DIVIDE 2 NW, MONTANA

Monthly Total Heating Degree Days

(242421)

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
1915 0.00 z 38.50 z 0.00 z 21.50 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
1916 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 13.50 z 0.00 z 0.00 z 0.00
1917 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
1918 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
1919 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
1920 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
1921 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
1922 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
1923 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
1924 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
1925 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
1926 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
1927 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
1928 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
1929 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
1930 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
1931 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
1932 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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
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 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
1941 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
1942 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
1943 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
1944 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
1945 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
1946 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
1947 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
1948 0.00 z 0.00 z 0.00 z 883.85 d 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1114.82 b 1654.50 3653.17
1949 1927.00 1313.50 1177.50 596.00 403.50 289.66 a 86.00 81.00 320.50 846.50 741.21 a 1355.00 9137.36
1950 1604.00 1048.50 1128.00 790.00 625.50 331.50 144.00 121.00 434.00 587.00 1045.00 1162.50 9021.00
1951 1534.00 1140.50 1279.50 758.00 505.00 442.50 113.50 184.00 412.00 766.00 1098.00 1472.50 9705.50
1952 1492.00 1301.50 1299.50 652.50 489.00 257.50 134.00 120.50 246.00 528.00 1181.50 1343.00 9045.00
1953 1015.50 1090.00 991.00 857.00 642.00 321.00 51.00 98.00 i 252.50 559.50 886.00 1185.50 7851.00
1954 1358.50 958.50 1191.50 701.79 b 519.50 427.50 63.00 184.00 353.00 723.16 b 795.00 a 1408.00 8683.44
1955 1488.52 a 1335.38 b 1334.60 b 885.00 b 591.50 321.21 a 169.47 a 45.47 a 384.50 642.50 1278.62 a 1471.50 9948.27
1956 1472.00 1348.50 a 1123.00 744.00 451.00 237.00 122.00 169.98 a 354.83 a 693.76 b 1076.50 1185.20 c 8977.77
1957 1722.71 c 1172.37 a 1082.86 b 813.50 434.00 a 252.93 a 64.67 b 103.50 347.07 a 750.20 a 1088.79 a 1178.00 9010.61
1958 1357.00 955.50 1170.00 818.00 297.00 288.50 157.50 59.00 388.00 594.50 1057.50 1127.00 8269.50
1959 1298.00 1306.50 1073.50 742.00 660.00 222.00 104.00 147.00 447.50 703.00 1145.50 1242.00 9091.00
1960 1531.00 1351.00 1098.50 768.00 587.00 255.50 39.00 209.50 328.50 668.50 1024.50 1335.00 9196.00
1961 1241.00 896.50 1003.00 827.00 509.00 108.50 26.50 38.00 577.00 749.00 1088.50 1404.00 8468.00
1962 1581.00 1181.50 1167.50 656.50 558.00 285.00 144.00 192.00 365.50 586.50 1004.50 1170.50 8892.50
1963 1655.50 868.50 1000.50 820.50 472.00 337.50 125.50 107.50 214.50 542.00 990.00 1369.50 8503.50
1964 1386.00 1175.50 1196.50 815.50 543.00 346.50 40.00 207.00 440.50 607.50 1061.50 1364.50 9184.00
1965 1242.50 1048.50 1309.00 712.50 614.50 310.00 104.50 178.00 657.50 541.00 911.00 1278.00 8907.00
1966 1309.50 1160.50 1041.50 784.50 396.50 322.24 a 38.00 140.50 227.00 678.50 961.00 1310.50 8370.24
1967 1222.50 1014.00 1119.50 910.00 564.50 295.50 38.00 53.00 215.50 681.00 1004.00 1480.00 8597.50
1968 1463.00 1096.50 910.50 858.50 626.00 320.50 73.00 223.00 414.50 705.00 1074.50 1458.00 9223.00
1969 1475.00 1304.00 1230.00 668.50 416.00 343.50 107.50 78.00 314.00 884.50 952.00 1294.00 9067.00
1970 1326.00 961.00 1150.50 945.50 496.00 233.00 60.50 45.00 483.50 783.50 1031.00 1379.00 8894.50
