RITZVILLE 1 SSE, WASHINGTON

Monthly Total Heating Degree Days

(457059)

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
1899 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 0.00 z 0.00
1900 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 0.00 z 0.00
1901 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 0.00 z 0.00
1902 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 0.00 z 0.00
1903 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 0.00 z 0.00
1904 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 0.00 z 0.00
1905 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 0.00 z 0.00
1906 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 0.00 z 0.00
1907 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 0.00 z 0.00
1908 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 0.00 z 0.00
1909 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 0.00 z 0.00
1910 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 0.00 z 0.00
1911 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 0.00 z 0.00
1912 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 0.00 z 0.00
1913 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 0.00 z 0.00
1914 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 0.00 z 0.00
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 0.00 z 0.00 z 0.00 z 0.00
1916 1013.00 k 1015.00 741.50 498.50 421.00 238.85 d 61.50 26.50 171.00 0.00 z 1017.41 a 1264.50 5455.76
1917 1304.50 987.00 953.50 621.50 336.50 201.00 18.50 0.00 112.50 404.50 647.50 886.00 6473.00
1918 985.50 910.50 702.15 a 463.00 388.50 55.00 14.00 68.00 43.00 396.50 814.00 1053.00 5893.15
1919 1062.00 912.50 732.00 449.00 302.50 172.00 17.00 12.50 172.00 640.50 891.00 1401.00 6764.00
1920 1186.50 963.21 a 768.50 604.00 378.00 171.21 a 6.72 a 60.00 183.50 522.50 807.00 992.00 6643.14
1921 1022.00 858.31 b 715.58 a 557.50 266.50 47.50 25.00 13.50 287.07 a 411.50 855.00 1160.50 6219.96
1922 1485.00 1179.50 868.00 591.50 319.00 15.50 0.00 b 23.50 109.66 a 409.00 932.00 1363.50 7296.16
1923 1022.50 1180.67 a 755.00 426.00 267.50 149.00 20.50 4.00 108.50 440.00 725.00 0.00 z 5098.67
1924 1262.00 690.50 760.00 488.79 a 132.50 57.41 a 29.50 37.50 187.24 a 477.50 879.83 a 1309.50 6312.28
1925 1114.00 717.11 a 0.00 z 399.00 194.00 121.50 0.00 63.00 162.50 548.50 919.00 926.38 a 5164.99
1926 1103.00 707.50 617.50 332.50 291.00 107.00 6.50 o 16.00 313.97 a 467.50 754.00 1137.00 5846.97
1927 1201.50 835.50 782.23 a 563.50 375.00 71.50 9.30 a 39.78 a 246.00 473.50 0.00 z 1289.00 5886.82
1928 1223.43 b 924.38 a 689.50 572.00 166.00 112.00 11.00 12.50 157.00 479.50 813.00 0.00 z 5160.31
1929 1494.00 1345.00 724.88 a 602.50 275.50 112.50 19.00 9.50 215.00 365.00 903.00 965.00 7030.88
1930 1565.00 751.00 657.20 a 330.00 295.50 134.00 5.00 4.00 130.34 a 565.50 871.03 a 1178.00 6486.58
