SWAN VALLEY 2 E, IDAHO

Monthly Total Heating Degree Days

(108937)

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
1960 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 10.00 g 152.00 261.00 665.50 971.00 1404.00 3453.50
1961 1517.00 1013.00 1002.00 775.50 466.00 161.50 51.00 43.00 493.00 738.50 1101.50 1391.38 a 8753.38
1962 1582.50 1126.00 1187.00 645.00 456.50 242.00 133.50 158.50 304.50 534.50 922.50 1204.00 8496.50
1963 1586.00 908.50 1088.50 825.00 447.00 322.50 118.50 91.50 190.50 467.50 919.50 1377.50 8342.50
1964 1585.00 1523.00 0.00 z 0.00 z 0.00 z 0.00 z 18.94 d 175.00 404.00 596.50 957.00 1204.50 6463.94
1965 1213.00 1133.00 1192.00 618.00 519.00 270.00 67.00 152.00 346.00 i 0.00 z 0.00 z 0.00 z 5164.00
1966 0.00 z 0.00 z 434.50 q 735.00 350.50 230.50 17.50 84.00 196.50 715.50 905.50 1369.00 4604.00
1967 1209.00 1109.00 930.00 763.00 479.00 250.50 14.50 17.00 204.50 612.50 906.00 1491.50 7986.50
1968 1446.50 1103.00 907.00 805.50 529.50 232.50 36.50 179.50 340.00 630.00 1016.00 1288.00 8514.00
1969 1168.00 1105.00 1151.50 616.00 354.00 282.00 55.50 45.50 206.50 802.00 996.00 1275.50 8057.50
1970 1317.00 1078.00 1077.00 905.00 477.00 240.00 71.50 55.50 448.00 799.00 939.00 1350.00 8757.00
1971 1306.50 1194.00 1101.50 699.00 466.50 280.00 91.00 26.50 443.00 728.50 1012.50 1444.50 8793.50
1972 1367.50 1114.00 836.50 748.00 503.50 194.00 110.00 81.50 405.00 661.00 1005.00 1502.00 8528.00
1973 1491.00 1208.00 1101.00 835.50 470.50 241.00 66.00 93.00 364.00 609.50 1017.50 1258.00 8755.00
1974 1407.50 1269.50 975.00 730.00 539.00 176.00 21.00 140.00 352.00 629.50 963.00 1461.00 8663.50
1975 1496.00 1268.50 1080.00 960.00 633.50 349.00 38.00 178.00 355.00 654.00 1141.07 b 1161.50 9314.57
1976 1369.50 1237.50 1310.00 779.00 404.00 305.00 38.00 147.50 278.50 724.00 960.00 1336.00 8889.00
1977 1608.50 1258.50 1184.00 654.50 549.50 140.50 83.50 123.50 324.50 631.00 996.50 1263.00 8817.50
1978 1275.50 1110.50 926.50 692.50 548.00 285.00 91.00 158.50 355.00 651.50 1094.00 1622.00 8810.00
1979 1790.50 1138.00 1109.00 815.00 c 507.50 277.50 77.50 124.50 254.00 619.50 1173.00 1129.00 9015.00
1980 1363.00 1006.00 993.00 603.50 505.50 269.00 71.00 166.00 290.00 679.00 913.50 1111.35 a 7970.85
1981 1179.50 1035.00 887.50 624.00 507.00 265.00 92.50 34.62 a 251.38 a 703.00 884.50 1183.50 7647.50
1982 1413.00 1246.50 970.00 820.50 525.00 248.50 114.00 37.00 330.50 738.00 1052.50 1311.50 8807.00
1983 1181.50 1064.00 937.00 831.00 547.00 281.00 90.50 22.50 275.50 564.00 968.50 1445.50 8208.00
1984 1469.50 1276.00 1016.50 792.50 416.50 257.50 47.00 40.50 364.50 801.50 949.00 1433.50 8864.50
