RIVERDALE, UTAH

Monthly Total Heating Degree Days

(427318)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 199102
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
1928 1112.50 924.50 723.50 568.00 148.80 a 111.00 15.00 9.30 a 129.50 447.00 809.00 1267.50 6265.60
1929 1310.50 1164.50 862.50 610.00 305.50 138.00 4.50 0.00 249.00 431.50 907.00 951.50 6934.50
1930 1418.50 810.00 795.00 290.00 342.50 60.00 0.00 3.50 142.50 587.50 1022.00 1473.50 6945.00
1931 1433.50 951.50 836.00 516.00 297.50 10.50 8.50 7.00 177.50 416.50 1004.00 1308.00 6966.50
1932 1462.68 a 1124.50 935.50 555.00 298.50 139.50 6.50 36.50 104.00 503.00 745.00 1452.00 7362.68
1933 1299.00 1381.00 911.50 582.00 428.00 16.00 0.00 44.00 109.00 298.50 737.00 900.50 6706.50
1934 986.50 679.00 523.50 317.50 95.00 57.50 0.00 0.00 198.00 361.00 714.50 1101.00 5033.50
1935 1051.00 869.50 831.50 507.50 369.00 52.00 0.00 0.50 0.00 z 478.00 921.50 1083.50 6164.00
1936 1211.50 1017.00 826.50 426.50 187.00 80.00 1.50 5.50 130.00 418.50 861.00 1006.00 6171.00
1937 1614.00 1031.50 798.00 530.50 150.50 93.00 0.00 2.50 69.00 343.50 688.00 963.00 6283.50
1938 959.00 831.00 767.00 433.00 314.50 28.00 29.00 8.00 25.00 365.00 995.50 998.00 5753.00
1939 1125.50 1166.00 757.00 358.00 141.00 97.00 0.00 0.50 92.50 439.00 649.50 899.50 5725.50
1940 1059.50 790.00 605.50 395.00 96.50 34.50 0.00 0.00 117.00 355.50 870.00 1025.50 5349.00
1941 1068.50 809.00 669.50 526.50 164.00 0.00 z 1.03 a 0.50 218.50 463.00 803.00 974.00 5697.53
1942 1393.45 a 1129.00 935.50 472.00 437.50 66.00 i 0.00 a 18.71 b 151.00 308.00 g 787.00 1031.50 6355.66
1943 1083.00 922.44 a 812.50 299.50 311.66 c 117.00 7.00 14.00 61.55 a 376.50 751.00 1057.50 5813.66
1944 1404.00 1034.00 902.10 a 37.00 z 0.00 z 113.50 0.00 4.00 112.00 281.50 798.50 1069.00 5718.60
1945 1009.50 819.00 817.00 575.00 218.55 a 185.00 2.50 2.00 221.50 330.50 840.00 1110.50 6131.05
1946 1200.50 891.50 667.02 a 334.50 250.00 33.00 0.00 0.00 132.50 586.00 802.00 896.50 5793.52
1947 1312.00 788.00 651.50 497.00 146.00 105.00 0.00 5.00 119.50 313.50 906.50 1088.50 5932.50
1948 1081.50 961.50 911.00 458.50 260.00 35.50 3.00 8.50 102.00 384.50 896.50 1221.50 6324.00
1949 1592.50 1131.00 722.00 339.00 191.00 68.50 0.00 0.00 71.50 544.50 623.00 1100.00 6383.00
1950 1222.00 830.50 752.00 489.00 361.50 45.60 e 6.50 2.50 164.50 250.50 717.50 933.00 5775.10
1951 1174.00 870.50 859.00 428.00 248.50 127.00 3.00 8.50 91.00 472.50 861.43 b 1200.50 6343.93
1952 1205.50 1104.50 1017.00 393.00 182.50 44.00 0.00 3.00 41.00 248.50 902.50 1047.00 6188.50
1953 818.50 822.50 673.50 566.50 415.00 82.00 0.00 0.00 44.00 361.00 599.00 1094.00 5476.00
1954 967.50 821.00 790.00 358.00 177.50 101.00 4.50 14.00 81.00 395.00 605.50 1059.34 b 5374.34
1955 1321.50 1138.50 917.00 573.50 237.50 85.50 4.50 0.00 136.50 360.50 881.00 907.27 a 6563.27
1956 932.00 1118.50 707.50 416.50 193.00 35.00 1.00 21.50 56.50 361.00 906.00 1088.00 5836.50
1957 1228.00 689.50 699.00 516.00 251.00 59.50 1.50 2.00 95.00 404.50 930.00 1000.00 5876.00
1958 1086.50 675.00 824.00 555.00 99.00 19.50 0.00 0.50 100.50 278.00 772.00 892.50 5302.50
1959 991.00 848.50 750.50 408.50 320.00 39.00 8.00 2.00 197.00 381.00 737.00 1040.50 5723.00
1960 1194.50 1049.00 697.00 420.00 241.00 14.50 0.00 41.00 16.55 a 384.00 709.50 1049.50 5816.55
1961 1053.00 782.50 736.00 504.50 211.50 26.50 0.00 0.00 213.00 459.00 890.50 1114.50 5991.00