1931 983.50 821.33 a 719.00 493.50 203.00 110.50 11.00 8.00 168.00 455.50 930.00 1158.37 a 6061.70
1932 1200.50 999.00 754.50 433.50 311.50 64.82 b 38.23 a 57.00 136.00 463.50 698.50 1217.27 a 6374.32
1933 1050.00 1214.00 746.00 517.00 421.50 125.50 8.00 35.00 243.50 371.00 762.41 a 848.00 6341.91
1934 837.00 686.52 a 512.02 a 245.17 a 206.00 88.00 19.12 a 15.00 251.00 391.00 665.50 989.86 b 4906.19
1935 1061.23 a 801.00 829.00 588.00 259.00 115.50 49.00 41.33 a 69.50 500.50 970.00 1065.50 6349.57
1936 1021.00 1371.00 787.50 397.24 a 153.00 88.45 a 2.00 11.50 155.00 338.00 906.50 1002.50 6233.69
1937 1685.00 1054.50 652.03 a 570.52 a 253.00 108.50 7.50 63.50 152.50 345.65 a 718.50 972.50 6583.70
1938 1021.50 897.50 740.00 483.00 297.00 92.00 15.00 40.00 55.00 413.50 895.00 1024.55 a 5974.05
1939 944.00 975.50 691.50 417.00 218.03 a 154.50 22.00 9.00 111.60 e 479.50 722.50 856.63 a 5601.77
1940 1110.83 a 843.00 622.50 451.00 199.50 79.00 14.00 21.50 88.50 357.00 1005.50 1017.50 5809.83
1941 1112.00 752.00 592.50 391.00 312.50 142.50 0.00 50.00 274.00 540.00 746.00 971.33 a 5883.83
1942 1331.00 912.50 789.50 454.50 361.50 182.00 21.00 43.50 96.00 418.00 899.50 1100.50 6609.50
1943 1396.50 933.00 874.00 453.50 421.60 a 204.50 38.00 29.00 75.50 449.00 820.00 1105.50 6800.10
1944 1125.00 977.00 861.50 495.50 250.50 111.50 18.00 27.00 124.00 254.50 881.50 1155.00 6281.00
1945 987.35 a 830.50 839.50 609.50 246.00 156.50 11.00 20.00 225.00 c 380.50 852.50 1119.00 6277.35
1946 0.00 z 819.78 a 741.50 481.50 215.50 153.00 19.50 22.00 172.24 a 625.00 915.50 1009.00 5174.52
1947 1261.50 812.50 644.00 462.50 170.50 b 107.00 16.05 c 23.50 0.00 z 452.60 a 853.00 0.00 z 4803.15
1948 1110.00 1001.50 0.00 z 0.00 z 0.00 z 47.07 a 52.00 37.00 68.00 m 463.00 844.50 1309.00 4864.07
1949 1700.50 1072.00 682.00 393.00 186.50 118.00 23.50 31.00 14.50 m 570.00 651.00 1070.00 6497.50
1950 1689.50 1045.50 834.00 585.00 358.00 131.79 b 25.50 9.00 109.50 522.00 824.00 917.00 7050.79
1951 1110.00 894.00 898.50 473.00 295.50 115.50 19.63 a 42.50 120.54 b 519.50 865.50 1272.50 6626.67
1952 1307.50 910.00 795.50 432.00 268.15 a 111.50 25.50 32.00 79.00 259.50 966.50 1055.00 6242.15
1953 800.50 778.50 707.50 545.00 358.00 185.50 17.05 a 39.50 118.50 393.70 a 710.50 952.70 c 5606.95
1954 1199.00 880.50 846.00 591.00 266.00 212.50 39.50 55.59 b 176.90 a 502.50 648.00 1066.50 6483.98
1955 1174.00 981.00 960.50 676.50 429.00 98.00 76.47 a 8.50 g 202.00 473.00 1075.00 1156.50 7301.97
1956 1080.50 1272.50 794.50 413.00 236.00 161.00 9.30 a 49.00 114.00 539.00 957.93 a 1063.82 a 6690.55
1957 1563.50 1021.50 758.50 487.50 176.50 86.50 35.50 35.00 89.50 544.57 a 833.50 894.72 b 6526.79
1958 974.50 618.00 758.00 564.00 150.00 66.50 6.00 4.00 204.50 423.00 844.00 1006.50 5619.00
1959 1079.00 927.00 745.50 491.00 399.50 110.00 39.00 62.00 247.50 521.50 946.00 1050.90 a 6618.90
