ROCK RAPIDS, IOWA

Monthly Total Growing Degree Days

(137147)

Base Temperature = 50 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 201302
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 0.00 z 0.00 z 0.00 z 0.00 w 232.00 621.50 770.35 a 564.50 370.50 68.00 11.50 0.00 2638.35
1894 0.00 0.00 17.57 a 131.00 325.00 680.50 842.00 705.00 445.00 160.50 0.00 0.00 3306.57
1895 0.00 a 0.00 9.00 166.00 312.00 464.50 656.50 623.50 476.50 90.50 5.69 a 0.00 2804.19
1896 0.00 0.00 0.00 a 55.50 j 268.50 508.27 d 662.00 637.05 a 193.50 9.50 0.00 b 0.00 2278.82
1897 0.00 0.00 0.00 49.66 a 211.32 a 503.00 701.00 487.50 565.50 175.67 a 0.00 i 0.00 2693.64
1898 0.00 0.00 z 0.00 b 36.00 189.50 0.00 z 611.73 a 0.00 z 0.00 z 42.00 0.00 z 0.00 879.23
1899 0.00 0.00 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 0.00
1900 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
1901 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
1902 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
1903 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
1904 0.00 0.00 0.00 13.50 318.50 519.00 600.50 543.50 315.00 145.00 2.00 0.00 2457.00
1905 0.00 0.00 40.30 a 32.00 187.00 529.50 623.50 761.00 532.00 125.00 2.00 0.00 2832.30
1906 0.00 0.00 0.00 64.00 0.00 z 473.00 640.00 683.00 419.00 15.00 1.00 0.00 2295.00
1907 0.00 0.00 47.00 3.00 115.00 421.00 657.00 633.00 314.00 29.00 6.00 0.00 2225.00
1908 0.00 0.00 2.00 131.50 221.00 485.50 744.50 608.00 582.50 0.00 z 0.00 z 0.00 z 2775.00
1909 0.00 0.00 0.00 0.50 244.00 552.50 739.50 845.50 400.00 151.50 35.50 0.00 2969.00
1910 0.00 0.00 68.00 198.62 a 0.00 z 545.50 j 779.50 676.83 a 313.00 165.85 a 0.00 0.00 2201.80
1911 0.00 0.00 1.50 92.00 463.00 777.50 716.00 581.00 406.50 39.50 0.00 0.00 3077.00
1912 0.00 0.00 a 0.00 80.50 329.50 434.50 702.00 555.50 287.00 16.50 0.00 0.00 2405.50
1913 0.00 z 0.00 0.00 57.00 164.50 0.00 z 0.00 z 757.84 c 444.50 83.00 0.00 0.00 1506.84
1914 0.00 0.00 a 0.00 z 74.00 305.50 562.50 828.50 659.50 389.50 177.00 21.50 0.00 3018.00
1915 0.00 0.00 z 0.00 220.00 152.00 393.50 559.03 a 459.00 289.50 87.50 15.00 0.00 2175.53
1916 0.00 0.00 0.00 26.50 271.50 401.50 892.50 694.00 373.00 115.00 13.50 0.00 2787.50
1917 0.00 0.00 2.00 31.00 174.00 424.50 695.50 573.50 337.50 32.00 0.00 0.00 2270.00
1918 0.00 0.00 22.50 23.00 387.50 578.00 667.50 674.50 197.07 a 150.50 11.00 0.00 2711.57
1919 0.00 0.00 0.50 37.50 272.00 618.50 798.50 606.00 394.50 55.50 0.00 0.00 a 2783.00
1920 0.00 0.00 15.00 0.50 243.00 575.50 671.00 514.00 426.50 233.00 0.00 0.00 2678.50
1921 0.00 0.00 17.00 113.00 373.00 722.00 803.00 640.50 384.00 116.50 0.00 0.00 3169.00
1922 0.00 0.00 0.00 a 41.00 353.00 631.00 616.50 695.00 459.00 175.50 9.00 0.00 2980.00
1923 0.00 0.00 0.00 66.00 297.00 592.50 793.00 568.00 379.50 80.00 3.00 0.00 2779.00
