FORT BENTON, MONTANA

Monthly Total Heating Degree Days

(243113)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 27.50 14.43 b 207.00 571.00 838.00 1543.50 3201.43
1949 1802.00 1478.00 1089.50 406.50 231.50 105.50 7.50 15.00 218.50 655.00 611.50 1558.00 8178.50
1950 2340.50 889.00 1109.50 688.50 389.00 167.00 35.00 26.50 287.50 475.50 1051.50 1118.00 8577.50
1951 1532.50 1194.50 1411.50 678.50 282.50 266.00 47.50 81.50 332.50 704.50 972.00 1669.00 9172.50
1952 1611.00 1079.00 1111.50 419.00 262.50 67.00 30.00 52.00 130.50 524.50 981.00 1113.50 7381.50
1953 1031.00 923.00 831.50 712.50 412.00 147.50 13.50 16.50 135.00 433.50 710.00 1051.00 6417.00
1954 1801.50 703.50 1161.50 730.00 316.00 198.50 9.50 24.50 260.50 578.50 629.50 921.00 7334.50
1955 1286.00 1183.50 1198.50 684.50 403.50 135.00 66.00 7.50 288.50 491.00 1410.00 1509.50 8663.50
1956 1529.50 1226.00 929.50 641.50 277.50 40.00 19.00 53.00 181.00 514.00 784.50 1070.00 7265.50
1957 1770.00 1240.00 917.00 589.50 201.50 68.50 3.00 45.50 183.00 686.00 841.50 877.00 7422.50
1958 940.50 1214.50 1134.50 553.50 107.47 a 108.50 65.50 4.00 205.50 494.50 945.00 1201.00 6974.47
1959 1446.50 1486.00 765.50 575.00 453.50 71.50 20.00 66.50 298.00 633.00 1061.50 961.50 7838.50
1960 1342.00 1192.00 1027.50 613.50 354.00 93.00 3.00 58.50 226.50 439.50 1012.50 1213.77 e 7575.77
1961 1073.50 813.04 a 823.00 707.00 311.00 14.50 3.00 2.50 374.00 507.00 1031.00 1392.00 7051.54
1962 1314.50 1169.00 1170.00 442.50 311.00 92.50 30.00 42.00 266.50 457.00 752.50 1018.00 7065.50
1963 1629.50 845.00 769.50 590.50 311.00 95.00 19.50 30.00 108.00 371.00 872.50 1330.00 6971.50
1964 1097.50 861.50 1090.50 615.50 312.00 126.00 4.50 93.00 352.00 469.50 1013.00 1822.00 7857.00
1965 1483.50 1095.00 1363.50 610.00 397.00 160.50 19.00 52.00 528.00 387.50 1005.00 1212.50 8313.50
1966 1722.00 1144.50 851.00 663.00 256.00 147.50 2.50 65.00 106.00 544.50 1122.00 1268.50 7892.50
1967 1219.00 890.50 1092.50 806.00 393.50 158.00 9.50 3.50 131.00 472.00 912.50 1323.50 7411.50
1968 1408.00 1004.50 720.50 657.00 411.00 158.00 40.00 81.50 261.50 565.50 906.00 1604.50 7818.00
1969 2159.50 1419.50 1213.00 462.50 291.50 169.00 35.50 30.00 200.00 793.00 825.00 1193.50 8792.00
1970 1587.50 940.50 1054.00 696.50 302.50 63.50 7.00 16.00 300.50 635.50 1061.00 1430.50 8095.00
1971 1543.00 1002.00 922.00 567.50 294.50 127.50 35.00 6.00 325.00 627.00 879.50 1550.00 7879.00
1972 1630.00 1313.50 789.00 578.50 301.50 43.50 78.50 8.50 346.00 675.00 889.50 1449.00 8102.50
1973 1142.50 1014.50 811.50 668.00 296.50 111.00 14.00 22.00 231.00 495.00 1169.50 1120.00 7095.50
1974 1419.00 869.00 892.00 492.41 a 447.50 73.00 5.00 102.50 294.00 475.50 822.00 1007.50 6899.41
1975 1240.50 1388.00 1078.00 900.00 368.50 150.00 8.50 70.50 265.00 578.00 955.00 1086.50 8088.50
1976 1168.70 a 894.00 940.00 500.50 207.00 155.17 a 8.00 24.00 169.14 a 574.50 910.50 1016.00 6567.51
1977 1453.50 721.00 855.00 471.50 288.50 42.00 28.00 102.00 261.50 524.50 1055.00 1443.00 7245.50
1978 1821.00 1453.00 988.50 546.00 344.50 81.50 28.00 54.50 227.50 490.50 1185.50 1410.00 8630.50
1979 1851.50 1378.22 a 903.00 670.86 a 358.50 90.00 20.00 11.50 136.00 487.98 b 971.00 1035.00 7913.57
