NORTHWOOD, IOWA

Monthly Total Growing Degree Days

(136103)

Base Temperature = 50 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1896 0.00 z 0.00 z 0.00 z 178.00 394.00 517.50 599.50 545.17 b 193.00 58.00 0.00 0.00 2485.17
1897 0.00 0.00 0.00 53.50 195.00 467.00 706.50 467.00 503.00 166.50 1.50 0.00 2560.00
1898 0.00 0.00 0.00 25.00 c 245.00 548.50 646.50 591.00 366.00 60.50 0.00 0.00 d 2482.50
1899 0.00 0.00 0.00 104.50 229.00 529.50 651.50 698.00 309.00 170.50 3.00 0.00 2695.00
1900 0.00 0.00 0.00 153.50 395.00 544.50 629.50 784.00 338.00 223.00 2.00 0.00 3069.50
1901 0.00 d 0.00 0.00 112.00 301.00 568.00 921.00 678.00 336.00 139.00 1.00 0.00 c 3056.00
1902 0.00 0.00 4.00 33.50 350.50 389.50 628.50 504.50 225.50 77.00 11.50 0.00 2224.50
1903 0.00 0.00 5.00 33.00 332.00 401.00 602.00 495.50 262.50 69.50 15.50 0.00 2216.00
1904 0.00 0.00 0.00 z 41.00 249.00 444.00 593.50 486.00 364.50 49.00 o 2.00 0.00 2180.00
1905 0.00 0.00 z 12.00 40.00 213.50 519.00 598.00 693.50 399.00 111.50 0.00 0.00 2586.50
1906 0.00 b 0.00 0.00 98.00 288.00 470.00 586.00 717.02 d 329.50 g 66.50 8.50 0.00 a 2234.02
1907 0.00 0.00 24.80 a 2.00 109.00 413.04 b 688.64 c 579.18 a 332.40 e 70.50 0.00 b 0.00 a 2219.56
1908 0.00 z 0.00 a 0.00 b 90.00 288.00 447.93 a 659.94 e 531.65 a 527.50 111.50 1.15 d 0.00 j 2657.68
1909 0.00 0.00 0.00 f 2.31 d 215.00 f 498.50 444.50 i 250.50 u 323.08 d 108.00 9.00 0.00 940.88
1910 0.00 d 0.00 82.00 151.67 c 128.98 c 616.80 e 574.50 f 607.00 312.50 156.50 0.00 0.00 2055.45
1911 0.00 e 0.00 i 0.00 g 0.00 z 412.50 0.00 z 0.00 z 537.00 336.43 b 56.46 c 0.00 0.00 1342.39
1912 0.00 0.00 c 0.00 57.50 274.00 384.00 657.00 538.50 312.50 64.38 e 0.00 0.00 2287.88
1913 0.00 0.00 0.00 80.00 188.07 a 586.50 633.90 b 688.00 373.50 107.00 7.50 0.00 2664.46
1914 0.00 a 0.00 0.00 73.00 272.50 539.44 c 738.50 641.81 d 330.00 178.00 10.50 0.00 2783.76
1915 0.00 0.00 0.00 223.00 145.00 369.00 529.00 434.50 320.50 87.50 10.50 0.00 2119.00
1916 0.00 0.00 0.00 30.00 240.00 373.50 843.50 660.50 328.89 c 52.50 j 0.00 e 0.00 b 2476.39
1917 0.00 0.00 0.00 32.00 121.50 f 0.00 z 531.50 h 485.31 b 264.00 15.00 f 0.50 i 0.00 h 781.31
1918 0.00 0.00 6.50 5.17 a 368.50 0.00 z 0.00 z 0.00 z 177.00 103.85 a 10.50 0.00 l 671.52
1919 0.00 0.00 0.00 b 20.00 0.00 z 528.33 c 504.50 g 300.50 j 314.50 0.00 z 0.00 z 0.00 b 862.83
1920 0.00 k 0.00 c 8.50 10.00 234.00 544.00 634.31 e 513.50 399.50 210.00 0.00 c 0.00 2553.81
1921 0.00 0.00 16.53 a 109.00 385.43 a 671.40 e 839.67 b 480.00 g 409.82 b 82.87 e 0.00 d 0.00 d 2514.73
1922 0.00 0.00 b 0.00 10.56 c 360.63 a 597.50 601.40 a 691.00 424.50 197.33 e 0.00 c 0.00 2882.92
1923 0.00 0.00 b 0.00 53.00 275.26 b 612.22 c 796.70 a 434.00 f 334.50 63.79 e 0.00 c 0.00 f 2135.47
1924 0.00 t 0.00 n 0.00 m 14.00 i 51.31 b 396.67 c 545.00 528.79 e 158.00 h 149.12 b 3.00 i 0.00 c 1670.89
1925 0.00 a 0.00 r 1.50 i 93.00 n 201.00 i 347.50 i 511.00 f 462.50 h 453.50 12.29 b 0.00 0.00 m 465.79
1926 0.00 l 0.00 g 0.00 j 60.00 274.00 h 408.00 e 664.43 a 626.31 d 305.00 74.83 b 0.00 0.00 2138.58
