DELTA, COLORADO

Monthly Total Heating Degree Days

(052192)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 199912
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
1893 1274.50 975.15 b 815.50 470.00 244.00 22.00 0.00 0.00 141.00 507.50 848.79 a 1016.50 6314.95
1894 1269.00 1163.56 a 720.50 443.00 125.00 40.00 0.00 2.00 i 163.00 480.50 828.62 a 1055.50 6288.68
1895 1129.00 1036.50 724.50 386.00 151.50 56.50 7.23 a 0.00 78.10 a 339.34 c 908.50 1430.13 a 6247.31
1896 1108.50 937.67 b 715.50 333.75 b 73.00 h 0.00 j 0.00 z 33.00 q 272.14 b 0.00 z 0.00 z 1302.00 4669.56
1897 1305.50 998.50 864.00 401.00 104.50 33.50 3.00 0.00 38.00 454.00 800.50 1329.79 b 6332.29
1898 1468.37 a 952.50 839.00 337.24 a 224.00 33.00 0.00 4.00 108.50 532.00 881.00 1378.00 6757.61
1899 1344.00 1006.00 671.00 432.00 252.50 47.00 k 0.00 2.00 53.00 458.00 661.50 1229.15 a 6109.15
1900 1012.00 865.00 573.50 421.00 119.00 2.50 0.00 5.00 146.50 407.00 771.50 1095.50 5418.50
1901 1153.00 785.00 788.50 416.00 117.50 41.00 0.00 0.00 77.00 364.00 745.50 1092.50 5580.00
1902 1148.50 891.50 856.50 387.50 172.50 14.50 17.00 9.00 114.50 463.50 809.00 1373.50 6257.50
1903 1524.00 1370.50 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 2894.50
1904 0.00 z 0.00 z 0.00 z 310.50 f 206.50 55.50 0.50 1.50 85.50 h 535.50 0.00 z 0.00 z 799.50
1905 0.00 z 0.00 z 0.00 z 0.00 z 232.50 a 4.00 0.00 0.00 48.00 516.00 738.50 1316.50 2855.50
1906 1306.00 799.00 723.00 400.50 185.00 41.00 2.00 0.00 95.50 0.00 z 0.00 z 0.00 z 3552.00
1907 0.00 z 661.50 591.00 394.00 325.00 45.00 0.00 2.00 85.00 286.00 793.00 1086.50 4269.00
1908 1101.50 810.00 670.00 424.50 301.50 50.50 0.00 2.00 111.50 538.50 882.50 1193.00 6085.50
1909 1046.50 932.00 707.00 503.50 295.00 17.00 0.00 0.00 77.00 316.50 683.00 1477.00 6054.50
1910 1237.50 922.00 516.50 364.50 162.00 2.50 0.00 0.00 48.50 443.50 618.00 1158.00 5473.00
1911 1063.00 749.00 604.50 425.17 a 181.00 14.50 0.00 2.00 48.00 505.50 922.00 1318.50 5833.17
1912 1206.00 975.00 739.50 606.50 247.50 13.50 q 13.50 2.50 274.00 567.00 854.00 721.00 o 5485.50
1913 1548.00 986.50 866.45 a 450.50 151.50 23.00 0.00 3.50 135.00 504.00 695.00 1356.00 6719.45
1914 1210.50 941.00 681.00 383.00 156.50 32.50 0.00 18.00 66.00 431.00 780.00 1321.00 6020.50
1915 1449.50 925.50 736.50 326.50 292.50 78.00 0.00 0.00 119.50 437.00 772.50 1094.00 6231.50
1916 1334.00 1023.50 224.50 u 433.00 261.50 37.00 0.00 7.00 128.00 466.00 870.50 1209.50 5770.00
1917 1437.00 999.50 981.00 563.50 372.00 66.00 0.00 11.50 130.50 475.50 682.50 964.50 6683.50
1918 1413.00 1014.50 578.00 525.00 234.50 6.50 0.00 0.00 123.00 325.00 890.50 1221.00 6331.00
1919 1489.00 958.00 763.50 402.00 133.82 a 42.93 a 0.00 0.00 82.76 a 538.50 874.00 1473.00 6757.51
