WALLA WALLA RGNL AP, WA

Monthly Sum of Heating Degree Days (Degrees Fahrenheit)

(458928)

Base Temperature = 65 F

File last updated on Mar 27, 2015
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.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
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)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
19491467.50 842.50 639.00 256.50 110.00 50.50 1.11d1.50 62.00 467.00 543.00 857.50 5298.11
19501503.50 698.76c682.00 452.50 239.50 92.50 1.00 3.50 90.00 369.50 680.00 776.00 5588.76
1951954.50 746.00 724.00 353.00 185.00 63.50 3.50 17.00 55.00 409.00 720.00 1085.00 5315.50
19521084.50 738.00 641.50 308.00 169.50 74.50 7.00 5.50 40.00 203.50 903.00 881.50 5056.50
1953585.00 665.50 597.50 440.00 275.50 128.00 0.00 5.00 52.00 303.50 595.00 756.50 4403.50
1954984.00 720.50 748.00 440.50 197.00 147.50 6.50 17.00 108.00 438.00 529.50 932.50 5269.00
1955989.00 809.50 809.00 553.50 324.50 50.00 35.50 1.50 140.00 356.00 939.50 992.00 6000.00
1956954.00 1093.00 657.00 322.00 179.00 97.50 0.00 23.00 65.50 415.00 840.00 880.50 5526.50
19571415.50 800.50 664.00 371.50 137.50 35.50 1.50 3.00 39.88b487.00 705.50 746.00 5407.38
1958817.00 524.00 659.00 448.50 93.00 22.79b0.50 0.00 108.00 320.00 681.50 844.50 4518.79
1959891.50 768.00 602.00 377.50 291.50 51.50 8.50 13.50 145.50 348.00 809.00 954.00 5260.50
19601212.50 752.50 625.50 381.00 278.00 49.00 0.00 38.00 59.00 318.50 670.50 1077.00 5461.50
1961848.50 540.00 555.50 423.00 220.50 22.50 0.00 0.00 140.00 427.00 878.50 902.50 4958.00
19621012.00 755.00 691.00 325.50 324.00 80.00 14.00 17.00 67.50 365.50 591.00 794.50 5037.00
19631165.50 673.50 566.50 460.50 190.00 64.00 3.00 1.00 38.00 253.00 608.50 993.50 5017.00
1964748.00 662.00 624.00 459.00 242.00 57.50 6.50 26.00 124.00 444.00 730.50 991.00 5114.50
1965888.00 618.50 653.50 288.50 219.50 28.00 3.00 8.50 101.00 204.50 565.50 829.50 4408.00
1966830.50 701.00 587.00 374.00 176.00 81.50 16.50 8.00 31.50 349.50 610.00 756.00 4521.50
1967689.00 608.50 642.50 541.50 231.00 19.50 0.00 0.00 27.00 286.00 685.00 872.50 4602.50
1968840.50 646.50 494.00 477.50 206.00 56.50 0.00 20.50a80.50 362.50 631.00 1000.00 4815.50
19691303.00 827.00 588.50 391.50 123.50 24.00 0.00 5.50 56.00 444.50 635.00 902.00 5300.50
1970961.50 657.00 615.50 518.50 169.00 58.00 0.00 0.00 169.50 441.50 684.00 873.50 5148.00
1971770.50 695.50 693.00 462.50 200.50 142.00 25.00 8.50 197.00 456.00 645.50 887.00 5183.00
19721007.00 839.50 516.50 502.00 173.00 41.00 14.00 4.50 140.00 382.00 661.50 1127.50 5408.50
19731018.50 732.00 538.00 367.50 144.50 60.50 1.50 9.50 84.50 339.00 690.00 747.00 4732.50
19741102.50 615.00 596.50 416.50 278.00 31.50 13.00 0.00 22.50 288.00 589.00 724.50 4677.00
1975899.50 767.00 649.50 477.00 179.00 47.00 1.50 21.00 38.00 316.00 635.50 810.00 4841.00
1976816.50 743.00 691.00 462.50 215.00 115.50 3.00 23.50 22.50 331.00 648.00 894.00 4965.50
19771223.50 614.00 616.00 259.00 255.00 16.50 10.00 15.50 124.00 336.00 682.50 884.50 5036.50
1978986.50 704.50 559.50 485.50 303.50 39.00 6.00 14.00 72.50 311.50 886.50 1022.00 5391.00
19791390.50 688.00 506.50 358.50 131.50 44.00 9.00 0.00 19.50 235.00 796.00 757.00 4935.50
19801147.00 787.00 658.00 276.00 192.00 96.00 1.50 19.00 56.50 382.50 623.50 760.50 4999.50
1981839.50 703.00 535.50 367.50 210.50 64.50 9.50 0.00 70.00 307.00 577.00 840.50 4524.50
1982921.00 657.50 571.50 457.50 201.00 42.50 6.00 0.00 105.50 355.00 762.00 837.50 4917.00
