COLVILLE AP, WASHINGTON

Monthly Total Heating Degree Days

(451650)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 198710
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
1937 0.00 z 0.00 z 699.00 563.00 288.00 128.00 15.00 76.00 154.50 433.00 828.10 a 1078.00 4262.60
1938 1133.50 954.50 799.50 519.00 308.00 68.00 14.98 a 60.00 70.50 506.50 1020.00 1168.18 a 6622.67
1939 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
1940 1227.50 959.50 711.00 500.00 228.50 62.50 13.50 14.50 126.00 357.00 i 1041.50 1112.00 5996.50
1941 1098.50 860.00 178.50 w 411.00 329.50 124.00 0.50 76.00 337.00 605.00 813.50 1065.50 5720.50
1942 1331.00 943.50 814.00 495.00 403.00 202.50 b 34.50 45.00 159.00 537.50 998.00 617.50 n 5963.00
1943 1489.50 974.00 979.50 472.00 443.00 206.50 47.00 50.78 b 134.50 542.50 891.00 1205.50 7435.78
1944 1273.00 1050.00 904.00 525.50 278.50 109.00 42.50 27.56 d 186.50 412.50 891.50 1234.00 6934.56
1945 1123.00 911.50 848.00 652.00 282.00 182.00 16.50 26.02 c 289.50 519.00 960.00 1164.00 6973.52
1946 1211.00 979.00 790.50 462.50 252.00 199.00 26.00 35.00 244.00 696.50 990.50 1158.00 7044.00
1947 1345.00 903.00 727.50 521.90 a 221.00 164.50 39.50 71.50 206.50 524.50 944.50 1113.50 6782.90
1948 1275.50 1086.50 883.00 622.50 350.00 45.50 0.00 z 58.50 249.31 a 620.00 907.50 1415.67 a 7513.98
1949 1776.00 1201.50 857.50 461.00 221.00 150.00 d 51.50 23.77 a 153.00 654.50 0.00 z 0.00 z 5549.77
1950 1747.00 988.81 a 963.00 0.00 z 384.92 a 140.00 30.50 9.00 166.55 a 606.16 c 924.00 1014.00 6973.94
1951 1236.00 1018.50 979.50 551.38 a 298.50 141.43 b 28.50 i 46.50 d 197.50 606.50 913.50 1419.50 7408.81
1952 1287.50 1044.00 946.00 491.00 253.17 a 142.00 34.74 b 44.00 112.00 420.00 1013.00 1050.50 6837.91
1953 865.00 848.50 782.50 590.00 359.00 213.89 c 22.50 47.50 190.00 f 492.00 793.00 1049.50 6063.39
1954 1263.50 862.30 a 889.50 642.00 324.00 218.50 43.00 87.50 256.50 641.00 737.50 1105.00 7070.30
1955 1168.00 1097.00 1079.83 a 692.00 462.50 143.50 57.57 c 25.50 247.50 583.00 1123.50 1289.50 7969.40
1956 1182.50 1222.50 913.00 463.50 223.50 184.50 31.00 57.00 186.50 582.00 1016.00 1126.50 7188.50
1957 1407.00 f 1086.30 a 842.00 513.00 156.00 127.50 46.50 70.27 a 124.14 a 640.00 983.00 1037.50 5626.20
1958 1060.50 763.00 802.00 594.00 150.00 52.24 a 9.00 10.50 273.50 563.50 1013.00 1114.00 6405.24
1959 1209.00 1033.00 816.00 498.00 420.50 142.00 55.50 74.50 271.50 618.00 1084.00 1169.00 7391.00
1960 1367.50 1013.00 834.50 554.00 413.00 107.00 1.50 108.00 177.50 517.50 916.00 1180.50 7190.00
1961 584.50 n 801.00 773.00 584.00 327.00 71.00 9.50 3.50 307.50 647.00 1047.50 1240.50 5811.50
1962 1415.50 966.50 926.00 476.00 393.50 170.00 83.50 73.50 181.50 558.00 786.00 969.50 6999.50
1963 1352.00 830.00 745.00 579.00 332.50 148.00 46.00 43.50 102.00 493.00 876.50 1199.50 6747.00
