WALLA WALLA FAA AIRPORT, WASHINGTON

Monthly Total Heating Degree Days

(458928)

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
1949 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 857.50 857.50
1950 1503.50 860.00 682.00 452.50 239.50 92.50 1.00 3.50 90.00 369.50 680.00 776.00 5750.00
1951 954.50 746.00 729.02 a 353.00 185.00 63.50 3.50 17.00 55.00 409.00 720.00 1085.00 5320.52
1952 1084.50 738.00 641.50 308.00 169.50 74.50 7.00 5.50 40.00 203.50 903.00 881.50 5056.50
1953 585.00 665.50 597.50 440.00 275.50 128.00 0.00 5.00 52.00 303.50 595.00 756.50 4403.50
1954 984.00 720.50 748.00 440.50 197.00 147.50 6.50 17.00 108.00 438.00 529.50 932.50 5269.00
1955 989.00 809.50 809.00 553.50 324.50 50.00 35.50 1.50 140.00 355.98 a 939.50 992.00 5999.98
1956 954.00 1093.00 657.00 322.00 179.00 97.50 0.00 23.00 65.50 415.00 840.00 880.50 5526.50
1957 1415.50 800.50 664.00 371.50 137.50 35.50 1.50 3.00 57.50 487.00 705.50 746.00 5425.00
1958 817.00 524.00 659.00 448.50 93.00 23.50 0.50 0.00 108.00 320.00 681.50 844.50 4519.50
1959 891.50 768.00 602.00 377.50 291.50 51.50 8.50 5.68 a 145.50 348.00 809.00 954.00 5252.68
1960 1212.50 752.50 625.50 381.00 278.00 49.00 0.00 38.00 59.00 318.50 670.50 1077.00 5461.50
1961 848.50 540.00 555.50 423.00 220.50 22.50 0.00 0.00 140.00 427.00 878.50 902.50 4958.00
1962 1012.00 755.00 691.00 325.50 324.00 80.00 14.00 17.00 67.50 365.50 591.00 794.50 5037.00
1963 1165.50 673.50 566.50 460.50 190.00 64.00 3.00 1.00 38.00 253.00 608.50 1008.53 a 5032.03
1964 748.00 662.00 624.00 459.00 242.00 57.50 6.50 26.00 124.00 444.00 730.50 991.00 5114.50
1965 888.00 618.50 653.50 288.50 219.50 28.00 3.00 8.50 101.00 204.50 565.50 829.50 4408.00
1966 830.50 701.00 587.00 374.00 176.00 81.50 16.50 8.00 31.50 349.50 610.00 756.00 4521.50
1967 689.00 608.50 642.50 541.50 231.00 19.50 0.00 0.00 27.00 286.00 685.00 872.50 4602.50
1968 840.50 646.50 494.00 477.50 206.00 56.50 0.00 20.50 80.50 362.50 631.00 1000.00 4815.50
1969 1303.00 827.00 588.50 391.50 123.50 24.00 0.00 5.50 56.00 444.50 635.00 902.00 5300.50
1970 961.50 657.00 615.50 518.50 169.00 58.00 0.00 0.00 169.50 441.50 684.00 873.50 5148.00
1971 770.50 695.50 693.00 462.50 200.50 142.00 25.00 8.50 197.00 456.00 645.50 887.00 5183.00
1972 1007.00 839.50 516.50 502.00 173.00 41.00 14.00 4.50 140.00 382.00 661.50 1127.50 5408.50
1973 1018.50 732.00 538.00 367.50 144.50 60.50 1.50 9.50 84.50 339.00 690.00 747.00 4732.50
1974 1102.50 615.00 596.50 416.50 278.00 31.50 13.00 0.00 22.50 288.00 589.00 724.50 4677.00
1975 899.50 767.00 649.50 477.00 179.00 47.00 1.50 21.00 38.00 316.00 635.50 810.00 4841.00
1976 816.50 743.00 691.00 462.50 215.00 115.50 3.00 23.50 22.50 331.00 648.00 894.00 4965.50
1977 1223.50 614.00 616.00 259.00 255.00 16.50 10.00 15.50 124.00 336.00 682.50 884.50 5036.50
1978 986.50 704.50 559.50 485.50 303.50 39.00 6.00 14.00 72.50 311.50 886.50 1022.00 5391.00
1979 1390.50 688.00 506.50 358.50 131.50 44.00 9.00 0.00 19.50 235.00 796.00 757.00 4935.50
1980 1147.00 787.00 658.00 276.00 192.00 96.00 1.50 19.00 56.50 382.50 623.50 760.50 4999.50
1981 839.50 703.00 535.50 367.50 210.50 64.50 9.50 0.00 70.00 307.00 577.00 840.50 4524.50
