ROCK SPRINGS FAA AP, WYOMING

Monthly Total Heating Degree Days

(487845)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 15.00 153.00 613.50 1218.00 1497.00 3496.50
1949 1856.00 1320.50 1009.50 584.00 420.50 197.00 6.50 26.00 226.00 823.00 729.50 1333.50 8532.00
1950 1464.50 1195.00 1123.00 763.00 609.67 a 200.00 48.50 48.50 351.00 457.50 953.00 1109.00 8322.67
1951 1463.50 1057.00 1164.50 777.00 457.25 a 320.50 38.00 61.00 274.00 709.50 1122.50 1420.00 8864.75
1952 1468.00 1323.50 1291.50 663.00 420.00 110.00 42.00 34.50 157.00 464.00 1215.00 1350.00 8538.50
1953 1085.50 1111.00 958.00 838.00 622.50 143.00 1.00 24.00 155.50 579.50 878.50 1280.00 7676.50
1954 1187.50 913.50 1142.50 600.50 377.50 221.00 7.50 45.50 190.34 a 591.50 843.00 1406.00 7526.34
1955 1483.00 1274.00 1232.50 812.00 429.00 236.50 17.00 3.00 241.50 556.00 1130.50 1189.00 8604.00
1956 1276.00 1375.50 1041.50 711.00 329.00 61.50 20.00 61.50 163.50 612.50 1087.00 1210.00 7949.00
1957 1586.50 936.00 990.50 823.45 a 521.50 204.50 8.50 45.00 289.50 641.00 1239.83 a 1244.50 8530.78
1958 1514.00 1003.00 1166.50 843.00 281.50 102.50 44.00 19.00 232.00 574.00 983.50 1086.50 7849.50
1959 1354.00 1201.00 1104.50 740.00 576.50 117.00 28.00 41.00 370.50 678.50 989.00 1218.00 8418.00
1960 1484.50 1463.50 1068.00 665.00 437.00 109.00 21.50 89.00 197.50 648.50 1077.50 1448.00 8709.00
1961 1316.00 1098.00 1055.50 781.50 421.50 100.00 17.00 32.50 533.00 785.00 1208.00 1483.50 8831.50
1962 1617.50 1124.50 1309.00 651.50 485.50 227.50 47.50 87.00 250.00 537.50 896.00 1190.00 8423.50
1963 1559.00 981.50 1092.50 866.50 390.00 214.50 9.50 33.50 174.00 459.00 956.00 1296.50 8032.50
1964 1453.00 1396.00 1333.00 868.00 504.50 293.50 0.00 z 115.00 297.50 575.50 1117.00 1377.00 9330.00
1965 1317.00 1161.00 1312.50 746.00 590.50 283.00 32.50 94.50 545.50 514.00 887.50 1326.50 8810.50
1966 1478.00 1294.50 1048.00 779.00 363.50 207.00 3.00 50.50 202.50 723.00 889.50 1314.00 8352.50
1967 1203.50 1071.00 968.00 787.50 541.50 263.00 3.00 13.50 224.50 584.00 1027.50 1563.00 8250.00
1968 1396.00 1124.50 964.50 876.00 546.50 189.50 20.50 150.00 320.00 606.50 1080.00 1399.50 8673.50
1969 1195.50 1236.00 1269.50 654.50 274.50 297.00 17.50 4.50 140.00 901.00 982.50 1243.00 8215.50
1970 1274.00 961.00 1127.00 898.50 422.50 210.00 10.00 1.00 412.50 820.50 992.00 1384.50 8513.50
1971 1204.50 1089.00 1075.00 708.50 479.50 159.50 13.00 1.00 419.50 752.50 1201.50 1520.50 8624.00
1972 1427.50 1171.50 841.00 708.50 423.00 108.00 40.50 48.50 280.00 657.00 1089.00 1515.00 8309.50
1973 1636.00 1354.00 1103.00 874.00 425.00 182.00 58.50 12.50 341.50 562.00 1048.50 1240.00 8837.00
1974 1483.50 1194.50 914.50 732.00 403.00 124.50 6.00 62.50 290.50 547.00 960.00 1335.50 8053.50
1975 1356.00 1103.50 1041.50 902.00 579.50 286.00 9.50 76.00 286.00 665.50 1068.00 1208.00 8581.50
1976 1296.50 1140.50 1087.50 713.00 396.00 216.00 6.50 54.50 232.50 674.00 958.00 1196.50 7971.50
1977 1319.00 958.00 1152.50 580.00 479.50 19.50 9.00 71.50 279.50 574.00 989.50 1160.00 7592.00
1978 1268.50 1051.00 850.00 712.50 565.50 169.00 23.50 110.50 319.00 564.50 1213.50 1626.50 8474.00
1979 1805.00 1135.08 b 1008.00 697.50 468.00 196.50 2.00 83.50 160.00 590.00 1248.50 1281.00 8675.08
1980 1475.00 1161.00 1098.50 734.50 493.50 137.00 6.00 100.50 230.00 631.50 987.00 1018.00 8072.50
1981 1168.50 1037.00 943.00 585.00 498.00 138.50 33.00 40.50 204.50 783.00 945.00 1159.50 7535.50
1982 1360.00 1187.00 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 2547.00