1971 1275.50 1055.50 1118.00 781.00 487.50 330.00 116.50 25.00 500.50 779.00 1000.00 1484.00 8952.50
1972 1427.00 1116.50 881.00 817.50 532.00 214.50 150.50 82.00 490.50 751.50 1079.50 1556.00 9098.50
1973 1528.00 0.00 z 1061.50 864.00 522.00 290.50 64.50 93.00 407.50 682.50 1107.50 1226.50 7847.50
1974 1450.50 1053.00 1081.00 725.00 651.00 154.00 54.50 183.00 346.00 611.50 993.50 1301.50 8604.50
1975 1397.50 1323.50 1188.50 1015.00 648.00 378.50 60.00 226.00 363.00 777.50 1124.50 1208.00 9710.00
1976 1237.00 1128.50 1199.50 780.00 447.50 366.00 76.50 192.00 352.00 693.50 987.50 1201.00 8661.00
1977 1432.00 958.00 1170.00 662.50 615.50 179.00 158.00 187.50 413.00 686.50 1093.00 1293.50 8848.50
1978 1304.50 1118.00 920.00 735.00 615.50 298.50 145.00 186.50 394.50 622.50 1238.00 1655.00 9233.00
1979 1905.00 1199.50 1025.50 810.50 515.00 237.50 79.50 116.00 243.50 618.50 1200.50 1159.00 9110.00
1980 1560.50 1132.50 1109.00 649.50 493.00 320.50 104.00 236.50 364.50 681.50 1016.50 1035.50 8703.50
1981 1147.50 1053.00 927.50 706.00 551.50 340.50 111.50 51.50 327.50 771.50 978.00 1311.00 8277.00
1982 1439.50 1253.50 1040.00 897.50 612.00 292.50 130.00 78.50 443.00 765.50 1217.50 1427.00 9596.50
1983 1259.00 1074.00 978.50 844.00 553.50 314.00 163.00 76.00 454.50 643.00 1036.00 1750.50 9146.00
1984 1247.00 1059.00 983.00 828.00 520.00 353.50 65.50 59.50 495.00 836.50 1095.50 1546.50 9089.00
1985 1541.00 1298.50 1144.00 644.50 434.50 218.50 24.00 189.00 531.50 751.50 1410.00 1389.50 9576.50
1986 1212.00 1042.50 798.00 739.00 496.50 111.00 174.50 72.00 545.50 658.50 1061.00 1372.50 8283.00
1987 1377.00 1060.00 958.00 556.50 395.00 189.50 166.00 206.50 253.50 614.00 1000.50 1385.50 8162.00
1988 1480.00 1041.50 1009.00 653.00 450.00 131.50 48.50 89.50 380.50 491.50 1056.00 1364.00 8195.00
1989 1330.50 1496.00 1065.50 701.00 545.50 222.50 30.50 180.50 365.00 713.50 894.00 1260.00 8804.50
1990 1192.00 1089.00 998.50 647.50 583.00 298.00 76.00 128.00 175.00 712.50 931.50 1652.00 8483.00
1991 1353.50 870.50 1054.00 802.00 575.00 316.50 39.50 26.00 292.50 712.00 1138.50 1327.32 a 8507.32
1992 1299.00 1003.50 773.00 616.50 352.00 195.50 183.50 153.50 343.00 611.50 1105.50 1526.00 8162.50
1993 1562.00 1418.50 906.50 761.00 377.00 350.00 332.50 256.50 385.50 658.00 1180.50 1234.00 9422.00
1994 1075.00 1200.50 891.00 672.50 401.50 235.00 95.50 51.00 222.50 747.00 1178.00 1316.50 8086.00
1995 1419.00 0.00 z 0.00 z 437.50 o 602.00 332.50 143.00 171.50 376.50 847.00 894.50 1265.00 6051.00
1996 863.00 m 1205.00 1215.50 763.45 a 636.50 255.50 88.00 143.50 480.00 796.50 1090.50 1368.00 8042.45
1997 1411.50 1159.50 1007.00 940.00 455.50 279.00 104.00 i 129.50 342.00 736.77 a 1055.00 909.00 k 7515.77
1998 1381.10 b 1191.50 1096.50 761.50 472.00 402.50 l 21.00 h 52.00 j 170.50 j 778.10 a 708.50 i 864.00 j 5680.70
1999 770.50 k 637.50 l 609.00 l 638.00 h 452.00 g 259.50 j 146.50 h 67.50 l 455.40 e 491.00 g 642.00 g 682.50 n 455.40
2000 1031.00 h 827.50 f 748.50 g 524.00 g 272.50 o 166.00 l 55.50 i 60.21 e 236.50 l 550.50 h 809.50 l 1022.50 i 60.21
2001 1007.00 i 0.00 z 733.50 g 491.00 l 288.50 n 192.00 h 92.50 o 15.50 m 94.50 q 388.00 m 604.00 k 582.50 s 0.00
2002 725.00 n 1251.00 872.00 k 586.00 i 646.00 252.50 26.00 g 210.50 236.50 h 886.00 568.50 n 864.00 j 3246.00
2003 1216.50 822.00 j 777.00 g 738.50 548.46 e 215.50 f 27.42 e 21.00 f 356.40 e 615.50 1240.00 1320.50 6063.28
2004 1462.50 1220.50 840.50 699.00 567.00 309.00 85.50 150.50 418.00 689.00 1027.00 1205.50 8674.00
2005 1352.50 1035.00 959.50 767.50 546.50 378.50 90.50 137.00 396.00 635.50 1100.00 1424.45 a 8822.95
2006 0.00 z 1223.50 1048.50 723.50 482.50 201.21 a 19.50 r 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3679.21
Period of Record Statistics
MEAN 1403.42 1141.52 1067.81 765.02 522.38 281.03 99.80 131.45 379.09 692.53 1059.26 1349.87 8878.29
S.D. 177.17 141.74 129.12 95.05 86.15 72.86 56.36 63.34 98.30 90.99 117.16 148.43 449.59
SKEW 0.66 0.21 -0.11 0.22 -0.37 -0.38 1.36 0.01 0.23 0.04 0.06 0.54 0.20
MAX 1927.00 1496.00 1334.60 1015.00 660.00 442.50 332.50 256.50 657.50 886.00 1410.00 1750.50 9948.27
MIN 1015.50 868.50 773.00 556.50 297.00 108.50 24.00 25.00 175.00 491.50 741.21 1035.50 8086.00
NO YRS 52 52 52 54 55 53 51 52 53 54 53 52 46