RIVERDALE, UTAH

Monthly Total Growing Degree Days

(427318)

Base Temperature = 40 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 0.00 1.00 88.50 212.50 667.53 a 677.50 1022.50 921.22 a 688.50 330.00 52.50 0.00 4661.75
1929 0.00 0.00 36.50 186.00 474.50 668.50 1072.50 1068.00 515.00 360.50 9.50 51.50 4442.50
1930 0.00 31.00 64.50 463.50 444.50 795.00 1119.00 994.00 631.50 191.00 32.50 0.00 4766.50
1931 0.00 0.00 63.50 242.50 484.00 860.50 1094.50 988.50 629.00 365.00 82.00 0.00 4809.50
1932 0.00 a 0.00 24.50 213.00 482.50 704.50 978.50 939.50 669.00 290.50 72.00 2.00 4376.00
1933 0.00 0.00 35.50 213.50 360.00 909.50 1130.50 933.00 696.00 477.00 55.00 29.50 4839.50
1934 10.50 46.00 252.50 439.50 740.00 768.50 1052.50 1016.50 594.50 417.00 141.50 2.50 5481.50
1935 3.50 11.50 76.00 245.50 406.00 780.50 1048.50 1005.00 0.00 z 335.00 3.00 0.00 3914.50
1936 0.00 0.50 44.50 392.50 631.00 879.50 1140.00 1024.00 651.00 356.50 12.50 4.00 5136.00
1937 0.00 0.00 50.00 233.00 636.00 758.00 1102.00 1059.00 802.50 434.50 85.50 13.50 5174.00
1938 8.00 25.00 80.00 331.00 473.00 851.00 1000.50 1011.00 831.50 413.00 6.00 15.00 5045.00
1939 0.00 0.00 152.50 394.50 655.50 731.00 1066.50 987.00 689.50 336.00 122.00 69.00 5203.50
1940 2.50 43.00 196.00 355.00 725.00 923.50 1111.50 1075.50 662.00 419.50 45.50 9.00 5568.00
1941 0.00 36.50 135.50 239.00 636.00 0.00 z 1046.25 a 988.00 555.50 314.00 91.50 17.50 4059.75
1942 0.00 a 0.00 28.50 288.00 352.00 489.50 i 1075.70 a 966.34 b 642.00 309.50 g 60.00 4.50 3417.04
1943 20.50 5.19 a 110.00 450.50 477.73 c 693.00 1026.00 1001.50 754.14 a 415.50 83.00 0.00 5037.06
1944 0.00 2.00 16.02 a 13.00 z 0.00 z 671.50 1050.50 1004.50 683.50 497.50 80.00 0.00 4005.52
1945 8.00 14.50 73.00 220.50 560.07 a 600.00 1072.00 1058.50 592.00 450.00 59.50 4.00 4712.07
1946 0.00 10.50 150.35 a 423.00 528.50 830.00 1100.00 1047.00 678.00 203.50 29.00 53.50 5053.35
1947 1.50 26.50 161.00 265.00 675.50 684.50 1107.50 986.00 706.50 463.50 26.50 4.50 5108.50
1948 10.50 12.50 40.00 299.50 545.50 811.00 1029.00 1026.50 726.50 392.00 48.50 3.00 4944.50
1949 0.00 0.50 99.50 411.00 603.50 751.50 1053.50 1044.00 764.50 248.00 131.00 3.50 5110.50
1950 11.00 52.00 93.50 268.00 423.00 799.80 e 991.00 992.00 672.50 525.00 99.50 8.00 4935.30
1951 0.00 33.50 62.50 326.00 536.00 653.50 1041.50 974.50 689.00 305.00 35.36 b 3.00 4659.86
1952 0.00 0.00 13.50 357.50 600.00 824.50 1035.00 1042.50 811.50 526.50 45.50 1.00 5257.50
1953 49.50 34.50 159.50 218.50 361.50 759.50 1104.50 1030.00 790.00 414.00 199.50 0.00 5121.00
1954 7.50 35.00 77.50 395.00 649.50 754.50 1165.00 990.50 752.00 381.00 175.00 1.07 b 5383.57
1955 0.00 0.00 34.00 214.50 553.50 765.00 1092.00 1131.50 747.50 418.00 56.00 60.97 a 5072.97
1956 12.50 2.00 179.50 341.00 626.00 875.00 1124.50 992.50 813.50 430.50 56.50 3.00 5456.50
1957 0.00 76.50 120.50 236.00 531.00 806.50 1082.00 1103.00 731.00 376.50 12.00 6.00 5081.00
1958 1.00 93.50 58.00 202.00 763.00 880.00 1038.50 1152.50 757.00 503.00 115.50 19.50 5583.50
1959 11.00 15.50 87.00 347.00 471.00 926.00 1117.50 999.00 635.00 394.00 81.50 0.50 5085.00
1960 0.00 0.50 174.50 331.50 563.50 899.00 1224.50 985.50 831.72 a 396.00 95.00 6.50 5508.22
1961 0.50 28.00 95.00 251.50 605.00 994.50 1151.50 1087.50 564.00 332.50 12.00 3.00 5125.00
1962 6.00 26.00 45.00 386.50 508.00 792.00 1040.50 992.00 776.50 492.50 153.50 4.50 5223.00
