MALTA 35 S, MONTANA

Monthly Total Heating Degree Days

(245340)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200602
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
1959 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 228.00 p 708.57 c 1145.89 b 1063.41 c 2917.88
1960 1522.74 b 1379.57 a 1244.81 b 700.96 d 337.90 a 101.11 c 3.00 41.33 d 216.92 d 0.00 z 0.00 z 1055.50 f 5548.35
1961 1199.18 a 967.00 843.50 731.50 304.66 b 15.54 b 1.50 6.20 a 412.50 d 341.50 n 738.00 k 1602.24 d 6083.81
1962 1472.50 1382.23 b 1361.00 566.25 b 355.50 103.50 41.33 a 53.14 c 291.00 509.95 a 782.00 1199.00 8117.41
1963 1781.50 1041.50 797.50 629.00 361.00 62.00 q 11.22 b 21.18 a 96.00 412.00 942.00 1428.50 7521.41
1964 1247.50 973.50 1147.50 628.00 285.00 131.50 1.50 105.50 356.50 523.00 1152.00 1943.00 8494.50
1965 1708.62 a 1307.19 a 1527.00 690.00 389.50 131.00 10.50 71.82 a 526.50 499.10 a 1130.00 1257.00 9248.22
1966 1853.50 1443.00 971.00 787.00 272.69 d 97.50 0.00 79.50 154.00 532.50 1170.00 949.50 j 7360.69
1967 1403.50 1185.00 1200.50 822.50 402.50 158.00 8.50 0.00 z 134.46 b 586.50 1143.60 e 1488.00 b 8533.06
1968 1529.00 1213.34 a 813.50 696.00 0.00 z 138.00 30.00 61.00 247.00 578.87 e 975.50 1660.50 7942.70
1969 2180.50 1498.00 1300.50 481.50 318.00 204.00 20.84 b 17.05 a 184.00 528.00 j 838.20 e 1301.00 8343.59
1970 1707.50 1164.00 816.00 i 788.50 337.50 60.50 13.00 8.50 314.50 666.50 b 1115.50 1545.50 7721.50
1971 1718.00 1248.00 1104.00 612.12 d 339.97 a 130.00 28.93 a 2.00 298.45 a 618.00 915.00 e 1687.50 8701.96
1972 1774.48 b 1498.50 990.50 659.50 349.00 47.50 83.50 12.18 c 369.50 689.75 a 670.50 i 1616.00 8090.41
1973 1322.50 1105.50 870.50 767.00 345.28 b 124.29 b 14.39 c 10.50 234.50 g 224.50 r 1265.69 a 1026.50 f 5825.64
1974 1529.50 975.00 1030.23 a 528.33 c 546.67 e 58.00 f 5.00 111.71 b 285.50 258.50 o 933.62 a 1183.00 7128.57
1975 1373.50 1413.50 1118.21 c 876.21 a 370.97 a 141.67 c 2.30 d 68.89 d 180.50 k 599.00 1052.50 1370.31 d 8387.05
1976 1383.00 951.00 1047.50 554.50 249.00 156.50 6.50 13.36 b 154.00 g 273.00 m 1046.00 1183.50 6590.86
1977 1809.62 c 876.00 747.00 f 488.50 285.64 c 49.50 k 26.57 c 85.00 l 260.50 0.00 z 0.00 z 0.00 z 3746.84
1978 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 57.00 i 232.50 546.78 b 1263.00 1584.00 3626.28
1979 1933.22 b 1661.33 d 1066.18 c 815.36 b 328.50 n 0.00 z 13.00 q 20.50 n 127.50 h 481.61 c 585.00 n 262.50 u 5957.70
1980 1295.00 h 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 1299.33 b 1299.33
1981 1112.79 b 1090.00 822.50 531.00 272.50 162.50 14.00 7.50 172.00 415.00 i 823.50 1410.50 a 6418.79
1982 2083.20 a 1470.50 1137.50 708.50 416.00 140.00 29.00 20.00 285.50 601.50 1165.50 1282.00 9339.20
1983 1224.50 885.00 891.00 721.50 402.50 120.00 10.00 2.00 296.00 538.00 987.00 2058.00 8135.50
