KALISPELL WSO AIRPORT, MONTANA

Monthly Total Heating Degree Days

(244558)

Base Temperature = 65 F

File last updated on Jul 24, 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
1899 0.00 z 0.00 z 0.00 z 0.00 z 538.50 290.00 86.50 276.00 300.00 726.00 777.50 1200.50 4195.00
1900 1070.00 1150.50 798.00 511.00 389.00 148.00 112.00 218.00 393.00 665.50 1114.50 1048.50 7618.00
1901 1371.50 1173.00 916.00 679.50 328.50 409.00 71.50 38.50 479.00 532.50 848.50 1148.50 7996.00
1902 1332.00 1059.50 946.00 714.50 419.50 319.00 185.50 128.00 425.50 582.50 979.00 1246.50 8337.50
1903 1157.00 1244.50 1001.50 717.50 532.50 120.00 171.00 107.00 425.00 636.00 1087.50 1221.50 8421.00
1904 1162.50 1142.50 1104.00 575.50 415.50 270.50 67.00 160.50 280.00 611.00 786.50 1072.50 7648.00
1905 1267.00 1310.00 792.00 608.50 466.00 278.50 56.50 79.50 263.00 813.00 1010.50 1269.50 8214.00
1906 1201.00 1031.50 1090.00 531.00 433.50 289.50 4.00 87.00 277.00 553.00 996.50 1173.50 7667.50
1907 1649.50 1109.00 973.00 730.00 414.50 272.00 84.00 204.00 371.50 500.50 873.50 1169.00 8350.50
1908 1261.00 1127.50 972.50 590.00 493.00 265.00 59.50 142.50 279.00 671.00 910.50 1236.50 8008.00
1909 1587.50 1067.50 940.50 792.50 506.00 193.00 130.50 117.00 290.50 623.00 884.50 1422.00 8554.50
1910 1318.00 1311.50 742.50 515.00 319.00 178.00 28.00 196.00 383.50 558.00 902.50 1100.50 7552.50
1911 1337.50 1120.00 823.50 688.00 504.50 170.00 114.50 159.00 425.00 702.50 1181.50 1325.00 8551.00
1912 1396.00 1076.50 1147.00 577.50 381.50 150.50 154.50 172.50 499.50 730.50 881.50 1169.50 8337.00
1913 1451.50 1343.50 1191.00 663.00 437.00 149.00 146.50 107.50 349.00 794.50 888.50 1247.50 8768.50
1914 1110.00 1195.50 917.00 608.50 370.00 247.50 31.50 113.50 372.50 673.50 856.50 1424.50 7920.50
1915 1387.00 1025.00 866.00 482.50 423.00 277.00 166.50 0.00 407.50 583.00 982.50 1292.50 7892.50
1916 1876.50 1178.00 919.50 644.00 555.00 304.50 105.50 118.50 369.50 759.00 1108.50 1553.00 9491.50
1917 1390.50 1205.00 1201.50 762.50 426.00 291.00 30.50 86.50 244.50 666.00 863.50 1202.50 8370.00
1918 1337.00 1209.00 895.00 672.50 519.00 141.50 97.00 174.00 246.00 559.00 965.50 1143.50 7959.00
1919 1185.00 1173.50 998.50 556.00 442.50 194.50 38.50 57.50 331.00 886.00 1148.00 1467.50 8478.50
1920 1264.00 1133.50 1049.00 776.00 526.00 286.50 17.50 119.50 321.50 700.00 973.00 1150.00 8316.50
1921 1205.50 973.50 982.50 686.00 371.00 136.50 64.00 70.50 487.50 575.50 1041.00 1363.00 7956.50
1922 1491.50 1387.50 1088.00 747.00 454.00 73.50 56.50 55.50 218.50 539.00 1047.50 1447.50 8606.00
1923 1167.50 1342.00 1003.00 671.50 441.50 219.50 36.00 74.50 240.50 649.50 938.50 1255.00 8039.00
1924 1460.50 930.50 959.00 664.00 298.00 258.50 76.50 142.50 340.00 629.50 1017.00 1560.00 8336.00
1925 1169.00 816.50 903.00 541.50 331.50 210.50 12.50 143.00 337.00 825.00 951.50 981.50 7222.50