1927 0.00 0.00 b 0.50 2.50 z 0.00 z 316.00 i 614.46 c 485.67 d 446.25 b 53.50 g 0.00 z 0.00 z 1546.88
1928 0.00 z 0.00 z 14.47 a 40.00 337.00 380.00 671.50 585.00 271.50 133.00 3.50 0.00 2435.97
1929 0.00 a 0.00 0.00 58.00 212.00 214.00 q 689.75 a 611.00 316.00 74.92 a 0.00 0.00 1961.67
1930 0.00 1.50 0.00 j 99.50 267.50 505.50 761.50 710.50 372.00 146.50 24.50 0.00 2889.00
1931 0.00 0.00 0.00 123.50 234.00 691.50 797.50 672.50 557.00 176.50 15.00 b 0.00 3267.50
1932 0.00 0.00 0.00 45.50 306.50 600.50 709.00 640.50 278.50 80.50 0.00 0.00 2661.00
1933 0.00 0.00 2.00 57.50 281.00 751.50 755.00 569.00 492.00 62.50 16.50 0.00 2987.00
1934 0.00 0.00 0.00 68.00 561.00 708.50 785.50 575.50 242.50 169.47 a 9.50 0.00 3119.97
1935 0.00 0.00 13.50 47.50 154.50 390.50 814.00 620.52 a 389.50 89.00 0.00 0.00 2519.02
1936 0.00 0.00 3.50 25.50 423.50 471.00 919.50 752.50 429.50 74.50 0.00 0.00 3099.50
1937 0.00 0.00 0.00 40.00 271.00 457.00 725.00 773.50 385.50 94.50 0.50 0.00 2747.00
1938 0.00 0.00 14.98 a 99.50 223.00 474.50 716.10 a 672.50 423.50 226.00 29.50 0.00 a 2879.58
1939 0.00 0.00 28.00 81.00 413.50 553.00 730.00 588.00 473.00 103.50 4.00 0.00 2974.00
1940 0.00 0.00 0.00 27.00 221.00 545.50 754.50 536.50 412.00 150.00 5.50 0.00 2652.00
1941 0.00 0.00 0.00 133.50 413.00 531.00 691.50 663.00 401.00 122.00 15.00 0.00 2970.00
1942 0.00 0.00 6.50 154.50 234.50 480.00 621.50 579.50 315.50 158.50 13.00 0.00 2563.50
1943 0.00 0.00 21.00 29.00 183.00 563.50 693.50 619.00 207.50 111.00 0.00 0.00 2427.50
1944 1.00 0.00 0.00 14.00 430.50 574.00 593.50 613.00 340.50 91.50 28.00 0.00 2686.00
1945 0.00 0.00 46.50 38.00 147.50 351.50 573.00 588.50 316.00 88.00 2.00 0.00 2151.00
1946 0.00 0.00 34.50 128.00 154.00 519.50 653.50 503.00 294.00 145.50 0.00 0.00 2432.00
1947 0.00 0.00 0.00 34.50 125.50 390.00 562.00 824.50 449.00 288.00 4.00 0.00 2677.50
1948 0.00 z 0.00 z 0.00 z 88.80 e 208.50 446.50 695.50 670.00 472.50 65.50 5.00 g 0.00 2647.30
1949 0.00 j 0.00 0.00 a 77.00 367.50 631.50 763.00 685.00 253.00 194.00 10.86 a 0.00 2981.86
1950 0.00 0.00 0.00 15.50 215.97 a 492.50 557.50 498.58 a 318.50 83.50 n 7.50 0.00 b 2106.05
1951 0.00 d 0.00 0.00 51.21 a 362.46 e 231.50 m 0.00 z 0.00 z 259.50 152.86 b 3.50 0.00 a 829.53
1952 0.00 0.00 0.00 120.50 230.43 a 635.00 658.50 463.00 291.11 c 38.75 e 1.00 k 0.00 c 2437.29
1953 0.00 d 0.00 l 4.17 e 6.50 h 140.50 i 634.04 d 480.00 i 638.50 85.50 v 164.00 j 8.50 n 0.00 i 1276.71
1954 0.00 g 0.00 a 0.00 z 109.14 a 187.55 a 454.50 f 376.50 p 613.00 389.46 b 93.50 3.50 k 0.00 z 1392.65
1955 0.00 a 0.00 e 0.00 c 137.59 a 377.17 a 467.59 a 847.91 d 809.50 430.86 a 145.18 a 0.00 a 0.00 e 3215.79
1956 0.00 b 0.00 z 0.00 c 22.78 c 270.00 f 712.20 e 595.56 e 633.43 a 292.00 202.50 13.97 a 0.00 2472.43
1957 0.00 a 0.00 c 0.00 d 144.00 248.50 523.97 a 828.50 645.50 289.50 77.00 0.00 0.00 2756.97
1958 0.00 0.00 0.00 74.00 336.00 417.50 608.00 679.00 395.50 188.00 4.50 0.00 2702.50
1959 0.00 0.00 a 0.00 53.00 368.68 c 600.50 667.50 786.50 373.50 20.00 0.00 0.00 2869.68