1983680.00 548.50 474.00 372.00 189.50 46.50 16.00 0.00 140.00 336.50 520.00 1258.00 4581.00
1984919.00 673.00 488.00 414.00 229.50 63.00 0.00 1.00 161.00 424.50 629.50 1087.00 5089.50
19851182.50 839.50 609.50 271.50 147.50 39.50 0.00 4.50 170.50 376.00 1139.00 1376.50 6156.50
1986907.00 725.50 482.00 423.50 258.00 18.50 21.00 0.00 179.00 293.50 655.00 1029.50 4992.50
19871051.00 703.00 515.50 257.50 139.50 32.50 18.00 0.50 45.50 308.00 644.00a950.50a4665.50
1988995.00 667.50 600.50 333.50 209.50 95.50 8.50 0.00 91.50 187.00 591.50 1000.00 4780.00
1989872.50 1075.50a727.50 332.50 234.00 20.50 4.00 13.00 33.50 349.00 592.50 963.50 5218.00
1990776.00 754.50 552.00 255.50 231.00 76.00 6.00 1.50 0.00 388.00 549.50 1200.00 4790.00
19911033.00 541.00 652.50 416.00 290.50 119.00 0.00 0.00 30.00 364.00 685.50 857.00 4988.50
1992762.00 639.00 453.00 299.00 103.50 33.50 9.00 29.00 116.50 311.50 730.50 1005.00 4491.50
19931237.76b985.50 667.50 406.50 138.50 68.50 7.00 23.50 79.50 291.00 867.50 868.50 5641.26
1994703.50 784.50 493.00 254.50 107.50 37.00 9.50 0.00 7.50 331.00 667.00 827.00 4222.00
1995880.50 468.00f-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z880.50k
1996-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z0.00l
1997-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z0.00l
1998-----z-----z-----z-----z-----z-----z-----z-----z-----z164.50u557.50 866.50 1424.00j
1999711.00 612.50 598.00 463.00 299.00 84.00 10.50 17.00 93.00 389.50 543.00 825.50 4646.00
2000877.24b736.50 617.50 295.50 187.50 51.50 4.50 2.00 122.50 416.50 879.00 1047.00 5237.24
2001979.50 796.00 592.50 480.50 202.50 105.50 7.00a2.00 35.00 388.50 656.50 856.00 5101.50
2002834.00 697.00 707.50 389.00a259.00 66.50 3.00 6.00 84.50 456.00a707.50 787.50 4997.50
2003743.50 716.50 468.10b415.00 217.00 20.00 0.00a0.00 59.00 266.00 766.50 916.00 4587.60
20041050.00a682.50 389.50 282.00 217.50 76.50 0.00 3.00 73.50 316.00 681.00 839.00 4610.50
2005917.00a710.00 483.50 355.00 139.00 62.50 0.00 0.00 74.50 292.00 733.50 1045.00 4812.00
2006652.50 755.00 585.00 395.00 204.00 23.50 0.00 6.00 87.50 396.50 634.50 976.50 4716.00
20071021.50 706.50 502.00 376.00 135.00 41.00 0.00 5.00 80.00 391.50 699.00 828.50 4786.00
2008917.00a663.00 653.50 496.00 171.50 91.50 0.00 10.00 61.50 393.50 617.50 1062.50a5137.50
2009927.00 782.00 699.00 394.50 168.50 15.00 0.00 1.50 35.00 455.50 593.50 1113.50 5185.00
2010732.50 604.00 546.50 402.00 296.50 65.50 3.00 15.00 45.00 314.00 756.50 917.00 4697.50
2011845.50 745.00 561.50 528.50 283.50 76.00 1.55b0.52b21.50 322.00 654.50 972.50 5012.57
2012869.00 766.00 605.50 356.50 225.50 97.50 3.00 0.00 22.50 348.50 602.50 772.00 4668.50
20131006.00 655.50 524.00 381.50 150.00 40.50 0.00 0.00 75.00a424.00 739.00 990.52b4986.02
2014889.50 840.00 533.00 363.50 114.00 32.50 0.00 0.00 34.50 178.00 759.50 816.50 4561.00
2015858.00 533.00 415.96e-----z-----z-----z-----z-----z-----z-----z-----z-----z1806.96i
Period of Record Statistics
MEAN954.66 719.55 593.58 391.38 203.44 59.58 5.48 7.61 77.60 350.97 687.06 921.34 4983.85
S.D.196.73 108.92 84.64 78.34 58.75 31.90 7.05 9.12 46.73 70.79 114.05 131.82 379.20
SKEW0.85 1.09 -0.08 -0.04 0.17 0.79 1.93 1.22 0.64 -0.36 1.36 0.98 0.63
MAX1503.50 1093.00 809.00 553.50 324.50 147.50 35.50 38.00 197.00 487.00 1139.00 1376.50 6156.50
MIN585.00 524.00 389.50 254.50 93.00 15.00 0.00 0.00 0.00 178.00 520.00 724.50 4222.00
YRS64.00 63.00 63.00 62.00 62.00 62.00 62.00 62.00 62.00 62.00 63.00 63.00 62.00