POLEBRIDGE, MONTANA

Monthly Total Heating Degree Days

(246615)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1933 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 76.00 n 149.00 328.00 j 465.50 n 577.00 k 894.00 i 149.00
1934 750.00 j 631.50 l 591.00 k 458.50 f 192.00 l 352.22 c 142.50 148.00 512.88 d 735.39 d 565.50 j 1296.04 e 3187.03
1935 1410.50 d 558.00 o 0.00 z 459.00 n 431.00 l 387.50 0.00 z 193.00 j 423.00 830.50 1220.00 1273.58 a 5545.08
1936 1032.00 h 1475.50 g 1141.63 e 647.50 f 360.00 228.50 57.50 133.50 464.00 709.50 863.00 h 1301.47 b 4396.10
1937 2106.93 b 1303.83 e 450.00 r 741.50 465.50 293.50 60.97 a 191.50 327.00 629.00 963.62 a 1363.40 e 8446.75
1938 1412.50 1224.42 d 1034.62 c 783.00 e 571.43 a 256.20 e 98.00 246.50 167.50 j 0.00 z 371.00 t 853.00 j 5626.68
1939 668.00 m 874.00 k 283.50 v 129.00 y 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 439.50 q 1269.45 a 1269.45
1946 1225.50 1062.00 548.50 k 352.50 p 278.50 n 300.50 120.50 185.00 437.00 427.50 o 1223.00 871.00 l 4553.50
1947 1447.50 709.50 k 1049.50 371.50 p 419.50 341.00 90.50 200.00 423.00 649.50 1123.00 1200.06 e 6943.56
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 229.06 d 209.85 e 385.50 f 766.00 1089.00 1630.50 3924.40
1949 1975.00 1378.50 1135.12 a 674.00 456.14 c 348.46 d 177.70 c 177.00 426.00 847.00 888.10 a 1429.00 9912.02
1950 1985.50 1131.41 a 1166.00 844.50 597.00 356.25 b 157.00 191.00 439.50 719.50 1143.10 a 1157.00 9887.76
1951 1549.00 1216.96 a 1328.00 828.50 522.50 433.97 a 149.50 255.00 501.72 a 827.50 1139.00 1666.50 10418.15
1952 1528.50 1176.57 a 1166.50 696.00 506.50 330.50 180.50 211.50 342.50 693.50 1133.50 1260.50 9226.57
1953 1075.00 1079.50 1020.00 853.50 552.50 367.76 a 161.00 162.50 378.50 658.00 923.04 b 1238.00 8469.29
1954 1530.37 a 983.50 1285.00 933.00 538.00 399.50 170.50 229.00 464.48 a 820.00 874.00 1252.50 9479.85
1955 1355.00 1294.50 1370.41 b 875.50 634.50 309.50 190.98 c 219.14 b 486.11 c 687.50 1360.50 1501.50 10285.14
1956 1383.50 1359.50 1145.00 818.79 a 494.00 308.50 127.88 c 189.21 b 414.83 a 781.89 d 1151.50 1307.17 a 9481.76
1957 1877.00 1242.00 1119.00 792.00 419.50 276.00 173.17 b 260.00 399.50 860.50 1116.21 a 1201.25 a 9736.13
1958 1249.50 1035.00 1150.50 772.00 317.23 a 232.50 135.88 a 76.50 415.34 a 758.00 1161.50 1263.77 a 8567.73
1959 1407.00 1308.50 1016.80 a 767.00 639.50 280.00 160.88 b 262.43 b 422.59 a 777.58 a 1303.00 1358.66 b 9703.93
1960 1574.00 1306.07 b 1083.40 b 780.00 595.50 330.54 b 71.50 224.23 a 407.50 738.00 1066.00 1397.50 9574.24
1961 1343.00 929.00 1000.50 806.50 475.85 a 172.24 a 93.00 a 73.50 559.50 833.00 1237.00 1423.50 8946.59
1962 1581.55 c 1218.00 1175.93 a 683.57 b 561.50 337.50 b 188.58 a 242.50 453.10 a 674.50 938.79 a 1136.00 9191.54