1985 1611.00 1358.50 1167.00 626.50 402.50 198.00 22.50 143.50 516.00 751.00 1216.00 1525.50 9538.00
1986 1277.00 964.00 773.00 714.50 468.62 a 95.00 122.00 62.50 488.00 677.50 1028.50 1352.50 8023.12
1987 1463.41 b 1064.00 970.00 533.00 351.50 178.50 85.00 161.50 284.00 617.50 995.00 1317.50 8020.91
1988 1533.00 1212.50 1073.00 602.00 426.50 103.50 42.50 64.00 276.00 426.00 1019.50 1369.00 8147.50
1989 1451.00 1256.50 900.00 598.50 419.50 186.50 9.50 95.00 280.00 670.50 988.50 1428.00 8283.50
1990 1280.00 1196.50 975.00 641.50 484.00 181.50 15.00 34.00 112.00 651.50 955.50 1636.50 8163.00
1991 1510.00 1001.50 953.50 784.00 605.50 269.50 36.00 9.00 256.00 667.50 1099.00 1383.00 8574.50
1992 1410.50 966.50 781.50 517.50 286.50 159.00 108.50 89.50 338.00 541.50 1177.00 1453.50 7829.50
1993 1455.00 1283.00 1031.00 766.00 412.00 335.50 310.50 178.50 364.50 687.50 1166.00 1356.50 9346.00
1994 1236.50 1157.00 885.00 651.00 383.50 176.50 62.50 25.50 214.00 678.00 1255.86 a 1275.50 8000.86
1995 1287.50 923.00 974.00 738.00 560.00 282.00 98.50 71.50 295.00 683.50 842.50 1182.50 7938.00
1996 1340.75 a 1173.00 976.50 723.50 531.00 155.00 45.00 68.00 351.50 664.50 905.00 1213.00 8146.75
1997 1351.50 1221.50 967.00 764.00 411.00 190.00 94.00 49.50 209.00 683.50 467.00 o 1423.50 7364.50
1998 1174.50 1080.00 1073.00 672.50 440.00 393.00 9.00 34.50 146.50 645.50 904.00 758.00 m 6572.50
1999 1232.00 1070.50 973.00 734.50 553.50 244.50 83.50 38.00 360.50 550.50 757.50 1085.50 g 6598.00
2000 1280.00 1019.50 972.50 561.00 419.00 187.00 14.50 i 26.50 293.50 401.00 j 1230.00 1399.00 7388.00
2001 1560.00 1136.50 718.00 i 616.00 325.50 199.50 10.50 6.00 k 179.50 575.00 843.50 1429.00 6875.00
2002 1373.50 1279.50 1208.00 435.00 k 457.00 179.50 16.00 104.50 307.50 345.00 p 1114.00 1179.50 7219.00
2003 1149.50 1139.00 875.00 541.00 f 380.00 145.00 7.00 24.00 257.00 501.50 554.50 n 1169.00 5647.00
2004 1366.00 1242.00 830.00 592.50 453.50 207.50 37.50 97.50 254.50 595.50 958.00 812.50 j 6634.50
2005 903.00 g 1114.50 974.50 617.50 442.50 261.50 31.50 76.50 285.00 548.00 963.60 e 1296.26 d 6611.36
2006 1230.00 1259.50 1016.50 568.00 387.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4461.00
Period of Record Statistics
MEAN 1384.45 1147.62 1007.24 704.53 462.26 230.19 65.04 88.46 305.76 645.85 1004.27 1343.02 8484.94
S.D. 148.90 121.64 119.26 101.87 74.78 64.35 52.40 54.31 90.24 83.87 110.76 126.89 469.78
SKEW 0.39 0.37 0.29 0.26 -0.06 0.13 2.33 0.32 0.31 -0.37 0.45 0.16 0.31
MAX 1790.50 1523.00 1310.00 960.00 633.50 393.00 310.50 179.50 516.00 802.00 1255.86 1636.50 9538.00
MIN 1149.50 908.50 773.00 517.50 286.50 95.00 7.00 9.00 112.00 426.00 757.50 1111.35 7647.50
NO YRS 44 45 43 43 45 44 44 45 45 43 43 42 33