1962 1333.50 940.00 889.50 370.00 270.00 98.00 2.00 28.00 47.50 290.00 655.00 1051.00 5974.50
1963 1314.00 698.00 759.50 589.00 137.95 a 105.50 0.00 2.00 31.00 226.00 768.00 1209.00 5839.95
1964 1299.00 1177.00 1021.00 0.00 z 286.50 129.00 0.00 56.00 111.00 322.00 804.00 973.50 6179.00
1965 1024.50 870.00 0.00 z 418.50 306.50 58.50 0.00 21.00 239.50 286.00 594.00 1079.50 4898.00
1966 1129.00 1006.50 719.50 477.41 a 129.00 43.50 0.00 2.50 58.50 421.50 629.50 1113.50 5730.41
1967 1055.50 805.50 624.50 571.50 257.00 91.50 0.00 0.00 55.00 365.00 654.00 1213.00 5692.50
1968 1221.00 788.00 627.00 565.50 267.00 58.45 a 2.50 41.00 155.50 414.50 807.50 1118.50 6066.45
1969 998.50 939.50 841.65 a 422.00 70.50 80.50 6.00 0.00 22.50 570.00 753.50 1008.50 5713.15
1970 1014.00 691.00 791.00 632.50 229.50 76.50 0.00 0.00 203.50 557.00 705.50 1100.50 6001.00
1971 1050.00 868.00 781.00 500.00 249.50 54.50 0.00 0.00 203.00 546.00 828.00 1249.50 6329.50
1972 1110.50 837.50 566.50 487.00 177.50 8.50 0.50 2.07 a 100.00 g 337.50 f 594.00 i 1348.50 d 4538.57
1973 1327.00 940.50 792.00 547.20 e 180.50 96.00 0.00 e 0.00 g 147.50 366.12 b 645.50 f 1016.05 b 5412.87
1974 1179.00 973.50 633.78 d 484.44 c 219.67 b 45.54 b 1.00 1.50 54.11 b 302.80 c 707.68 b 927.50 f 4603.02
1975 1245.50 919.50 831.00 687.32 b 319.00 f 129.60 e 0.00 l 4.50 m 30.50 k 291.50 k 481.00 m 491.50 p 3812.92
1976 632.00 n 544.50 m 598.50 j 249.50 p 50.00 q 145.96 d 0.00 19.00 79.44 c 509.90 b 713.57 b 1099.50 2567.37
1977 1197.24 b 875.00 b 920.00 388.00 388.50 0.00 a 0.50 21.50 138.10 a 362.18 a 771.00 950.50 6012.53
1978 1020.00 813.00 638.08 a 528.50 349.86 c 79.20 e 3.21 b 40.50 212.78 c 369.62 e 915.00 b 1290.08 e 6259.82
1979 1431.88 b 1022.61 e 787.29 b 543.00 289.33 d 120.60 e 0.00 c 1.00 f 37.76 a 289.00 f 955.00 c 850.50 g 5187.47
1980 1076.14 c 900.67 c 821.50 e 462.32 b 349.50 127.78 c 0.00 c 29.21 e 130.71 b 466.00 785.17 a 1067.20 d 6216.22
1981 1121.34 b 916.72 c 726.36 b 407.14 b 312.07 a 79.82 b 2.07 a 0.00 d 65.56 c 524.42 a 673.89 c 698.50 h 4829.39
1982 0.00 z 1008.50 786.00 615.50 317.00 97.50 21.00 0.00 165.50 555.50 862.50 1113.00 5542.00
1983 985.50 816.50 721.27 a 634.00 388.00 84.50 22.50 0.00 101.50 373.00 302.50 s 944.50 f 4126.77
1984 1336.50 1172.50 885.00 598.50 254.00 137.50 0.00 0.00 157.00 584.50 764.50 1197.00 7087.00
1985 1331.00 1183.00 906.00 385.50 180.50 50.50 0.00 27.00 233.50 472.50 942.00 1232.00 6943.50
1986 1144.00 732.00 528.00 514.00 323.50 18.50 7.00 0.00 235.00 455.50 771.00 1091.00 5819.50
1987 1230.00 823.50 722.00 340.00 155.50 40.50 20.50 19.50 95.50 320.50 742.00 1100.50 5610.00
1988 1282.50 940.50 831.50 459.00 304.00 42.50 0.00 0.00 178.50 193.50 800.50 1168.50 6201.00
1989 1365.00 1131.00 640.00 360.00 254.00 57.00 0.00 20.00 66.50 385.50 757.00 1069.00 6105.00
1990 1028.00 923.50 648.00 336.00 310.50 62.50 0.50 0.00 29.00 442.00 727.00 1373.50 5880.50
1991 1276.00 784.50 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 2060.50
Period of Record Statistics
MEAN 1185.62 928.16 772.50 475.72 250.81 73.34 3.17 9.93 120.41 402.74 792.04 1097.20 6075.48
S.D. 166.41 152.66 111.84 95.76 88.64 41.19 6.12 14.01 64.37 96.23 106.26 133.09 493.79
SKEW 0.36 0.54 -0.06 -0.04 0.03 0.34 2.62 1.51 0.30 0.17 0.13 0.82 0.58
MAX 1614.00 1381.00 1021.00 687.32 437.50 185.00 29.00 56.00 249.00 587.50 1022.00 1473.50 7362.68
MIN 818.50 675.00 523.50 290.00 70.50 0.00 0.00 0.00 16.55 193.50 594.00 892.50 5033.50
NO YRS 62 63 61 60 60 61 62 60 60 59 59 58 48