1964 1145.50 1086.00 953.00 616.50 386.00 145.50 46.00 127.50 345.50 588.50 942.00 1344.50 7726.50
1965 1151.50 985.00 1004.50 511.50 408.00 150.00 51.00 71.00 363.00 491.00 840.00 1087.50 7114.00
1966 1198.50 919.50 813.00 570.00 302.00 224.00 46.00 50.50 88.50 601.50 847.00 983.00 6643.50
1967 1044.50 821.50 839.00 667.00 375.00 83.00 24.50 7.00 70.00 562.00 887.00 1225.00 6605.50
1968 1198.00 843.00 721.00 640.50 381.50 181.50 26.50 86.00 229.50 669.50 899.00 1313.50 7189.50
1969 1521.50 1052.50 846.00 522.00 238.00 88.50 63.50 55.50 220.00 655.00 893.50 1099.50 7255.50
1970 1246.50 893.00 844.50 641.00 311.50 107.00 15.00 11.50 353.00 656.00 956.50 1228.00 7263.50
1971 1198.00 950.00 952.00 570.50 280.50 220.00 86.00 21.50 342.50 661.50 889.00 1334.00 7505.50
1972 1347.50 1017.50 751.00 671.50 285.00 154.14 a 76.50 33.00 357.00 625.00 854.50 1252.50 7425.14
1973 1259.50 893.50 754.00 553.50 315.50 170.00 23.50 50.00 202.50 597.00 963.00 1026.50 6808.50
1974 1264.00 864.00 815.50 519.50 440.00 97.50 51.00 44.50 208.50 589.50 843.00 1041.00 6778.00
1975 1319.50 1105.00 941.50 653.00 343.50 174.50 8.50 85.50 j 188.00 604.00 980.50 1105.50 7423.50
1976 1174.00 1006.50 954.50 587.50 358.00 234.50 48.88 e 92.50 149.50 619.50 931.00 1198.15 a 7354.53
1977 1431.50 902.00 834.50 465.00 426.50 67.00 49.50 58.50 p 316.07 b 637.00 1017.00 1287.50 7433.57
1978 1265.00 936.50 805.50 401.00 g 408.00 121.00 18.00 112.50 305.00 0.00 z 330.00 u 1476.50 5448.00
1979 1657.00 1039.50 776.50 578.00 299.50 104.50 36.00 0.00 126.00 467.58 a 1041.00 946.00 7071.58
1980 1406.50 936.00 833.00 412.50 232.00 157.00 29.50 92.00 222.00 261.50 l 725.00 g 1016.00 5336.50
1981 993.00 839.50 683.00 545.00 319.00 216.50 70.00 19.00 220.50 634.50 827.50 1137.00 6504.50
1982 1248.00 969.50 771.50 629.50 337.50 70.00 73.00 29.00 206.50 584.50 987.00 1165.00 7071.00
1983 996.00 784.00 663.00 523.50 273.00 143.00 93.00 2.00 320.50 576.00 770.00 1470.50 6614.50
1984 1151.50 920.00 709.00 572.00 431.00 183.50 26.50 43.00 327.00 688.50 878.50 1451.00 7381.50
1985 1303.00 1129.50 868.50 493.50 248.00 107.50 0.00 43.50 320.00 614.00 1340.00 1348.50 7816.00
1986 1080.50 952.00 660.00 577.00 316.50 57.00 75.50 0.00 296.00 521.50 874.50 1102.50 6513.00
1987 1129.00 825.00 678.50 377.50 215.50 65.50 32.50 41.50 116.50 527.50 0.00 z 0.00 z 4009.00
Period of Record Statistics
MEAN 1258.87 960.57 832.20 548.56 320.67 139.31 38.39 47.88 220.57 578.52 934.22 1176.99 7065.71
S.D. 179.01 105.50 98.23 73.34 76.10 52.05 23.55 31.32 83.86 69.77 106.15 136.78 387.21
SKEW 0.86 0.33 0.25 -0.09 -0.14 -0.04 0.42 0.45 0.05 -0.59 1.10 0.56 0.34
MAX 1776.00 1222.50 1079.83 692.00 462.50 234.50 93.00 127.50 363.00 696.50 1340.00 1476.50 7969.40
MIN 865.00 763.00 660.00 377.50 150.00 45.50 0.00 0.00 70.00 412.50 737.50 946.00 6405.24
NO YRS 47 49 49 48 50 50 48 48 49 47 46 47 34