1926 1252.00 870.50 819.50 532.00 406.50 180.50 29.00 109.50 561.00 581.00 903.00 1287.50 7532.00
1927 1375.50 1073.50 967.50 723.50 527.50 188.00 61.50 93.00 364.00 598.00 907.00 1590.00 8469.00
1928 1293.00 1170.00 874.50 735.50 271.50 261.50 78.50 157.50 300.50 676.00 919.50 1332.50 8070.50
1929 1699.00 1411.50 907.00 737.00 437.50 232.00 49.00 17.50 401.50 606.50 1021.50 1136.50 8656.50
1930 1848.00 914.50 960.00 468.50 424.50 228.50 41.00 31.50 247.50 734.00 1060.50 1256.50 8215.00
1931 1154.50 1038.00 908.00 615.50 323.50 147.50 46.00 44.00 335.00 642.50 1133.50 1221.50 7609.50
1932 1403.50 1140.00 1128.00 626.50 382.50 158.00 55.50 89.50 308.00 704.50 828.50 1370.50 8195.00
1933 1195.50 1291.50 915.00 677.50 499.00 125.00 34.50 100.00 383.00 602.50 833.50 1044.50 7701.50
1934 978.00 903.00 779.50 407.00 273.00 189.00 36.50 34.50 421.50 581.50 780.00 1168.00 6551.50
1935 1343.50 1042.00 1026.00 804.00 438.50 230.50 81.00 111.50 227.50 683.00 1110.00 1123.50 8221.00
1936 1239.00 1708.00 1006.00 608.50 240.50 164.50 13.00 44.00 321.50 613.00 1196.50 1186.00 8340.50
1937 1981.50 1208.50 967.50 679.50 363.00 209.00 21.00 123.50 226.00 547.00 889.00 1171.00 8386.50
1938 1233.50 1164.50 950.50 586.50 421.00 132.50 31.50 75.00 126.50 586.50 1037.00 1162.50 7507.50
1939 1081.50 1224.50 932.50 554.00 321.00 320.00 58.50 50.50 267.00 576.50 890.00 1040.50 7316.50
1940 1383.00 1009.00 769.50 602.00 282.00 124.00 27.00 31.00 151.50 514.00 1191.00 1112.00 7196.00
1941 1258.00 1013.00 781.00 525.50 363.00 159.50 4.50 89.00 434.00 675.00 864.50 1130.50 7297.50
1942 1475.00 1184.00 923.00 578.00 456.50 314.50 57.00 99.50 270.50 604.00 1062.00 1139.00 8163.00
1943 1614.50 1083.00 1231.00 518.00 501.50 331.50 85.00 71.00 254.00 582.00 945.00 1217.00 8433.50
1944 1214.00 1093.00 1058.00 590.00 352.50 190.50 55.00 103.50 266.50 491.00 945.50 1286.00 7645.50
1945 1111.00 980.50 964.00 761.00 399.00 257.00 34.00 41.00 399.00 566.50 973.00 1206.00 7692.00
1946 1174.50 983.00 826.00 586.50 403.00 210.50 30.00 86.00 337.50 791.00 1125.50 1271.00 7824.50
1947 1350.00 1064.00 941.00 582.00 310.50 280.00 26.50 110.00 319.50 554.00 1013.50 1181.00 7732.00
1948 1235.00 1183.50 1129.00 689.50 385.00 125.50 116.50 101.00 308.00 679.50 958.50 1415.50 8326.50
1949 1810.00 1264.00 1055.50 541.00 296.00 227.50 91.50 67.50 298.00 774.00 804.00 1266.50 8495.50
1950 1893.00 1101.50 1073.00 721.50 493.00 236.50 77.50 61.00 320.50 629.00 1026.00 1112.00 8744.50
1951 1429.00 1041.50 1160.50 685.00 439.00 316.00 81.50 143.00 389.50 744.00 1005.00 1519.50 8953.50
1952 1434.00 1076.00 1050.50 554.00 356.00 221.00 117.00 106.50 255.50 585.50 1027.50 1164.00 7947.50
1953 944.50 918.00 870.00 721.00 466.00 274.00 72.50 97.00 256.50 600.00 851.50 1066.50 7137.50
1954 1361.50 969.50 1097.50 763.50 388.50 310.00 95.00 166.00 364.00 751.00 813.50 1144.00 8224.00