1920 1391.00 881.00 790.50 627.00 170.00 21.00 0.00 12.50 151.00 460.50 774.50 1186.00 6465.00
1921 1055.50 805.00 603.50 498.00 179.50 26.50 11.00 0.50 58.45 a 308.50 676.55 a 886.50 5109.50
1922 1196.00 921.50 756.00 529.50 204.00 12.00 0.00 0.00 37.00 429.00 820.00 975.50 5880.50
1923 978.00 906.50 842.00 425.00 191.00 33.50 0.00 0.50 150.50 491.50 781.00 1151.50 5951.00
1924 1535.50 826.00 849.50 452.00 176.50 25.00 0.00 2.00 160.00 410.00 773.00 1348.00 6557.50
1925 1525.50 914.50 643.25 a 0.00 z 101.50 51.00 0.00 13.50 88.50 431.50 865.50 1073.00 5707.75
1926 1204.50 762.50 686.65 a 324.50 145.50 22.24 a 1.00 0.50 97.50 363.22 a 735.00 1117.00 5460.11
1927 1045.00 803.92 b 778.50 399.50 167.40 a 27.50 5.00 0.00 102.50 393.00 665.00 1209.50 5596.82
1928 1060.00 895.50 612.50 509.00 130.00 51.00 0.00 11.00 56.50 382.50 747.50 1247.50 5703.00
1929 1399.65 a 1139.00 801.50 516.50 210.50 21.50 0.00 0.00 a 127.00 418.00 947.00 1095.00 6675.65
1930 1450.50 944.50 736.00 284.48 a 244.00 31.50 0.00 0.00 103.45 a 457.50 996.00 1515.00 6762.93
1931 1354.50 778.00 791.50 393.50 207.00 4.00 0.00 2.00 73.50 357.53 a 925.50 1404.30 a 6291.33
1932 1397.50 814.50 776.55 a 407.00 132.50 59.00 0.00 11.00 77.50 454.00 851.50 1336.00 6317.05
1933 1400.00 1242.50 705.50 553.00 278.00 2.50 0.00 2.00 27.00 305.50 792.50 1015.50 6324.00
1934 1018.00 664.00 493.50 245.00 55.50 19.50 0.00 0.00 100.50 346.50 753.00 1094.00 4789.50
1935 1045.50 846.00 735.00 391.50 193.50 18.50 0.00 0.00 58.00 392.50 820.50 1153.72 a 5654.72
1936 1151.50 849.50 647.00 342.00 110.00 32.00 2.00 0.50 84.00 397.50 881.50 1100.00 5597.50
1937 1501.50 913.50 690.50 420.00 91.00 50.50 0.00 0.00 62.50 356.00 710.50 1052.50 5848.50
1938 1145.50 0.00 z 662.00 394.50 201.00 4.14 a 0.00 0.00 22.50 364.50 1019.00 1186.00 4999.14
1939 1233.50 1168.00 682.52 a 311.38 a 85.00 25.00 0.00 h 0.00 27.32 b 397.00 759.50 1034.00 5723.22
1940 1168.50 826.00 628.00 382.00 64.50 10.50 0.00 5.00 50.00 357.50 858.50 1114.00 5464.50
1941 1121.00 769.00 663.00 475.50 105.50 55.00 0.00 a 1.00 111.21 a 375.00 804.50 1023.00 5503.71
1942 1231.00 1044.50 834.00 347.00 210.50 8.50 0.00 0.00 70.50 332.50 704.50 1029.50 5812.50
1943 1087.50 803.00 720.50 224.00 176.00 34.50 0.00 4.50 15.00 324.00 794.00 1036.50 5219.50
1944 1228.50 871.50 766.50 509.50 128.00 32.00 0.50 0.00 20.00 190.00 h 750.50 1130.00 5437.00
1945 1138.50 760.00 763.50 549.50 102.50 62.50 0.00 0.00 96.00 319.50 800.00 1249.00 5841.00
1946 1226.50 875.50 622.50 241.00 221.00 18.00 0.00 0.00 74.50 441.00 838.00 1028.00 5586.00
1947 1255.00 806.00 648.50 391.00 82.00 61.50 0.00 0.00 70.50 275.00 882.00 1092.50 5564.00