1963 1824.00 981.12 c 996.00 728.00 542.50 b 267.41 a 202.57 b 183.33 b 291.43 b 612.77 a 1009.66 a 1405.85 a 9044.63
1964 1282.37 a 1172.00 1224.50 a 801.72 a 600.00 351.96 b 136.29 b 289.85 a 523.45 a 724.76 b 1033.45 a 1509.50 9649.85
1965 1213.13 a 1152.50 1374.16 b 0.00 z 575.05 a 306.50 143.78 b 152.23 c 676.07 b 648.93 a 1030.34 a 1255.50 a 8528.20
1966 1388.50 1139.00 1079.50 784.50 441.75 a 380.17 a 126.67 b 234.10 b 289.14 a 751.50 1087.78 c 1217.02 b 8919.63
1967 1251.37 a 1064.00 a 1188.33 a 861.96 b 569.50 316.03 a 75.50 60.50 172.50 682.60 e 0.00 z 1360.50 7602.79
1968 0.00 z 0.00 z 0.00 z 0.00 z 540.00 302.50 142.50 227.00 378.50 361.00 p 1027.50 1545.00 4163.00
1969 1695.50 1154.50 1028.00 382.50 m 482.80 d 269.00 202.50 164.50 323.00 638.50 i 270.50 t 1222.78 d 6542.57
1970 1395.52 a 1057.00 720.00 j 410.50 p 165.00 u 172.50 0.00 z 127.00 547.50 b 815.00 1109.00 1426.00 6649.52
1971 1435.50 1096.00 1147.00 776.00 479.50 378.00 217.52 a 103.16 b 544.44 c 911.52 e 1056.00 1524.50 9669.13
1972 1649.00 1166.21 a 924.50 834.00 551.50 274.62 d 225.86 c 90.86 b 520.71 b 874.41 b 1037.59 a 1532.50 9681.76
1973 1514.02 c 1158.00 768.00 f 766.03 a 521.00 303.75 b 135.76 b 82.50 i 454.20 e 553.50 h 1175.00 1216.75 e 7244.51
1974 1484.90 a 1030.00 1095.50 707.00 617.42 a 226.20 e 0.00 z 159.50 h 335.50 h 0.00 z 1040.00 c 1241.00 7442.02
1975 1464.75 a 1356.44 a 1261.46 e 1001.00 629.50 373.00 49.00 o 290.22 b 446.50 801.50 1117.50 1285.50 10027.38
1976 1343.50 1126.00 1234.00 767.50 494.50 442.50 191.00 211.50 387.00 832.00 1081.50 1255.00 9366.00
1977 1513.50 1030.50 1053.00 711.00 595.50 256.50 220.10 a 252.50 508.00 816.00 1153.00 1518.00 9627.60
1978 1491.50 1138.50 1038.50 759.50 628.00 299.50 173.50 294.50 413.00 753.50 1246.00 1623.00 9859.00
1979 2054.50 1259.00 1048.50 789.00 558.52 a 316.20 e 185.50 150.50 0.00 z 745.50 1196.50 1116.50 9420.22
1980 0.00 z 1114.89 b 905.00 f 691.00 443.50 350.00 200.50 338.50 464.00 764.00 1051.50 1317.50 6735.39
1981 1326.50 1119.50 983.50 729.50 486.50 428.00 221.00 143.50 459.00 840.00 1009.00 1378.43 b 9124.43
1982 1504.50 1309.50 1078.50 951.50 618.00 264.50 234.50 227.00 500.50 772.00 1163.00 1439.50 10063.00
1983 1251.00 981.00 970.50 787.00 556.50 339.00 265.00 136.00 556.00 783.50 967.50 1865.00 9458.00
1984 1311.50 1061.50 953.00 765.00 632.50 366.00 174.50 166.50 593.50 907.00 1122.50 1602.50 9656.00
1985 1537.00 1401.50 1193.50 734.50 473.00 358.00 76.00 276.00 616.00 866.50 1589.00 1491.50 10612.50
1986 1286.50 1239.00 873.00 737.00 505.00 184.50 285.00 135.50 575.00 737.00 1223.00 1380.50 9161.00
1987 1473.00 1139.50 1030.00 636.72 a 452.50 256.00 194.50 319.00 408.00 790.50 1010.50 1418.00 9128.22
