PULLMAN EXP STN, WASHINGTON

Monthly Total Heating Degree Days

(456784)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 195402
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
1893 0.00 z 0.00 z 0.00 z 0.00 z 455.50 292.50 123.00 68.50 280.50 651.50 897.00 921.50 3690.00
1894 1202.50 1080.15 b 904.17 a 599.50 368.90 a 249.50 35.00 44.50 322.00 552.50 685.50 1079.50 7123.72
1895 1165.00 851.00 832.00 504.50 421.50 224.00 0.00 z 0.00 z 0.00 z 0.00 z 864.00 1076.00 5938.00
1896 1015.00 827.02 a 893.00 661.50 539.50 185.50 6.50 54.50 266.00 509.50 1055.00 836.50 6849.52
1897 1120.50 906.50 1055.00 506.50 208.00 184.50 126.50 32.50 240.00 510.00 850.00 1067.00 6807.00
1898 1245.50 777.50 969.50 509.50 387.50 170.50 72.50 21.00 168.00 587.00 940.00 1225.50 7074.00
1899 1056.00 1110.00 902.50 657.50 506.50 252.00 32.00 153.50 133.00 586.00 620.00 989.50 6998.50
1900 886.50 916.46 b 624.65 a 482.00 305.00 95.00 73.22 b 148.80 a 275.50 0.00 z 0.00 z 0.00 z 3807.14
1901 1056.87 d 871.63 a 747.62 a 611.00 282.50 288.62 a 50.24 b 0.00 z 126.00 q 257.00 h 0.00 z 0.00 z 3908.48
1902 735.50 i 830.26 e 822.50 556.55 a 362.00 229.14 a 132.30 c 69.00 206.00 394.73 a 898.85 d 1040.64 b 5541.97
1903 1031.00 993.50 839.14 b 601.03 a 385.12 e 55.71 b 101.61 d 65.50 j 291.43 b 243.50 m 796.80 e 1005.84 c 6101.18
1904 1052.40 b 943.54 a 899.55 c 443.89 c 361.50 144.50 h 50.00 f 24.50 p 133.80 e 261.50 i 389.50 j 958.93 a 4793.61
1905 819.00 f 956.31 b 678.26 b 457.78 c 385.71 e 77.00 r 23.50 f 52.18 a 190.34 a 668.50 789.50 999.50 5178.08
1906 990.50 827.00 818.92 a 363.00 340.00 230.50 0.00 53.22 a 181.03 a 328.00 k 873.00 934.65 a 5611.82
1907 1405.50 841.08 b 801.50 352.00 i 0.00 z 171.43 b 0.00 o 0.00 z 0.00 z 257.82 a 715.50 921.00 5113.82
1908 1003.76 b 943.62 c 780.88 b 527.59 a 457.00 224.46 b 22.39 d 56.00 186.21 a 528.00 679.29 b 1086.50 6495.69
1909 1219.69 b 343.50 q 550.50 g 712.50 d 443.00 0.00 z 79.00 i 52.59 c 189.00 498.98 e 698.50 f 1193.00 4308.76
1910 1219.16 b 708.00 i 589.00 e 390.50 257.50 189.31 a 21.00 101.86 c 224.50 420.57 a 515.50 j 977.02 a 4390.41
1911 1122.89 d 1067.11 a 753.00 604.00 490.66 b 145.50 35.50 k 33.58 a 275.50 552.32 a 880.86 a 1036.00 6961.42
1912 1071.57 a 914.00 950.50 600.00 a 345.00 94.50 t 50.50 l 130.09 c 293.50 660.00 846.67 c 1024.66 c 6835.98
1913 1272.50 1232.54 b 1004.50 594.00 401.34 c 72.00 34.88 c 22.50 153.10 a 646.00 883.50 1092.00 7408.86
1914 930.50 950.00 658.50 523.50 274.00 212.50 0.00 c 34.88 c 319.00 477.00 756.00 1287.00 6422.88
1915 1235.00 919.50 661.00 443.50 365.50 180.50 72.50 1.00 167.00 410.50 904.44 c 1042.50 6402.94
1916 1528.41 c 996.50 769.50 571.50 536.41 c 271.50 106.00 69.50 245.00 550.50 961.07 b 1281.50 7887.39
1917 1222.00 1015.50 1076.98 b 712.24 a 425.00 229.29 b 16.50 3.00 123.00 453.00 618.00 771.50 6666.01
1918 991.00 984.00 771.00 548.00 301.00 i 99.83 a 32.00 87.00 55.96 d 375.74 b 792.00 1049.50 5786.03
1919 993.50 941.00 781.00 526.50 430.00 189.00 24.00 32.00 219.50 729.00 921.00 1328.50 7115.00
1920 1048.00 926.50 878.00 687.00 480.00 248.00 21.50 84.00 212.00 627.50 818.00 1015.50 7046.00
1921 1080.00 905.50 801.50 633.33 c 326.50 95.00 50.00 27.00 377.50 431.00 763.00 1059.50 6549.83
1922 1402.50 1132.00 961.53 b 702.50 388.00 46.50 5.50 43.50 146.50 417.50 972.50 1248.00 7466.53
1923 996.00 1144.50 830.00 539.50 362.50 267.00 43.00 42.00 165.50 571.00 756.00 1026.50 6743.50
1924 1193.00 752.00 831.00 540.50 182.50 122.00 68.20 a 159.50 0.00 z 497.50 h 845.50 1289.50 5983.70
