.50
1984 1053.00 823.00 572.00 491.50 324.00 106.50 6.00 16.00 148.00 506.00 782.59 a 1296.00 6124.59
1985 1197.50 944.50 628.00 317.50 152.00 25.00 0.00 15.00 170.00 443.00 1099.00 1363.50 6355.00
1986 1023.00 729.00 494.00 437.50 241.50 17.00 35.00 0.00 195.50 357.50 712.00 1075.00 5317.00
1987 1068.50 718.50 590.50 282.50 112.00 46.00 11.50 5.50 66.00 357.00 670.00 1091.50 5019.50
1988 1100.50 744.50 609.00 339.00 221.00 96.00 17.50 2.00 126.50 231.50 660.50 1095.00 5243.00
1989 0.00 z 1077.00 718.00 297.00 171.00 25.50 15.50 3.00 58.00 419.50 630.50 1046.50 4461.50
1990 841.50 785.50 567.00 243.00 218.50 69.00 6.50 5.50 4.00 479.00 623.50 1259.50 5102.50
1991 1132.50 629.50 701.00 372.50 209.50 101.00 0.00 1.00 32.50 403.00 756.00 948.00 5286.50
1992 895.50 690.50 462.00 339.00 111.00 17.50 4.50 24.50 149.50 365.50 774.50 1166.00 5000.00
1993 1289.00 956.50 751.50 436.00 124.50 76.50 25.00 31.00 117.50 347.00 945.50 987.50 6087.50
1994 886.50 884.50 546.00 288.00 134.00 85.50 6.00 1.50 25.00 404.50 824.00 960.50 5046.00
1995 1054.50 653.00 638.00 437.00 149.50 79.50 4.00 38.00 56.50 442.00 683.00 1020.50 5255.50
1996 1106.00 977.50 636.50 384.50 296.50 59.00 13.50 10.00 159.00 458.50 861.00 1183.00 6145.00
1997 1106.00 759.50 616.00 445.50 148.50 70.00 7.50 2.50 84.00 448.00 710.50 1042.50 5440.50
1998 1004.50 702.00 570.00 388.00 0.00 z 17.00 0.00 3.50 34.50 443.50 650.00 1030.50 4843.50
1999 885.64 b 712.00 625.50 417.00 290.00 80.00 36.50 17.00 0.00 z 447.50 590.50 862.00 4963.64
2000 1032.00 788.18 a 647.50 319.00 189.00 56.00 14.50 9.00 134.50 452.08 a 935.50 1109.00 5686.26
2001 990.50 809.00 583.50 436.00 193.50 77.50 12.00 6.50 54.00 415.50 704.00 943.00 5225.00
2002 899.00 746.00 736.00 403.00 217.00 52.50 7.50 11.00 96.50 440.50 769.00 934.50 5312.50
2003 848.50 721.00 523.00 404.00 217.00 28.50 0.50 1.00 69.00 288.50 855.00 1004.00 4960.00
2004 1136.00 812.50 487.50 325.00 170.50 72.50 6.00 8.50 85.50 369.00 769.00 962.00 5204.00
2005 1041.50 751.00 489.00 380.00 132.00 64.00 0.00 0.00 z 86.00 381.00 815.00 1212.00 5351.50
2006 872.00 816.50 0.00 z 395.50 209.50 28.50 2.50 10.00 117.50 405.50 777.50 1171.50 4806.50
2007 1128.50 799.00 582.80 a 409.50 149.50 66.00 0.00 12.50 109.00 483.00 799.00 1023.00 5561.80
2008 1143.50 711.00 0.00 z 536.00 162.00 87.00 1.50 0.00 z 0.00 z 0.00 z 0.00 z 1247.50 3888.50
2009 1058.00 0.00 z 0.00 z 0.00 z 224.00 0.00 z 0.00 z 0.00 z 67.50 519.50 751.50 1270.50 3891.00
2010 907.00 668.00 590.50 424.00 288.00 75.00 6.00 12.50 83.50 381.50 842.50 992.00 5270.50
2011 977.00 856.00 683.50 547.50 282.00 71.00 9.00 0.00 53.50 409.50 826.00 1121.50 5836.50
2012 99.50 z 802.50 673.00 380.00 217.00 102.00 7.00 4.50 0.00 z 434.00 0.00 z 952.00 3572.00
2013 1126.00 735.00 612.00 11.50 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 2473.00
Period of Record Statistics
MEAN 1063.26 779.36 611.84 374.67 179.00 54.17 8.50 12.29 93.32 391.02 753.89 1020.18 5305.51
S.D. 183.44 119.24 78.79 85.39 65.65 28.44 9.76 12.40 49.83 68.41 98.56 133.09 413.21
SKEW 0.85 1.07 -0.03 -0.07 0.55 0.35 1.45 1.51 0.41 -0.40 0.65 0.43 0.17
MAX 1565.00 1182.50 800.83 547.50 413.50 128.04 36.50 63.00 233.00 519.50 1099.00 1363.50 6355.00
MIN 690.50 539.50 426.00 143.00 51.87 2.50 0.00 0.00 4.00 203.00 590.50 715.50 4047.20
NO YRS 90 94 91 92 94 95 95 92 92 94 93 93 73