1988 1523.00 1187.50 984.00 676.50 546.00 236.50 187.00 204.50 409.50 625.50 1009.50 1431.00 9020.50
1989 1418.50 1564.50 1191.50 751.00 534.50 268.50 100.50 210.00 463.00 805.00 988.00 1332.00 9627.00
1990 1311.50 1285.00 1075.50 719.00 557.50 348.50 161.50 128.50 314.50 794.50 977.00 1704.50 9377.50
1991 1579.50 1007.00 1178.00 749.00 544.00 348.00 0.00 z 0.00 z 422.50 920.00 1143.50 1370.50 9262.00
1992 1295.00 1045.50 858.00 680.50 469.50 197.00 0.00 z 0.00 z 524.50 687.00 1052.50 1707.00 8516.50
1993 1733.50 1399.00 1092.00 696.00 379.50 347.50 339.50 287.50 483.00 705.50 1346.00 1243.00 10052.00
1994 1201.50 1374.50 1047.00 0.00 z 456.50 335.00 111.50 146.00 382.50 767.00 1283.00 1360.00 8464.50
1995 1427.00 1047.00 1057.00 763.50 561.50 336.50 145.50 310.50 385.00 786.50 997.00 1367.00 9184.00
1996 1582.50 1313.00 1209.50 735.00 644.50 295.50 125.00 160.00 490.00 806.50 1268.00 1595.00 10224.50
1997 1565.00 1149.00 1097.50 930.50 517.50 328.50 215.00 209.50 394.00 734.00 1085.00 1351.00 9576.50
1998 1385.50 1032.50 1099.00 727.50 473.00 365.00 70.00 112.00 281.50 842.00 952.50 1371.00 8711.50
1999 1350.00 1125.00 1082.00 903.50 697.50 403.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5561.00
2000 0.00 z 0.00 z 1051.00 807.00 617.50 373.50 119.50 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2849.00
2001 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
2002 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
2003 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
2004 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
2005 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
2006 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
2007 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
2008 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
2009 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
2010 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
2011 1413.50 1332.43 e 1073.00 920.00 653.00 438.50 256.02 b 184.45 a 392.00 762.00 1152.00 1287.00 9863.90
2012 1298.90 a 1233.50 1023.00 a 712.78 c 636.50 373.85 d 145.81 d 204.17 b 419.50 820.43 b 745.50 g 711.00 l 6868.44
2013 908.00 k 1094.43 e 1106.38 b 27.00 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 2200.81
Period of Record Statistics
MEAN 1478.45 1176.54 1099.76 779.23 533.50 318.37 163.42 195.85 441.20 768.20 1108.23 1382.66 9514.18
S.D. 217.23 133.15 110.19 79.29 79.45 63.90 59.13 64.86 90.35 74.83 130.54 157.78 493.20
SKEW 1.12 0.47 0.39 0.79 -0.36 -0.32 0.37 0.06 -0.13 -0.13 0.96 0.79 0.01
MAX 2106.93 1564.50 1374.16 1001.00 697.50 442.50 339.50 338.50 676.07 920.00 1589.00 1865.00 10612.50
MIN 1075.00 929.00 858.00 636.72 317.23 172.24 57.50 60.50 172.50 612.77 874.00 1116.50 8469.29
NO YRS 56 56 54 51 57 61 54 56 56 54 54 58 38