1925 982.50 728.50 746.50 449.50 234.00 165.50 2.21 c 69.75 a 178.00 563.88 b 818.28 a 925.35 a 5863.97
1926 1100.00 732.50 675.50 367.50 333.77 a 146.00 11.37 a 55.50 392.50 362.00 g 724.00 1115.43 d 5654.06
1927 1149.50 845.50 643.50 g 646.55 a 496.50 127.50 37.50 58.00 322.00 450.50 727.24 a 1317.50 a 6178.29
1928 1109.50 929.00 716.00 625.50 188.50 231.21 a 32.00 35.50 m 184.50 509.00 801.00 1090.00 6416.21
1929 1443.50 1258.50 788.50 669.00 354.50 348.00 16.61 c 8.50 290.50 387.00 829.00 892.00 7285.61
1930 1593.50 744.00 727.50 389.50 375.00 206.00 21.00 15.50 185.00 623.50 843.50 1187.50 6911.50
1931 1005.50 905.50 855.00 583.50 294.00 192.41 a 23.50 28.00 234.00 483.00 988.50 1090.00 6682.91
1932 1164.00 1083.00 833.50 512.00 336.50 122.00 71.00 76.00 182.00 486.50 671.00 1215.50 6753.00
1933 1067.00 1187.50 819.50 547.00 453.00 138.00 24.50 60.00 278.50 375.00 714.00 788.50 6452.50
1934 793.50 632.50 534.50 293.50 212.00 131.50 49.00 24.50 292.50 0.00 z 649.50 1005.50 4618.50
1935 1044.50 821.50 896.00 635.69 a 346.50 149.00 72.50 67.50 113.50 569.37 a 608.00 l 1044.00 5760.06
1936 1043.15 a 1391.50 860.00 434.00 208.00 126.50 10.85 a 28.50 222.00 388.50 846.50 949.50 6509.00
1937 1674.52 a 984.50 700.50 635.50 293.00 166.50 22.00 91.00 172.00 391.50 712.50 960.00 6803.52
1938 1030.00 896.00 793.00 530.50 353.50 108.00 30.00 54.50 80.00 460.50 921.50 980.00 6237.50
1939 926.00 996.00 772.00 463.50 264.50 229.50 42.50 18.50 166.50 481.50 590.50 812.00 5763.00
1940 1035.50 790.00 648.00 484.50 216.00 93.50 20.00 10.00 152.00 392.00 955.00 910.00 5706.50
1941 983.50 740.50 620.00 445.50 362.00 209.50 2.00 66.00 346.00 543.00 702.00 982.00 6002.00
1942 1261.00 922.50 797.50 467.50 450.50 271.00 29.00 70.00 157.50 436.50 876.00 989.00 6728.00
1943 1329.50 845.50 877.00 471.00 449.50 272.50 44.43 a 57.00 0.00 z 457.50 768.00 1051.00 6622.93
1944 1024.00 973.50 906.00 505.50 285.00 176.50 41.00 61.50 178.00 280.00 842.00 881.50 g 5273.00
1945 977.00 830.00 875.50 641.50 300.00 240.00 15.00 34.00 289.50 393.00 872.50 1071.00 6539.00
1946 1057.00 883.50 761.50 507.50 296.00 218.00 37.50 36.68 a 235.50 673.00 866.50 968.50 6541.18
1947 1197.63 a 802.00 681.00 514.50 206.00 215.00 31.00 50.00 201.50 484.00 872.50 960.50 6215.63
1948 1094.00 1007.00 890.00 621.50 416.00 91.00 100.00 54.77 a 230.69 a 413.00 f 872.68 b 1256.02 a 6633.65
1949 1671.50 1019.50 773.50 444.31 a 260.50 172.50 61.50 45.50 147.00 634.50 494.50 g 1048.50 6278.81
1950 1563.00 922.44 a 859.50 631.50 426.50 191.50 41.50 32.00 164.50 472.00 779.50 830.00 6913.94
1951 1103.00 861.50 919.00 492.50 345.00 182.50 37.50 67.00 146.00 536.50 834.50 1166.24 b 6691.24
1952 1216.00 936.50 862.50 446.00 301.50 183.00 54.00 55.00 111.00 246.50 879.50 980.00 6271.50
1953 778.50 799.50 765.00 579.50 413.50 281.00 47.00 67.50 142.50 355.50 655.34 a 894.50 5779.34
1954 1081.50 757.50 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 1839.00
Period of Record Statistics
MEAN 1139.93 928.54 807.59 539.77 355.01 186.08 42.56 55.28 211.35 492.94 814.74 1040.43 6658.56
S.D. 195.07 142.49 110.89 94.88 90.62 65.57 32.67 34.52 73.61 109.87 103.27 133.86 493.76
SKEW 1.04 0.81 -0.03 -0.19 -0.03 -0.05 1.12 1.22 0.41 -0.06 -0.20 0.34 0.04
MAX 1674.52 1391.50 1076.98 712.50 539.50 348.00 132.30 159.50 392.50 729.00 1055.00 1328.50 7887.39
MIN 778.50 632.50 534.50 293.50 182.50 46.50 0.00 1.00 55.96 246.50 590.50 771.50 5706.50
NO YRS 59 59 58 59 59 57 54 55 56 51 54 58 36