1963 2.50 81.00 105.50 183.50 659.27 a 693.50 1097.50 1094.00 812.00 568.00 88.00 0.00 5384.77
1964 0.00 0.00 26.00 0.00 z 522.50 681.00 1136.50 963.00 671.50 453.00 77.00 42.50 4573.00
1965 15.00 24.00 0.00 z 342.50 485.50 746.50 1051.00 945.50 526.50 490.00 204.50 3.50 4834.50
1966 0.00 0.00 163.50 290.17 a 724.00 857.50 1223.00 1059.50 823.00 360.00 171.50 18.00 5690.17
1967 5.00 26.50 186.00 191.50 553.50 720.00 1164.50 1156.00 791.50 413.50 174.00 0.00 5382.00
1968 0.50 48.00 174.00 199.00 515.00 828.62 a 1146.00 897.00 646.50 361.00 67.50 0.00 4883.12
1969 32.00 0.00 91.97 a 336.00 756.50 745.50 1124.00 1157.00 854.00 216.00 86.50 15.50 5414.97
1970 33.50 58.50 56.50 143.00 566.50 834.50 1091.00 1118.00 583.50 244.50 75.00 4.50 4809.00
1971 24.50 28.00 117.00 255.50 532.50 809.50 1108.00 1105.00 592.50 280.50 47.00 2.00 4902.00
1972 2.00 72.00 252.00 263.50 630.00 888.50 1084.50 1063.30 a 513.00 g 306.00 f 12.50 i 0.00 d 4255.80
1973 0.00 2.50 34.00 213.60 e 618.50 836.50 1123.75 e 821.00 g 645.00 410.48 b 78.50 f 10.16 b 3894.49
1974 7.00 0.00 191.17 d 276.11 c 584.72 b 952.50 b 1162.00 1034.00 769.29 b 476.07 c 75.54 b 0.00 f 5528.39
1975 3.50 2.00 73.00 114.11 b 319.50 f 658.80 e 708.00 l 568.00 m 475.00 k 232.00 k 40.00 m 5.50 p 851.41
1976 0.00 n 6.00 m 43.50 j 104.00 p 311.00 q 683.65 d 1106.50 895.00 731.11 c 266.71 b 131.79 b 0.00 3814.76
1977 0.00 b 24.23 b 35.50 394.00 389.50 939.31 a 1046.50 985.50 671.38 a 412.82 a 83.00 20.00 5001.74
1978 0.00 29.50 181.35 a 228.50 431.23 c 747.00 e 1050.26 b 935.00 598.33 c 405.38 e 54.11 b 0.00 e 4660.67
1979 0.00 b 1.22 e 71.62 b 243.00 503.46 d 751.80 e 1063.41 c 790.00 f 827.59 a 354.00 f 16.11 c 0.50 g 3478.21
1980 6.09 c 35.13 c 38.15 e 309.64 b 433.50 704.44 c 1073.93 c 919.87 e 655.18 b 331.50 125.69 a 5.17 d 4638.29
1981 0.00 b 19.04 c 73.76 b 357.86 b 469.13 a 787.50 b 1097.92 a 1094.19 d 786.11 c 255.75 a 147.22 c 29.00 h 5088.47
1982 0.00 z 31.00 85.00 203.00 467.50 751.50 998.50 1099.50 657.50 233.00 21.50 2.00 4550.00
1983 6.50 24.50 105.92 a 152.00 431.50 738.50 1019.00 1059.00 713.00 402.00 14.50 s 4.00 f 4651.92
1984 0.00 0.00 26.50 179.00 551.00 701.50 1039.50 1010.50 670.00 240.50 59.00 0.00 4477.50
1985 0.00 0.00 38.50 375.50 624.50 823.00 1114.50 919.50 541.50 307.00 52.00 0.00 4796.00
1986 0.00 98.50 262.00 242.50 495.00 933.50 965.00 1083.50 548.00 320.00 60.50 4.50 5013.00
1987 1.50 13.00 113.00 434.50 652.50 825.50 958.00 952.00 699.00 454.50 109.50 21.50 5234.50
1988 0.00 21.00 68.50 301.00 518.00 906.50 1114.00 1023.50 654.50 589.50 102.50 0.00 5299.00
1989 0.00 12.00 184.50 398.50 550.00 790.50 1179.00 1005.50 748.50 408.00 72.50 1.50 5350.50
1990 9.50 17.00 179.00 417.00 471.50 829.50 1098.00 1038.50 894.50 334.00 98.00 0.00 5386.50
1991 0.00 34.00 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 34.00
Period of Record Statistics
MEAN 5.05 21.68 100.20 290.63 548.10 790.91 1082.96 1020.52 697.42 380.30 79.07 9.56 5068.46
S.D. 9.40 24.50 63.85 87.64 101.27 87.70 56.68 64.46 90.11 91.60 49.21 15.93 315.76
SKEW 2.77 1.35 0.75 0.20 0.17 0.16 0.12 0.19 -0.01 -0.05 0.67 2.33 -0.19
MAX 49.50 98.50 262.00 463.50 763.00 994.50 1224.50 1157.00 894.50 589.50 204.50 69.00 5690.17
MIN 0.00 0.00 13.50 114.11 352.00 600.00 958.00 895.00 515.00 191.00 3.00 0.00 4376.00
NO YRS 62 63 61 60 60 61 62 60 60 59 59 58 48