1955 1264.00 1234.50 1290.00 762.50 567.50 200.50 135.50 73.50 368.50 655.50 1268.50 1370.50 9191.00
1956 1328.50 1306.00 1061.00 645.00 334.50 239.00 64.50 110.50 327.00 661.00 1062.50 1151.50 8291.00
1957 1718.50 1215.00 1005.00 655.00 267.00 190.00 64.50 107.50 292.50 752.00 1013.00 1052.00 8332.00
1958 1146.50 1003.00 973.00 654.00 177.50 126.50 62.00 32.00 336.00 664.00 1025.00 1180.50 7380.00
1959 1311.50 1188.00 952.50 645.50 544.00 190.50 97.50 173.50 372.50 699.50 1289.00 1266.50 8730.50
1960 1572.50 1327.50 1170.50 661.00 461.00 219.00 15.00 154.00 314.00 670.00 1012.00 1348.00 8924.50
1961 1274.50 828.00 879.50 736.50 401.00 73.50 12.00 16.50 476.50 775.50 1154.50 1372.50 8000.50
1962 1490.50 1102.00 1094.00 577.50 444.50 229.00 125.00 126.50 334.00 682.50 866.00 1047.00 8118.50
1963 1692.00 935.00 862.50 654.00 459.00 206.00 110.50 76.00 193.50 597.50 931.00 1334.00 8051.00
1964 1254.50 1191.50 1149.00 731.50 475.50 246.00 74.50 208.50 447.50 706.00 1021.00 1457.50 8963.00
1965 1212.00 1143.50 1256.00 646.50 524.00 275.50 65.00 120.00 597.50 611.50 923.50 1207.50 8582.50
1966 1260.50 1151.50 1008.00 698.50 377.50 307.00 73.00 132.50 171.50 740.00 1030.50 1170.50 8121.00
1967 1123.50 971.50 1064.50 774.00 457.00 197.50 35.50 23.50 184.00 636.00 981.00 1279.00 7727.00
1968 1384.00 959.50 803.50 743.50 471.50 217.00 84.50 138.00 360.50 745.00 1007.50 1464.50 8379.00
1969 1664.00 1254.00 1179.50 563.00 346.50 218.00 116.50 108.50 295.50 781.00 955.50 1204.50 8686.50
1970 1424.00 1060.00 1068.00 749.50 400.00 132.50 51.00 68.00 484.50 804.00 1033.00 1284.50 8559.00
1971 1342.50 1015.00 994.50 642.00 351.00 312.50 121.50 31.50 477.00 776.50 957.00 1447.00 8468.00
1972 1584.00 1124.00 825.00 750.50 385.00 187.00 115.50 27.50 419.00 797.50 967.00 1447.50 8629.50
1973 1414.50 1063.50 798.50 675.50 392.00 210.00 49.00 75.50 320.50 658.00 1082.50 1115.00 7854.50
1974 1389.50 934.00 972.00 605.50 518.50 129.00 56.00 97.50 335.50 688.50 920.50 1117.50 7764.00
1975 1450.50 1282.50 1148.00 784.50 465.50 265.50 17.00 138.00 314.50 663.00 1047.50 1168.00 8744.50
1976 1269.50 1045.00 1034.50 605.00 360.00 277.00 67.00 109.00 251.50 731.00 1011.50 1171.00 7932.00
1977 1413.50 955.50 940.00 560.00 452.00 121.50 91.50 102.00 384.00 713.50 1088.00 1413.00 8234.50
1978 1405.50 1106.50 942.50 631.50 503.50 174.00 64.00 145.00 336.50 692.50 1174.50 1577.00 8753.00
1979 2022.00 1174.00 971.50 668.50 412.50 158.00 51.00 19.00 196.50 603.00 1080.00 1018.00 8374.00
1980 1639.50 1090.00 998.00 510.00 305.00 224.00 77.00 186.00 286.00 655.00 954.00 1131.00 8055.50
1981 1094.00 966.50 813.50 601.00 385.50 337.50 90.00 39.50 294.00 769.00 972.00 1349.50 7712.00
1982 1489.00 1229.00 909.00 805.00 502.50 158.00 139.00 92.50 351.00 748.50 1095.50 1284.00 8803.00
1983 1096.50 900.50 839.00 682.00 423.50 235.50 135.00 36.00 438.00 688.00 934.00 1770.00 8178.00