1982 921.00 657.50 571.50 457.50 201.00 42.50 6.00 0.00 105.50 355.00 762.00 837.50 4917.00
1983 680.00 548.50 474.00 372.00 189.50 46.50 16.00 0.00 140.00 336.50 520.00 1258.00 4581.00
1984 919.00 673.00 488.00 414.00 229.50 63.00 0.00 1.00 161.00 424.50 629.50 1087.00 5089.50
1985 1182.50 839.50 609.50 271.50 147.50 39.50 0.00 4.50 170.50 376.00 1139.00 1376.50 6156.50
1986 907.00 725.50 482.00 423.50 258.00 18.50 21.00 0.00 179.00 293.50 655.00 1029.50 4992.50
1987 1051.00 703.00 515.50 257.50 139.50 32.50 18.00 0.50 45.50 308.00 680.50 969.00 4720.50
1988 995.00 667.50 600.50 333.50 209.50 95.50 8.50 0.00 91.50 187.00 591.50 1000.00 4780.00
1989 872.50 1145.50 727.50 332.50 234.00 20.50 4.00 13.00 33.50 349.00 592.50 963.50 5288.00
1990 776.00 754.50 552.00 255.50 231.00 76.00 6.00 1.50 0.00 388.00 549.50 1200.00 4790.00
1991 1033.00 541.00 652.50 416.00 290.50 119.00 0.00 0.00 30.00 364.00 685.50 857.00 4988.50
1992 762.00 639.00 453.00 299.00 103.50 33.50 9.00 29.00 116.50 311.50 730.50 1005.00 4491.50
1993 1248.27 a 985.50 667.50 406.50 138.50 68.50 7.00 23.50 79.50 291.00 867.50 868.50 5651.77
1994 703.50 784.50 493.00 254.50 107.50 37.00 9.50 0.00 7.50 331.00 667.00 827.00 4222.00
1995 880.50 468.00 f 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 880.50
1996 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
1997 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
1998 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
1999 0.00 z 0.00 z 598.00 458.28 a 299.00 84.00 10.85 a 17.00 93.00 398.87 a 563.04 b 825.50 3347.53
2000 898.00 736.50 623.10 a 295.50 187.50 51.50 4.65 a 2.00 122.50 416.50 879.00 1037.47 a 5254.22
2001 979.50 796.00 592.50 480.50 202.50 105.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3156.50
2002 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
2003 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
2004 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
2005 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
2006 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
2007 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
2008 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
2009 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
2010 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
2011 845.50 745.00 561.50 343.50 k 283.50 76.00 1.66 c 0.53 b 21.50 322.00 654.50 972.50 4484.20
2012 870.07 a 766.00 605.50 349.66 a 225.50 97.50 3.00 0.00 22.50 331.00 574.50 720.00 4565.22
2013 1003.00 630.50 508.00 10.50 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 2141.50
Period of Record Statistics
MEAN 968.75 727.87 603.29 392.23 208.63 62.18 6.66 8.44 82.08 347.21 691.19 920.03 5023.51
S.D. 193.81 120.39 77.24 80.52 58.28 33.17 7.45 9.76 50.75 66.98 123.10 140.36 418.28
SKEW 0.71 1.29 0.17 -0.07 0.09 0.75 1.68 1.04 0.42 -0.27 1.36 0.97 0.48
MAX 1503.50 1145.50 809.00 553.50 324.50 147.50 35.50 38.00 197.00 487.00 1139.00 1376.50 6156.50
MIN 585.00 524.00 453.00 254.50 93.00 16.50 0.00 0.00 0.00 187.00 520.00 720.00 4222.00
NO YRS 51 50 51 49 50 50 49 49 49 49 49 50 47