1960 1360.50 896.50 764.50 523.50 385.50 100.50 5.00 95.00 119.50 422.50 796.00 1121.34 b 6590.34
1961 1023.00 706.50 713.50 509.00 319.50 52.50 2.50 0.00 211.50 518.50 959.50 1105.00 6121.00
1962 1202.00 838.50 831.50 401.50 418.50 151.00 74.00 68.00 132.00 472.00 765.50 945.00 6299.50
1963 1323.00 793.00 698.50 563.50 285.00 100.50 39.00 31.50 51.50 372.00 760.50 1171.50 6189.50
1964 1015.00 865.50 827.50 569.00 330.50 110.50 25.00 89.00 194.00 421.00 876.00 1210.50 6533.50
1965 1138.50 813.00 817.50 426.50 321.50 97.50 37.00 41.50 0.00 z 300.00 k 706.00 1038.00 5437.00
1966 1058.00 820.00 753.50 551.50 274.50 187.50 39.00 33.50 90.50 511.00 753.00 933.00 6005.00
1967 924.50 753.50 816.50 656.00 385.50 87.00 13.50 0.00 45.00 492.00 821.00 1109.00 6103.50
1968 1059.50 770.50 662.00 647.50 344.00 143.00 24.00 80.00 158.00 554.50 821.50 1127.50 6392.00
1969 1490.50 1036.50 781.00 506.50 237.50 83.50 53.00 85.50 203.50 637.50 850.96 d 1073.50 7039.46
1970 1162.00 766.50 792.50 685.50 371.50 104.00 35.50 26.50 345.50 601.50 873.50 1159.00 6923.50
1971 1074.50 879.50 969.78 a 625.50 269.00 256.00 79.00 21.00 305.00 587.50 857.00 1199.00 7122.78
1972 1219.50 1002.00 727.50 658.50 307.50 142.50 41.50 31.00 340.00 513.50 805.50 1257.50 7046.50
1973 1148.50 842.00 735.00 547.50 300.00 169.00 37.00 62.00 183.00 524.50 929.00 934.50 6412.00
1974 1276.50 782.50 794.50 564.00 466.00 133.50 60.00 35.50 107.50 457.00 800.50 985.50 6463.00
1975 1197.50 1031.50 850.50 683.00 385.50 193.50 26.00 81.50 114.50 539.50 880.00 1013.00 6996.00
1976 1039.00 912.50 880.50 588.00 359.00 248.00 37.50 89.00 80.50 504.50 855.00 1094.50 6688.00
1977 1362.50 811.50 842.50 463.50 464.00 62.00 75.50 44.50 275.00 539.50 922.50 1068.50 6931.50
1978 1113.00 829.00 686.00 552.50 424.00 114.50 28.00 110.00 242.50 486.00 1009.82 b 1295.00 6890.32
1979 1631.00 978.00 695.50 559.00 281.00 143.50 46.00 4.00 86.00 387.50 964.00 947.00 6722.50
1980 1340.00 916.00 812.00 445.00 320.00 229.50 40.50 95.50 187.00 482.00 809.00 950.50 6627.00
1981 905.00 832.50 675.50 594.50 357.50 244.66 a 71.50 23.00 208.00 592.00 738.00 1102.00 6344.16
1982 1269.50 915.00 767.00 654.50 382.00 116.00 75.00 42.50 209.00 592.50 976.50 1100.50 7100.00
1983 914.00 723.00 663.50 560.00 296.00 167.00 83.00 7.50 283.50 535.50 756.00 1391.50 6380.50
1984 1114.00 883.50 709.50 613.50 495.00 232.50 33.50 32.50 282.50 639.50 847.50 1322.00 7205.50
1985 1354.00 1130.50 837.00 500.50 300.00 119.50 1.00 47.00 325.50 581.00 1278.00 1471.50 7945.50
1986 1064.50 886.50 636.50 584.50 362.50 56.00 84.00 3.00 276.00 397.00 847.00 1115.50 6313.00
1987 1181.50 779.50 674.50 397.00 232.50 85.00 39.00 41.50 103.00 384.50 731.00 1175.50 5824.50
1988 1199.50 829.50 745.50 458.50 331.50 154.00 48.00 17.50 233.00 288.50 781.00 1126.50 6213.00
1989 1082.00 1154.00 823.50 431.00 313.50 69.00 29.50 56.50 102.00 497.00 742.50 1074.00 6374.50