1983 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 66.00 n 0.00 z 1086.50 1541.00 2627.50
1984 1355.65 e 1307.00 1083.00 859.50 401.00 231.50 7.50 8.00 339.50 815.50 1028.00 1511.00 8947.15
1985 1608.00 1281.00 989.00 546.00 293.00 114.50 0.50 42.50 414.50 685.50 1208.50 1371.00 8554.00
1986 1258.50 1033.50 784.50 716.00 488.00 59.50 45.50 0.00 z 400.00 674.50 1004.00 1321.00 7785.00
1987 1451.00 1043.50 1065.50 528.50 357.50 90.50 45.50 87.00 224.50 539.50 1028.00 1372.00 7833.00
1988 1430.00 1082.00 1091.50 609.00 433.00 44.00 2.50 12.50 277.50 413.50 1041.50 1419.50 7856.50
1989 1365.50 1477.00 905.50 587.00 416.50 203.00 3.50 58.00 253.00 618.50 900.50 1292.50 8080.50
1990 1230.50 1148.00 922.00 587.00 498.00 154.50 12.50 11.50 134.00 632.50 972.00 1568.00 7870.50
1991 1434.00 954.00 984.50 792.00 489.00 134.50 16.50 13.00 270.50 632.50 1138.50 1514.50 8373.50
1992 1496.50 1084.50 855.50 519.50 330.00 178.50 64.00 67.50 257.00 536.00 1174.00 1492.00 8055.00
1993 1568.00 1484.00 998.00 783.50 404.00 308.50 154.50 103.00 307.50 709.50 1185.50 1319.50 9325.50
1994 1206.50 1236.31 b 896.93 a 691.00 302.00 98.00 28.50 11.00 213.50 706.00 1197.00 1272.00 7858.74
1995 1393.50 979.00 0.00 z 798.50 675.59 b 297.50 63.50 15.50 293.00 699.00 863.00 1181.00 7259.09
1996 1364.00 1133.00 1044.70 a 717.50 488.00 94.00 2.00 23.00 356.50 733.50 982.76 a 1294.50 8233.46
1997 1391.50 1215.93 a 962.00 896.00 408.50 124.50 55.00 50.00 252.00 669.50 1070.50 1501.50 8596.93
1998 1253.50 1154.50 1131.00 765.50 456.50 361.00 0.00 19.00 173.00 642.50 929.50 1333.00 8219.00
1999 1205.00 1094.50 897.50 851.79 b 555.50 202.50 10.00 19.50 360.50 531.00 802.00 0.00 z 6529.79
2000 1244.50 1025.00 985.50 603.50 354.00 135.50 3.50 20.50 344.48 a 652.00 1322.07 a 1362.50 8053.05
2001 1381.10 b 1241.00 965.50 687.00 354.50 144.00 0.00 a 8.50 153.62 a 588.50 966.00 1437.88 a 7927.61
2002 1386.50 1172.00 1137.00 665.50 443.50 114.00 1.00 28.50 249.00 783.00 1071.00 1215.00 8266.00
2003 1063.50 1166.00 935.50 649.00 409.50 193.00 0.00 21.00 244.50 465.00 1199.00 1309.00 7655.00
2004 1520.50 1374.00 876.50 645.50 403.00 172.50 25.50 86.50 275.00 622.50 1033.50 1169.00 8204.00
2005 1174.50 1149.50 1004.50 719.50 471.00 237.50 6.50 50.50 271.50 562.00 952.50 1367.50 7967.00
2006 1262.50 1223.50 1055.50 633.00 373.00 59.00 1.50 45.00 332.00 728.00 999.50 1338.50 8051.00
2007 1614.00 1053.00 827.00 654.00 401.50 106.00 0.00 7.50 254.50 512.00 888.00 1456.00 7773.50
2008 1610.00 1252.00 1143.00 841.00 524.50 203.50 1.00 35.00 296.50 637.50 874.50 1337.50 8756.00
2009 1242.50 1060.00 1015.50 762.00 391.50 243.50 21.00 77.00 167.00 850.00 940.50 1540.00 8310.50
2010 1352.00 1162.50 971.50 765.00 629.00 184.50 32.50 46.50 166.50 527.00 1072.00 1267.00 8176.00
2011 916.50 j 1242.00 994.50 800.50 594.00 189.00 0.50 0.00 147.00 526.45 c 1113.00 1335.00 6941.95
2012 1154.00 1144.50 764.50 563.50 348.50 86.50 0.50 1.00 133.00 623.50 812.50 1326.00 6958.00
2013 1463.20 a 1101.00 924.00 41.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 65.50 z 3488.20
Period of Record Statistics
MEAN 1385.92 1160.58 1033.83 724.42 450.43 174.34 20.58 43.95 265.16 631.31 1032.30 1339.59 8250.03
S.D. 161.93 133.64 128.22 102.36 90.89 74.94 25.25 34.09 90.57 104.15 126.65 131.36 429.85
SKEW 0.45 0.47 0.30 -0.10 0.32 0.26 2.73 0.81 0.85 0.37 0.07 0.00 -0.25
MAX 1856.00 1484.00 1333.00 902.00 675.59 361.00 154.50 150.00 545.50 901.00 1322.07 1626.50 9325.50
MIN 1063.50 913.50 764.50 519.50 274.50 19.50 0.00 0.00 133.00 413.50 729.50 1018.00 6958.00
NO YRS 63 64 62 62 62 62 61 62 63 63 64 63 57