1924 0.00 0.00 0.00 73.50 124.00 470.00 613.00 624.50 248.00 194.00 5.00 0.00 2352.00
1925 0.00 0.00 17.00 188.50 271.50 561.50 702.50 728.00 509.00 15.00 0.00 a 0.00 2993.00
1926 0.00 0.00 2.50 94.50 466.50 495.50 782.50 679.50 329.50 100.75 a 0.00 0.00 2951.25
1927 0.00 0.00 4.50 69.50 201.00 461.00 599.00 506.50 442.00 104.00 0.00 0.00 2387.50
1928 0.00 0.00 15.00 28.50 337.00 381.00 690.00 639.00 265.50 148.00 3.00 0.00 2507.00
1929 0.00 0.00 0.00 64.00 233.50 456.00 721.50 653.50 247.00 74.00 0.00 0.00 2449.50
1930 0.00 0.00 5.00 93.00 280.50 514.00 810.50 734.50 356.00 170.00 2.00 0.00 2965.50
1931 0.00 0.00 0.00 139.50 287.00 760.00 777.50 685.00 584.50 185.00 10.00 0.00 3428.50
1932 0.00 0.00 0.50 41.00 340.50 619.50 767.25 a 670.50 305.00 78.50 0.00 0.00 2822.75
1933 0.00 0.00 0.00 63.00 268.50 786.50 784.00 569.00 477.00 74.00 4.14 a 0.00 3026.14
1934 0.00 0.00 1.00 90.00 618.50 658.50 779.50 630.00 233.00 200.00 0.52 a 0.00 3211.02
1935 0.00 0.00 29.50 69.00 150.50 435.00 920.00 711.50 415.50 77.50 0.00 0.00 2808.50
1936 0.00 0.00 0.00 56.00 451.05 a 570.00 1025.50 854.50 495.52 a 103.33 a 0.00 0.00 3555.90
1937 0.00 0.00 0.00 52.50 345.50 498.10 a 799.50 838.50 429.00 85.50 0.00 a 0.00 3048.60
1938 0.00 0.00 9.50 128.50 241.00 543.50 779.50 795.00 473.50 264.50 23.00 0.00 3258.00
1939 0.00 0.00 37.00 88.00 504.00 593.00 787.00 615.35 a 529.00 110.50 2.00 0.00 3265.85
1940 0.00 0.00 0.00 30.52 a 270.50 578.50 804.00 602.00 510.50 227.50 0.50 0.00 3024.02
1941 0.00 0.00 0.00 116.00 486.50 546.00 747.00 744.52 a 444.00 125.55 a 5.50 0.00 3215.07
1942 0.00 0.00 2.00 171.50 228.50 515.00 684.00 665.00 286.00 139.50 4.50 0.00 2696.00
1943 0.00 0.00 35.50 63.00 206.00 567.50 755.50 690.50 263.50 110.57 a 0.00 0.00 2692.07
1944 2.50 0.00 0.00 17.50 461.50 573.50 659.50 630.00 347.50 84.00 20.50 0.00 2796.50
1945 0.00 0.00 35.50 51.50 168.00 383.50 656.50 678.50 371.50 110.50 1.00 0.00 2456.50
1946 0.00 0.00 49.00 138.00 202.50 563.79 a 727.00 583.50 331.50 97.00 0.00 0.00 2692.29
1947 0.00 0.00 0.00 39.50 178.00 435.00 718.17 a 914.50 483.50 279.50 1.00 0.00 a 3049.17
1948 0.00 0.00 5.50 148.50 283.50 490.50 729.50 705.00 500.00 64.50 5.50 0.00 2932.50
1949 0.00 0.00 0.00 86.00 388.50 631.50 776.00 699.05 a 247.00 135.00 5.50 0.00 2968.55
1950 0.00 0.00 0.00 14.50 212.00 540.00 554.50 525.40 b 364.00 174.50 0.00 0.00 2384.90
1951 0.00 a 0.00 0.00 53.50 320.50 395.50 636.00 584.50 238.00 128.00 0.00 0.00 2356.00
1952 0.00 0.00 0.00 125.00 264.50 655.00 729.50 624.50 408.50 41.50 10.50 0.00 2859.00
1953 0.00 0.00 1.50 29.46 b 294.00 642.50 713.50 698.00 368.00 217.00 11.00 0.00 2974.96
1954 0.00 0.00 0.00 125.00 219.00 605.00 806.50 645.00 391.55 a 70.00 7.00 0.00 2869.05
1955 0.00 0.00 1.00 175.00 416.95 a 491.00 878.33 a 853.00 445.50 144.67 a 0.00 0.00 3405.45