1990 957.50 943.50 698.50 414.00 382.50 173.50 29.50 37.00 70.50 660.50 801.50 1394.50 6563.00
1991 1282.50 743.50 904.50 603.50 476.50 265.00 18.50 14.50 80.50 507.50 883.50 955.00 6735.00
1992 1005.00 747.50 585.50 494.50 269.00 69.00 37.00 63.50 259.00 468.50 884.00 1251.50 6134.00
1993 1376.00 1082.00 851.00 578.00 200.50 168.00 115.00 79.00 177.00 397.50 1016.50 1021.00 7061.50
1994 885.00 967.00 675.50 441.50 271.50 143.00 38.00 18.50 84.50 527.00 925.50 1027.50 6004.50
1995 1026.50 741.50 748.00 568.00 276.50 163.00 28.00 94.00 105.00 597.00 753.50 1073.50 6174.50
1996 1179.00 1051.00 825.50 516.00 453.50 169.00 31.00 42.00 263.50 544.50 917.00 1204.50 7196.50
1997 1119.00 857.00 754.50 609.50 269.50 192.00 45.50 11.50 123.50 509.00 757.50 1113.50 6362.00
1998 1009.00 707.00 697.00 519.50 307.50 103.50 0.00 27.00 78.00 494.00 731.00 1123.00 5796.50
1999 973.00 804.50 739.50 592.50 459.00 199.50 93.00 31.00 166.00 495.00 661.00 968.50 6182.50
2000 1075.00 829.50 778.50 460.00 337.00 149.50 52.50 50.50 234.50 526.50 1053.00 1198.50 6745.00
2001 1146.50 949.50 728.00 593.50 319.50 214.00 36.00 24.00 95.50 529.50 695.50 1062.00 6393.50
2002 1004.50 841.00 905.00 559.50 405.50 144.00 35.50 43.50 172.50 582.00 796.00 955.50 6444.50
2003 938.50 810.00 0.00 z 544.50 364.50 96.00 15.50 9.00 148.50 359.50 989.00 1043.00 5318.00
2004 1209.50 909.00 631.50 450.00 321.00 149.50 21.00 29.50 199.00 447.50 811.00 982.00 6160.50
2005 1116.00 803.50 671.00 517.00 271.50 167.00 10.50 23.00 226.00 453.00 902.50 1260.50 6421.50
2006 875.50 913.50 789.00 542.00 348.50 140.50 8.50 32.00 174.50 503.00 843.50 1170.00 6340.50
2007 1224.50 873.50 689.00 564.00 245.00 104.50 0.00 20.50 133.00 435.00 846.00 1108.50 6243.50
2008 1259.00 941.50 840.00 710.50 313.50 212.50 13.00 69.00 156.50 506.00 756.00 1332.00 7109.50
2009 1151.00 886.00 875.00 583.00 324.00 91.00 24.50 30.00 104.50 652.50 820.50 1260.00 6802.00
2010 889.50 738.00 707.00 574.50 459.00 209.50 56.00 54.00 175.00 440.50 923.00 1049.00 6275.00
2011 1077.50 978.00 775.50 716.00 447.50 210.50 64.00 8.00 112.00 495.00 874.00 1163.00 6921.00
2012 1109.00 875.50 802.00 516.00 391.50 204.11 b 21.00 25.50 86.50 510.00 769.00 1002.85 a 6312.96
2013 1260.00 849.50 746.07 a 20.00 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 2855.57
Period of Record Statistics
MEAN 1159.77 898.99 758.38 523.77 315.27 135.93 31.17 36.83 165.36 481.47 845.43 1103.09 6462.51
S.D. 191.19 141.54 85.31 88.92 82.69 54.32 23.68 25.44 74.17 84.47 105.79 133.92 459.14
SKEW 0.89 0.98 0.06 -0.26 0.01 0.32 1.07 0.78 0.50 -0.23 0.67 0.50 -0.04
MAX 1700.50 1371.00 969.78 716.00 495.00 265.00 115.00 110.00 345.50 660.50 1278.00 1471.50 7945.50
MIN 800.50 618.00 512.02 245.17 132.50 15.50 0.00 0.00 43.00 254.50 647.50 848.00 4906.19
NO YRS 96 98 95 96 96 97 96 96 93 95 96 94 84