1948 1284.50 1041.00 859.00 370.50 116.50 20.50 0.00 0.50 25.50 391.50 969.00 1049.50 6128.00
1949 1363.00 1085.00 673.00 340.50 143.50 33.50 0.00 0.00 30.00 458.50 741.50 1110.00 5978.50
1950 1193.50 831.50 724.00 355.00 214.00 23.50 0.00 0.00 99.50 233.50 743.00 1004.50 5422.00
1951 1174.00 921.50 755.00 425.50 183.50 76.50 0.00 1.00 87.50 433.00 918.00 1249.50 6225.00
1952 1124.00 987.50 853.50 410.00 122.00 5.69 a 0.00 0.00 60.50 376.00 985.50 1250.50 6175.19
1953 1024.50 936.00 703.50 518.50 328.00 6.50 0.00 8.50 65.50 439.50 792.50 1276.50 6099.50
1954 1075.50 774.00 807.50 325.00 112.50 37.50 0.00 0.00 63.00 372.00 741.00 1271.50 5579.50
1955 1208.50 1145.00 770.50 488.50 184.00 40.50 0.00 0.00 72.50 384.50 872.00 958.50 6124.50
1956 920.50 998.00 774.50 446.00 129.50 3.00 0.00 4.50 52.50 389.50 1023.00 1338.00 6079.00
1957 1170.00 864.50 713.50 510.00 299.50 46.00 0.00 8.00 149.50 430.00 921.50 1087.50 6200.00
1958 1234.50 794.00 841.50 540.50 115.00 0.00 0.00 0.00 98.50 402.50 794.00 995.00 5815.50
1959 1115.00 832.00 754.50 400.00 129.00 4.00 1.00 0.00 153.50 468.50 864.50 1086.00 5808.00
1960 1266.50 1051.00 693.00 391.50 190.00 8.00 0.00 9.50 60.50 435.00 762.00 1239.00 6106.00
1961 1263.50 834.00 693.50 453.00 131.00 11.00 0.00 2.00 231.00 434.50 860.50 1320.00 6234.00
1962 1340.50 775.50 832.00 318.50 175.50 35.00 0.00 11.00 83.00 372.50 691.00 1114.50 5749.00
1963 1538.50 786.00 738.50 411.00 67.50 23.00 0.00 4.50 31.50 254.50 719.50 1195.00 5769.50
1964 1288.00 1093.50 911.00 485.50 196.00 45.00 0.00 10.00 113.50 367.00 874.00 1097.50 6481.00
1965 1030.50 912.00 847.50 464.50 243.00 45.50 0.00 4.00 189.50 405.00 651.50 1013.00 5806.00
1966 1243.50 1000.00 700.50 428.50 99.50 10.50 0.00 5.50 51.00 451.50 685.50 1149.50 5825.50
1967 1179.00 853.50 548.50 432.50 248.00 63.00 0.00 0.00 68.50 378.50 778.00 1325.00 5874.50
1968 1415.00 838.00 715.00 581.50 260.00 31.50 0.00 25.50 142.50 429.50 870.50 1271.50 6580.50
1969 1038.50 932.00 880.00 427.00 117.50 89.00 0.00 0.00 83.50 597.50 841.50 1015.00 6021.50
1970 1109.00 774.00 806.00 628.50 164.00 60.00 0.00 0.50 166.50 574.00 767.50 1046.50 6096.50
1971 1180.00 925.50 790.00 499.50 255.00 35.50 0.00 0.00 180.00 444.00 825.50 1249.50 6384.50
1972 1118.00 869.00 601.40 a 404.00 218.00 2.50 0.00 9.50 114.00 0.00 z 891.50 0.00 z 4227.90
1973 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
1974 1459.50 1271.50 599.00 518.00 121.00 31.50 0.00 5.00 121.50 352.00 790.00 1207.50 6476.50
1975 1441.50 939.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 4.00 142.00 486.50 886.50 1172.00 5072.00
1976 1361.00 775.50 805.50 465.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 806.00 1175.50 5388.50