1956 0.00 0.00 0.00 9.00 370.00 751.00 650.00 660.00 357.50 260.00 1.50 0.00 3059.00
1957 0.00 0.00 0.00 124.00 243.50 508.00 871.50 645.50 278.00 96.00 0.00 0.00 2766.50
1958 0.00 0.00 0.00 51.00 388.00 443.50 621.00 766.00 449.00 192.00 6.00 0.00 2916.50
1959 0.00 0.00 1.50 71.50 333.50 678.00 722.50 793.50 379.50 32.00 0.00 0.00 3012.00
1960 0.00 0.00 a 0.00 93.50 275.00 490.00 716.00 709.50 385.50 122.00 0.00 0.00 2791.50
1961 0.00 0.00 7.00 30.50 220.50 557.50 684.07 a 699.00 340.50 113.50 0.00 0.00 2652.57
1962 0.00 0.00 0.00 102.50 427.50 527.00 654.00 660.50 283.00 172.50 1.50 7.00 2835.50
1963 0.00 0.00 40.00 119.50 328.00 703.00 772.50 670.00 458.00 329.50 3.00 0.00 3423.50
1964 0.00 0.00 0.00 89.00 426.00 604.50 827.50 560.50 335.00 105.50 21.50 0.00 2969.50
1965 0.00 0.00 0.00 65.00 394.50 579.50 709.50 627.00 175.50 146.00 6.00 0.00 m 2703.00
1966 0.00 0.00 16.00 32.00 269.50 561.00 853.50 578.00 329.50 113.50 0.00 0.00 b 2753.00
1967 0.00 0.00 44.43 a 84.00 214.93 a 507.00 679.50 604.50 363.62 a 145.38 b 0.52 a 0.00 a 2643.88
1968 0.00 0.00 51.00 90.50 173.00 641.50 674.00 728.50 366.00 138.00 6.50 0.00 a 2869.00
1969 0.00 a 0.00 0.00 67.50 361.50 408.50 0.00 z 575.00 f 381.50 72.00 3.00 0.00 1294.00
1970 0.00 0.00 0.00 90.00 336.50 612.50 751.00 679.50 357.50 104.50 0.00 0.00 2931.50
1971 0.00 0.00 1.50 97.50 224.00 697.50 614.00 655.00 336.50 169.00 0.00 0.00 2795.00
1972 0.00 0.00 3.00 34.00 346.00 548.50 634.50 630.50 302.00 72.00 2.50 0.00 2573.00
1973 0.00 0.00 7.50 70.50 214.00 600.00 727.00 753.00 301.00 164.00 0.00 z 0.00 2837.00
1974 0.00 0.00 3.00 91.50 225.50 544.50 868.50 0.00 z 236.50 89.00 3.50 0.00 2062.00
1975 0.00 0.00 0.00 28.00 364.00 496.50 767.25 c 704.00 236.00 137.00 18.00 0.00 2750.75
1976 0.00 0.00 16.00 120.00 272.50 613.50 841.50 755.88 a 396.00 107.50 1.50 0.00 z 3124.38
1977 0.00 0.00 15.50 227.00 545.00 641.50 810.00 557.48 a 384.00 41.50 11.79 b 0.00 3233.77
1978 0.00 0.00 z 15.50 36.00 330.00 583.97 a 723.50 672.18 a 533.04 b 92.00 16.00 0.00 a 3002.18
1979 0.00 0.00 0.00 69.31 a 219.00 562.24 a 745.50 593.00 395.00 53.00 0.00 0.00 a 2637.05
1980 0.00 0.00 0.00 a 113.00 354.00 592.76 a 781.50 648.00 379.00 97.00 5.00 0.00 2970.26
1981 0.00 0.50 4.81 b 160.34 a 254.00 580.34 a 735.22 a 613.00 366.50 48.50 11.50 0.00 2774.72
1982 0.00 0.00 z 0.00 64.50 358.00 424.50 781.50 651.50 311.00 69.50 0.00 0.00 2660.50
1983 0.00 0.00 4.50 17.00 172.50 520.50 849.50 872.50 398.50 74.00 10.50 0.00 2919.50
1984 0.00 0.00 0.00 28.50 229.50 584.50 705.50 721.00 260.50 125.50 0.00 0.00 2655.00
1985 0.00 0.00 3.50 k 187.00 419.50 469.50 693.00 522.50 343.00 39.00 0.00 0.00 2673.50
1986 0.00 0.00 25.00 76.00 327.00 658.00 793.00 511.50 304.00 84.00 0.00 0.00 2778.50
