RITZVILLE, WASHINGTON

Monthly Total Heating Degree Days

(457059)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 47.07 a 51.50 37.00 68.00 m 463.00 844.50 1309.00 2752.07
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 875.50 913.50 789.00 542.00 348.50 130.71 b 1.50 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3599.21
Period of Record Statistics
MEAN 1156.88 884.13 767.50 537.50 330.63 140.56 38.93 41.92 171.64 497.57 849.27 1104.59 6521.48
S.D. 196.90 124.58 82.53 78.36 77.10 54.54 24.61 27.81 79.70 81.38 115.42 129.89 444.46
SKEW 0.91 0.69 0.28 -0.07 0.03 0.42 0.85 0.60 0.41 -0.60 0.89 0.69 0.42
MAX 1700.50 1272.50 969.78 685.50 495.00 265.00 115.00 110.00 345.50 660.50 1278.00 1471.50 7945.50
MIN 800.50 618.00 585.50 393.00 150.00 47.07 0.00 0.00 45.00 259.50 648.00 894.72 5606.95
NO YRS 58 58 57 58 58 59 58 57 55 57 58 58 53