1984 1217.50 965.00 842.00 665.00 509.50 259.50 61.50 54.00 439.50 822.50 989.00 1512.00 8337.00
1985 1468.50 1390.00 1147.50 610.50 338.50 246.00 6.00 184.00 514.50 763.00 1445.50 1451.00 9565.00
1986 1247.00 1153.50 766.50 643.00 382.00 69.00 157.50 14.00 414.00 671.00 1068.00 1243.50 7829.00
1987 1368.50 1029.00 897.50 492.00 318.00 128.00 109.00 150.00 258.00 679.00 891.00 1304.50 7624.50
1988 1411.50 1001.50 841.00 523.00 413.50 128.00 72.50 75.00 344.00 512.50 886.50 1271.50 7480.50
1989 1190.50 1434.00 1052.50 611.00 444.00 146.50 37.50 145.00 351.50 691.00 878.50 1185.50 8167.50
1990 1103.00 1095.00 886.00 597.00 463.50 243.50 40.50 64.00 164.00 740.50 898.00 1532.50 7827.50
1991 1507.50 889.00 993.00 672.50 454.50 309.50 74.50 50.00 307.00 780.00 1061.00 1103.50 8202.00
1992 1133.50 891.50 744.50 581.50 334.00 119.50 110.50 154.50 396.50 601.50 965.00 1453.00 7485.50
1993 1539.00 1282.50 917.00 624.00 241.00 245.00 241.00 154.50 379.00 644.00 1175.00 1160.00 8602.00
1994 1025.00 1236.00 872.50 588.00 385.50 265.00 50.00 59.50 281.50 736.00 1084.00 1245.00 7828.00
1995 1288.00 933.00 983.73 a 696.50 405.00 260.00 96.50 214.00 323.00 768.50 952.00 1217.50 8137.73
1996 1503.00 1180.00 1104.00 649.50 560.00 205.00 76.00 104.50 406.50 736.50 1144.00 1437.50 9106.50
1997 1437.50 1092.50 1046.50 798.50 391.50 230.00 100.50 81.00 288.00 677.00 999.50 1187.50 8330.00
1998 1246.50 912.00 930.50 598.00 322.50 246.50 19.00 64.00 199.00 727.00 860.50 1217.00 7342.50
1999 1107.50 920.00 856.50 687.00 509.00 283.50 139.50 64.00 408.00 700.50 845.69 a 1088.00 7609.19
2000 1265.00 1099.00 862.50 634.00 450.50 241.50 93.00 108.50 397.50 712.00 1145.50 1417.00 8426.00
2001 1284.00 1271.00 941.00 707.50 382.00 294.50 116.00 63.50 202.00 737.00 893.00 1228.00 8119.50
2002 1198.50 1115.50 1233.00 681.50 526.00 225.00 47.00 126.50 310.00 871.50 960.00 1096.50 8391.00
2003 1161.00 1028.50 935.00 616.50 435.00 171.50 35.50 26.00 268.00 632.00 1148.50 1348.50 7806.00
2004 1367.00 1090.50 839.50 593.50 445.00 222.00 53.00 78.00 373.50 686.50 964.00 1113.50 7826.00
2005 1357.50 956.00 883.50 664.50 408.50 286.00 63.00 136.00 372.00 686.00 997.00 1463.00 8273.00
2006 1019.90 a 1140.00 908.50 618.00 379.00 154.66 a 7.50 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4220.06
Period of Record Statistics
MEAN 1350.93 1110.48 969.88 643.46 413.14 217.82 73.56 100.39 334.84 672.50 992.90 1258.77 8142.01
S.D. 212.63 148.29 123.57 83.13 78.68 66.20 43.68 52.84 88.14 84.15 116.99 150.09 509.68
SKEW 0.92 0.67 0.39 -0.14 -0.30 -0.01 0.88 0.50 0.23 0.07 0.73 0.72 0.00
MAX 2022.00 1708.00 1290.00 805.00 567.50 409.00 241.00 276.00 597.50 886.00 1445.50 1770.00 9565.00
MIN 944.50 816.50 742.50 407.00 177.50 69.00 4.00 0.00 126.50 491.00 777.50 981.50 6551.50
NO YRS 107 107 107 107 108 108 107 107 107 107 107 107 106