1977 1252.50 854.00 846.50 355.50 165.00 0.00 0.00 4.00 73.00 371.50 776.00 971.50 5669.50
1978 0.00 z 826.00 558.00 376.50 251.50 14.00 0.00 4.50 131.50 398.50 747.00 0.00 z 3307.50
1979 1463.41 b 0.00 z 771.00 458.50 202.57 b 54.00 0.00 23.00 47.50 342.00 964.66 a 1170.00 5496.64
1980 1014.00 787.50 769.00 466.50 235.50 11.50 0.00 1.50 50.50 462.50 768.00 825.50 5392.00
1981 939.82 a 831.00 694.50 262.50 184.00 27.00 0.00 1.50 19.50 383.50 678.00 1003.88 a 5025.20
1982 1111.87 a 897.50 628.00 459.00 168.50 13.50 2.00 f 0.00 84.00 510.00 795.00 1051.50 5718.87
1983 1048.00 763.50 693.00 520.00 285.50 58.00 0.00 0.00 62.00 345.50 740.00 1072.50 5588.00
1984 1404.50 1015.00 742.00 496.00 142.00 i 0.00 t 0.00 7.00 56.50 473.50 714.50 977.50 5886.50
1985 1054.00 945.00 688.00 357.50 139.50 12.00 0.00 0.00 z 119.00 342.00 656.90 a 1034.00 5347.90
1986 960.50 697.00 539.40 a 383.00 176.50 6.50 0.00 0.00 140.00 423.00 369.00 o 977.50 4303.40
1987 1124.86 c 773.50 773.00 347.07 a 158.00 5.69 a 0.00 z 13.00 114.00 349.00 745.50 1081.00 5484.62
1988 1343.00 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 1183.00 2526.00
1989 1335.50 966.50 632.50 364.00 211.50 58.50 k 0.00 73.00 308.00 340.50 435.50 k 1153.50 5385.00
1990 1169.00 872.00 630.00 348.50 249.50 20.00 0.00 2.50 59.50 425.00 799.00 1409.50 5984.50
1991 1557.00 1006.50 750.00 521.50 174.50 27.00 0.00 2.00 93.00 397.00 833.00 1309.50 6671.00
1992 1487.00 877.00 626.00 280.00 91.50 27.50 7.00 0.00 t 75.00 308.00 929.00 1199.50 5907.50
1993 991.50 789.50 655.00 478.00 179.50 54.00 9.50 35.00 236.50 603.50 1060.50 1257.50 6350.00
1994 1237.50 1018.50 762.50 540.50 244.00 0.50 0.00 0.00 71.00 431.00 801.00 1023.00 6129.50
1995 990.50 660.50 619.50 481.50 299.50 67.00 21.50 0.00 110.50 466.00 682.50 963.00 5362.00
1996 1164.00 780.50 687.00 451.00 108.00 12.00 0.00 0.00 150.00 446.00 719.50 1061.50 5579.50
1997 1059.50 878.00 641.50 564.50 156.00 15.00 1.00 m 0.00 55.00 386.00 781.50 1143.50 5680.50
1998 961.00 817.70 a 705.50 266.50 p 0.00 z 56.00 0.00 0.00 n 1.00 t 221.50 m 325.00 p 1218.96 c 3759.17
1999 1054.55 c 599.00 g 557.50 512.14 b 288.76 d 38.28 a 0.00 f 0.55 c 132.32 b 421.60 a 731.25 b 1137.50 4874.46
Period of Record Statistics
MEAN 1225.55 904.08 720.18 428.63 183.28 29.76 1.05 4.26 97.64 414.48 806.40 1158.67 5971.90
S.D. 165.88 129.49 94.51 84.68 66.80 20.79 3.51 9.19 55.63 73.44 91.81 139.91 442.54
SKEW 0.27 0.89 -0.02 0.01 0.39 0.53 4.00 4.97 1.34 0.21 0.44 0.35 -0.18
MAX 1557.00 1370.50 981.00 628.50 372.00 89.00 21.50 73.00 308.00 603.50 1060.50 1515.00 6762.93
MIN 920.50 660.50 493.50 224.00 55.50 0.00 0.00 0.00 15.00 233.50 618.00 825.50 4789.50
NO YRS 102 100 100 99 99 97 97 98 101 98 98 100 76