1984 1244.00 874.00 1032.50 595.00 350.00 122.00 7.00 14.00 404.00 754.00 1021.50 1723.08 a 8141.08
1985 1561.88 a 1351.50 978.00 478.50 213.00 146.50 4.50 75.00 438.00 642.73 a 1643.50 1417.00 8950.12
1986 1024.00 1426.50 707.12 b 633.50 337.00 21.00 13.00 13.50 346.50 448.00 1065.00 1064.50 7099.62
1987 1126.00 946.50 896.50 404.00 190.00 61.55 a 24.00 101.00 194.00 611.00 838.50 1234.66 b 6627.71
1988 1576.00 1237.50 898.00 549.00 169.00 27.00 5.00 26.00 256.50 561.00 1029.00 1313.00 7647.00
1989 1411.50 1622.50 916.50 k 594.00 313.00 110.00 0.00 34.50 229.00 559.50 975.52 a 1381.00 7230.52
1990 1201.00 1185.00 918.00 651.50 382.50 147.00 26.50 12.50 127.00 626.00 952.50 1563.00 7792.50
1991 1666.25 a 839.00 949.12 a 650.00 367.50 87.00 12.50 0.00 220.00 778.50 1180.00 1159.00 7908.87
1992 1144.00 1003.00 817.00 584.50 302.00 116.50 114.00 148.00 326.00 618.50 956.00 1544.50 7674.00
1993 1925.50 1606.89 a 918.50 576.50 297.00 213.00 139.00 103.50 376.50 630.50 1183.00 1158.00 9127.89
1994 1563.00 1581.00 781.41 b 577.00 245.00 108.50 21.00 32.00 138.50 620.50 1058.50 1238.00 7964.41
1995 1001.50 j 1061.50 1135.50 723.00 450.50 123.50 40.00 40.00 240.00 585.50 1039.00 1599.00 7037.50
1996 1846.00 1258.00 1400.50 640.00 471.50 77.50 17.00 25.50 276.00 672.00 1407.50 1669.50 9761.00
1997 1701.90 a 979.00 982.50 790.50 376.00 33.00 47.50 43.50 134.00 577.00 1018.50 1157.85 a 7841.25
1998 1554.00 882.00 1127.50 485.50 0.00 z 181.00 6.50 0.00 138.00 547.00 945.50 1360.38 a 7227.38
1999 1360.26 b 855.56 a 793.08 a 610.71 b 382.69 b 157.24 a 84.22 a 15.00 338.00 601.18 c 786.50 1031.00 7015.44
2000 1396.00 1206.50 864.50 618.10 a 245.93 a 160.00 0.50 31.52 a 253.97 a 615.00 1209.00 1641.50 8242.52
2001 1150.10 a 1441.50 932.00 625.00 240.00 129.50 3.00 9.50 149.00 636.50 774.50 1322.50 7413.10
2002 1329.50 1080.00 1609.00 736.00 472.00 124.50 3.00 65.50 216.50 847.00 886.50 1216.00 8585.50
2003 1377.50 1274.00 1127.00 502.00 355.50 137.50 2.50 20.50 292.50 416.00 1269.00 1189.00 7963.00
2004 1608.56 d 1356.50 828.50 517.50 476.00 214.50 26.50 69.50 253.00 656.00 925.00 1161.00 8092.56
2005 1622.50 1011.50 929.50 550.50 431.00 118.89 c 18.50 67.00 235.50 525.00 865.50 1452.41 d 7827.80
2006 757.50 f 1140.00 0.00 z 488.00 286.00 f 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1628.00
Period of Record Statistics
MEAN 1517.67 1198.85 1022.21 630.31 341.68 119.51 22.73 40.51 261.36 595.26 1045.76 1399.00 8148.49
S.D. 276.28 236.25 206.20 109.33 81.39 48.77 30.10 36.71 95.44 91.42 178.24 236.15 753.42
SKEW 0.31 0.22 1.00 0.23 0.14 -0.34 2.37 1.02 0.48 0.36 0.92 0.68 0.21
MAX 2180.50 1661.33 1609.00 876.21 546.67 214.50 139.00 148.00 526.50 847.00 1643.50 2058.00 9761.00
MIN 1024.00 839.00 707.12 404.00 169.00 15.54 0.00 0.00 96.00 412.00 774.50 1031.00 6627.71
NO YRS 43 45 41 45 41 40 43 41 41 38 41 42 25