1987 0.00 0.00 11.50 166.00 198.50 n 669.00 801.50 585.50 365.50 36.00 10.00 0.00 2645.00
1988 0.00 0.00 8.50 46.00 468.00 784.50 765.00 734.50 357.00 39.50 0.00 0.00 3203.00
1989 0.00 0.00 21.00 122.50 295.00 506.50 810.00 656.50 310.50 120.50 0.00 0.00 2842.50
1990 0.00 0.00 9.00 126.50 201.50 592.50 662.50 632.00 464.00 62.50 15.50 0.00 2766.00
1991 0.00 0.00 3.00 101.50 412.50 676.50 687.00 648.50 352.00 89.00 0.00 0.00 2970.00
1992 0.00 0.00 0.00 33.50 304.50 485.00 472.00 445.00 275.00 118.50 0.00 0.00 2133.50
1993 0.00 0.00 0.50 17.00 214.00 424.00 633.00 636.00 187.50 77.00 0.00 0.00 2189.00
1994 0.00 0.00 5.50 85.50 387.00 621.00 581.00 545.00 398.50 93.50 4.50 0.00 2721.50
1995 0.00 0.00 5.00 5.00 161.00 565.50 711.50 756.00 297.00 68.50 0.00 0.00 2569.50
1996 0.00 0.00 0.00 28.00 196.00 597.50 615.50 605.50 281.50 110.00 0.00 0.00 2434.00
1997 0.00 0.00 9.00 30.50 132.50 627.50 735.00 635.00 409.00 193.50 0.00 0.00 2772.00
1998 0.00 0.00 19.50 58.50 445.00 470.50 713.00 678.50 532.00 96.00 0.00 0.00 3013.00
1999 0.00 0.00 8.50 51.50 304.00 520.50 791.50 632.50 311.50 68.50 19.00 0.00 a 2707.50
2000 0.00 0.00 22.00 59.00 329.00 504.83 a 708.00 680.45 a 358.50 138.00 12.00 0.00 2811.78
2001 0.00 0.00 0.00 86.50 311.50 566.50 793.08 a 686.50 331.00 84.50 48.50 0.00 2908.08
2002 0.00 1.00 0.00 108.50 203.00 678.00 849.00 656.00 420.00 45.00 0.00 0.00 2960.50
2003 0.00 0.00 17.50 142.00 219.00 542.50 742.00 736.00 314.50 155.00 2.00 0.00 2870.50
2004 0.00 0.00 22.00 88.00 274.00 483.50 663.00 490.50 486.50 95.50 5.50 0.00 2608.50
2005 0.00 0.00 11.50 123.50 287.00 663.00 764.50 655.00 514.50 138.50 18.00 0.00 3175.50
2006 0.00 0.00 0.00 135.50 335.00 593.00 821.00 672.50 241.50 121.00 10.50 0.00 2930.00
2007 0.00 0.00 23.00 107.00 440.00 622.00 771.00 706.00 402.50 157.00 0.00 0.00 3228.50
2008 0.00 0.00 0.00 39.50 206.50 554.00 726.00 639.00 366.50 95.00 36.00 0.00 2662.50
2009 0.00 0.00 10.00 46.50 274.00 527.50 568.00 553.50 397.00 7.50 10.00 0.00 2394.00
2010 0.00 0.00 13.50 154.50 312.50 578.50 742.00 769.50 330.00 139.50 8.50 0.00 3048.50
2011 0.00 0.00 a 0.00 20.00 289.50 540.00 c 862.32 a 637.00 291.50 180.50 0.00 0.00 2820.82
2012 0.00 a 0.00 a 124.50 121.00 400.50 659.50 908.00 658.00 356.50 62.00 4.00 0.00 3294.00
2013 0.00 0.00 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 0.00
Period of Record Statistics
MEAN 0.02 0.01 9.78 80.13 295.98 559.20 733.09 656.23 369.37 112.89 5.34 0.06 2837.34
S.D. 0.23 0.11 17.51 50.74 97.22 91.05 88.17 86.92 88.81 60.08 8.35 0.66 290.67
SKEW 10.58 8.34 3.39 0.67 0.60 0.26 0.06 0.28 0.21 0.79 2.49 10.44 -0.09
MAX 2.50 1.00 124.50 227.00 618.50 786.50 1025.50 914.50 584.50 329.50 48.50 7.00 3555.90
MIN 0.00 0.00 0.00 0.50 115.00 381.00 472.00 445.00 175.50 7.50 0.00 0.00 2133.50
NO YRS 115 112 112 113 112 112 113 112 114 114 111 112 96