1980 1536.00 1185.00 981.15 a 383.00 200.50 103.00 10.00 100.50 194.00 509.00 808.50 1281.50 7292.15
1981 1070.50 901.00 817.50 472.50 280.50 172.50 22.00 7.00 199.00 570.00 749.00 1262.00 6523.50
1982 1781.50 1267.00 1021.50 691.50 396.00 98.00 29.00 22.50 277.50 580.00 1062.50 1165.50 8392.50
1983 1100.00 825.00 831.00 635.00 334.50 95.00 39.00 2.50 301.00 509.00 889.50 1996.00 7557.50
1984 1104.00 794.00 898.00 557.00 326.50 137.50 9.50 20.50 371.50 690.00 897.00 1619.20 c 7424.70
1985 1440.00 1230.50 908.50 430.86 a 180.50 99.00 0.00 71.50 410.50 575.00 1510.00 1230.50 8086.86
1986 890.00 1313.50 601.00 580.86 a 311.50 19.00 31.00 11.00 364.00 482.50 1064.00 1034.50 6702.86
1987 1056.50 854.00 838.00 381.00 187.50 47.00 37.00 80.00 152.50 548.50 797.00 1089.50 6068.50
1988 1278.23 a 1037.00 763.00 422.00 162.00 27.50 8.50 17.50 244.50 469.00 833.50 1138.50 6401.23
1989 1166.50 1492.50 1141.50 562.00 317.50 72.50 2.00 52.00 234.50 539.00 825.50 1254.50 7660.00
1990 1049.50 1005.00 857.50 558.00 355.50 141.50 12.00 17.00 102.50 549.00 805.50 1456.00 6909.00
1991 1428.00 682.50 862.50 548.50 304.00 97.50 4.00 0.00 164.50 657.00 985.00 1035.50 6769.00
1992 924.50 902.00 712.00 467.50 210.50 72.50 66.50 111.00 230.50 499.50 885.00 1412.50 6494.00
1993 1666.50 1298.50 809.00 543.00 184.00 149.50 113.00 85.00 299.00 532.00 1037.50 1006.50 7723.50
1994 1330.50 1390.50 721.00 513.00 8.00 z 95.00 12.50 22.50 88.50 570.00 996.00 1140.50 6880.00
1995 1297.00 939.00 1018.50 668.50 352.50 122.00 31.00 38.00 233.00 608.50 951.00 1368.50 7627.50
1996 1652.82 a 1120.50 1189.00 515.69 a 443.96 c 67.50 14.50 24.50 238.00 542.00 1236.50 1449.00 8493.97
1997 1454.50 837.93 a 835.50 693.50 244.50 55.00 19.50 19.00 89.00 480.00 899.50 1032.50 6660.43
1998 1343.50 814.00 917.50 435.50 170.50 126.50 0.00 k 0.00 85.00 453.50 764.50 1181.00 6291.50
1999 1095.33 a 744.43 e 698.02 a 552.12 d 202.50 i 73.00 k 23.00 f 2.00 j 247.20 e 342.50 f 595.96 d 812.09 c 4745.15
2000 1260.67 d 1073.00 a 760.69 e 473.33 c 282.58 e 105.00 0.50 i 14.00 g 166.73 d 524.50 844.00 g 1445.93 c 6092.43
2001 1094.30 a 1255.92 d 789.98 a 506.67 c 213.56 d 77.31 d 2.50 p 0.00 c 68.00 h 333.00 i 442.00 p 1150.00 5087.73
2002 1107.50 866.50 1390.00 671.00 358.00 119.50 4.00 57.50 203.00 775.00 747.00 1042.50 7341.50
2003 1082.50 1126.50 993.00 452.50 369.50 98.00 3.50 19.00 236.00 441.00 1082.50 1074.50 6978.50
2004 1469.00 1062.00 679.00 0.00 z 429.50 190.50 24.00 76.50 278.50 647.00 840.50 1054.50 6751.00
2005 1479.00 943.50 915.00 552.00 361.50 154.00 20.50 72.50 262.00 553.00 786.50 1303.00 7402.50
2006 801.50 1040.00 1028.00 500.00 296.00 40.20 e 0.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3705.70
Period of Record Statistics
MEAN 1385.47 1069.42 948.13 573.77 306.56 107.17 23.25 39.46 237.00 547.05 932.79 1250.95 7509.83
S.D. 312.32 221.92 181.58 109.75 80.35 49.43 21.98 32.02 88.63 88.39 173.07 239.56 706.68
SKEW 0.60 0.23 0.58 0.37 -0.26 0.47 1.85 0.60 0.50 0.67 0.82 0.74 0.18
MAX 2340.50 1492.50 1411.50 900.00 453.50 266.00 113.00 111.00 528.00 793.00 1510.00 1996.00 9172.50
MIN 801.50 682.50 601.00 381.00 107.47 14.50 0.00 0.00 85.00 371.00 595.96 812.09 6068.50
NO YRS 58 58 58 57 56 57 54 56 57 56 56 58 51