BIG SKY 2 WNW, MONTANA

Monthly Total Heating Degree Days

(240775)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1984 0.00 z 0.00 z 1125.00 957.50 649.45 a 487.50 174.50 214.00 564.00 935.54 c 1116.67 c 1529.50 7753.65
1985 1527.27 a 1425.93 a 1263.50 792.41 a 563.17 a 350.50 110.50 311.00 0.00 z 824.17 b 1394.50 1514.87 a 10077.81
1986 1279.00 1101.50 914.00 840.00 625.50 274.00 311.00 175.00 591.00 758.00 1184.00 1422.00 9475.00
1987 1463.50 1167.50 1078.50 692.50 523.50 326.50 253.00 297.50 399.50 682.00 1035.00 1442.00 9361.00
1988 1499.50 1185.00 1197.00 773.50 509.50 167.50 90.00 172.00 444.00 583.00 1146.50 1483.00 9250.50
1989 1468.50 1472.50 1079.50 825.50 635.50 365.00 0.00 z 0.00 z 0.00 z 803.50 1029.00 1408.00 9087.00
1990 1324.50 1259.00 1094.50 777.00 701.50 400.50 187.50 181.50 286.00 801.50 1030.50 1777.50 9821.50
1991 1497.00 993.00 1181.50 940.50 705.50 356.00 116.00 133.00 363.50 793.00 1259.00 1341.00 9679.00
1992 1347.00 0.00 z 0.00 z 766.50 484.00 320.00 227.50 234.00 478.50 631.76 b 1260.50 1526.00 7275.76
1993 1581.00 1365.00 1064.00 908.00 482.00 475.50 464.50 363.00 514.50 956.50 1533.00 0.00 z 9707.00
1994 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
1995 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
1996 0.00 z 0.00 z 0.00 z 880.50 377.00 o 67.50 u 91.00 m 174.50 491.50 824.00 1101.21 a 1415.67 a 4887.37
1997 1473.00 1226.00 1062.00 598.00 k 360.50 l 311.00 211.50 197.00 370.50 801.00 594.50 m 1457.00 7109.00
1998 1347.50 1167.00 1123.50 548.00 j 592.50 538.00 70.00 j 138.00 286.50 772.00 720.00 j 1466.00 7431.00
1999 1339.09 c 1149.17 d 827.00 h 731.50 g 345.50 n 413.40 e 148.00 h 166.22 b 482.40 e 395.50 l 909.00 e 1422.79 b 5882.07
2000 1378.39 c 1095.62 d 1110.66 b 783.46 d 433.50 i 380.19 d 144.84 b 137.29 c 476.25 b 777.77 c 1447.78 c 1464.46 d 9196.71
2001 1430.28 b 1286.44 a 1051.42 a 871.20 e 586.62 e 388.89 c 173.94 d 121.93 a 284.00 f 654.50 f 998.08 d 1511.54 d 8420.33
2002 1442.50 1279.00 1293.00 906.50 692.00 368.00 106.00 314.50 450.00 951.50 1160.50 1345.00 10308.50
2003 1277.50 1302.58 d 1082.50 543.50 j 475.00 h 396.00 49.50 g 100.50 f 443.50 711.00 1300.50 1350.00 7863.58
2004 1450.00 0.00 z 935.50 769.00 0.00 z 426.50 196.50 297.00 460.00 777.50 1137.00 1309.00 7758.00
2005 1355.50 1144.00 1090.50 851.50 0.00 z 457.00 156.50 255.00 443.00 711.50 1172.00 1489.50 9126.00
2006 1326.50 1307.50 1209.00 792.00 590.50 303.00 83.00 249.00 471.50 674.00 h 1115.50 1441.50 8889.00
2007 1598.50 1141.00 950.00 787.50 583.00 304.50 32.50 171.00 448.00 805.50 1099.00 1544.50 9465.00
2008 1606.00 1209.00 1266.50 1014.00 699.00 452.00 164.00 211.00 501.00 797.00 1026.50 1582.00 10528.00
2009 1422.50 1176.50 1193.00 942.50 621.00 458.00 227.00 240.00 310.50 1011.50 1120.50 1664.70 a 10387.70
2010 1371.00 1225.50 1047.00 878.00 829.00 429.00 238.00 282.50 424.00 644.50 1218.75 b 1402.00 9989.25
2011 1441.50 1351.00 1147.00 1000.50 773.00 487.24 a 190.50 188.50 369.31 a 731.50 1192.00 1480.50 10352.55
2012 1357.50 1279.00 996.50 745.34 a 674.00 366.50 86.00 142.00 365.00 822.50 1040.00 1409.00 9283.34
2013 1486.50 1243.50 1168.00 27.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 60.50 z 3898.00
Period of Record Statistics
MEAN 1426.58 1231.34 1108.94 847.63 626.01 384.70 179.31 214.66 434.75 787.82 1161.08 1469.19 9825.11
S.D. 92.92 109.57 99.69 85.98 92.40 80.36 91.88 66.80 78.82 103.47 145.21 101.13 473.09
SKEW 0.28 0.19 -0.09 0.31 0.29 -0.46 1.24 0.52 -0.22 0.25 0.84 1.11 0.23
MAX 1606.00 1472.50 1293.00 1014.00 829.00 538.00 464.50 363.00 591.00 1011.50 1533.00 1777.50 10528.00
MIN 1277.50 993.00 914.00 692.50 482.00 167.50 32.50 121.93 286.00 583.00 909.00 1309.00 9250.50
NO YRS 26 24 25 23 20 26 22 25 24 24 25 26 12