1960 0.00 0.00 0.00 110.00 300.00 492.50 672.50 684.00 399.00 123.00 1.00 0.00 2782.00
1961 0.00 0.00 0.00 13.00 224.00 581.50 644.50 455.50 j 342.50 146.50 0.00 0.00 1952.00
1962 0.00 0.00 0.00 92.00 425.00 558.50 621.00 623.00 261.50 172.50 0.00 4.00 2757.50
1963 0.00 0.00 a 34.50 92.00 285.00 656.00 701.00 597.00 413.50 354.00 4.50 0.00 3137.50
1964 0.00 0.00 0.00 67.00 439.00 590.00 809.50 597.00 334.00 90.50 29.00 0.00 2956.00
1965 0.00 0.00 0.00 38.00 378.00 553.00 674.50 598.00 207.50 132.00 9.00 0.00 2590.00
1966 0.00 0.00 14.00 20.00 231.50 570.50 776.00 563.00 335.00 105.50 3.50 0.00 2619.00
1967 0.00 0.00 22.00 61.50 198.50 538.00 606.50 515.00 315.00 113.50 1.00 0.00 2371.00
1968 0.00 0.00 44.50 89.00 153.50 564.00 645.00 633.00 332.50 148.50 2.50 0.00 2612.50
1969 0.00 0.00 0.00 49.00 324.50 347.50 708.00 682.50 370.50 96.50 1.00 0.00 2579.50
1970 0.00 0.00 0.00 112.00 357.00 602.50 712.50 651.00 350.00 106.50 0.00 0.00 2891.50
1971 0.00 0.00 3.00 84.50 218.50 703.00 602.00 617.50 315.50 i 186.52 a 3.00 0.00 2418.02
1972 0.00 0.00 0.00 25.50 366.50 528.50 639.50 652.00 343.50 81.50 0.00 0.00 2637.00
1973 0.00 0.00 z 4.50 46.00 220.50 630.00 726.50 701.50 353.00 228.00 3.00 0.00 2913.00
1974 0.00 0.00 0.00 103.50 227.00 507.50 834.50 565.00 273.50 123.50 5.00 0.00 2639.50
1975 0.00 0.00 0.00 a 17.50 397.50 575.00 764.00 712.50 274.50 192.50 33.50 0.00 2967.00
1976 0.00 0.00 3.50 112.00 281.50 612.50 777.00 670.50 364.00 111.00 0.00 0.00 2932.00
1977 0.00 0.00 15.00 250.00 570.00 632.50 805.50 558.00 400.50 27.00 13.00 0.00 3271.50
1978 0.00 0.00 20.50 28.50 345.50 590.50 681.00 669.50 506.00 78.50 23.50 0.00 2943.50
1979 0.00 0.00 0.00 40.00 278.50 559.50 689.00 620.00 398.00 84.50 1.00 0.00 2670.50
1980 0.00 0.00 0.00 125.00 384.00 605.00 768.50 671.50 420.50 69.00 8.00 0.00 3051.50
1981 0.00 3.00 19.50 135.00 258.50 584.50 728.00 616.50 320.50 37.50 12.00 0.00 2715.00
1982 0.00 0.00 0.00 32.00 362.50 422.00 743.00 611.50 335.50 91.00 0.00 4.00 2601.50
1983 0.00 0.00 6.00 30.50 157.00 578.00 813.50 794.00 393.00 94.60 b 15.50 0.00 2882.10
1984 0.00 0.00 0.00 28.50 265.50 608.00 664.50 742.50 352.00 169.50 0.00 0.00 2830.50
1985 0.00 0.00 2.00 217.00 462.00 494.00 702.00 560.50 387.00 62.50 0.00 0.00 2887.00
1986 0.00 0.00 51.00 109.00 342.50 653.50 778.50 542.00 391.00 94.50 0.00 0.00 2962.00
1987 0.00 0.00 15.00 199.50 501.50 717.50 831.83 a 554.50 334.00 26.00 20.00 0.00 3199.83
1988 0.00 0.00 0.00 64.50 472.00 744.50 790.50 775.50 433.50 48.50 0.00 0.00 3329.00
1989 0.00 0.00 15.00 65.00 275.00 496.00 729.50 607.50 291.00 141.50 0.00 0.00 2620.50
1990 0.00 0.00 18.00 111.50 175.00 555.00 621.50 608.50 419.50 65.50 17.00 0.00 2591.50
1991 0.00 0.00 8.50 87.50 388.00 664.00 653.50 600.00 297.00 66.00 0.00 0.00 2764.50
1992 0.00 0.00 0.00 22.00 289.50 451.50 454.50 436.50 247.00 101.00 0.00 0.00 2002.00
1993 0.00 0.00 0.00 18.00 189.00 434.50 594.00 578.50 157.00 71.50 0.00 0.00 2042.50
1994 0.00 0.00 2.50 94.66 a 309.50 219.00 p 378.50 i 494.50 391.50 99.50 4.50 0.00 1396.66
1995 0.00 0.00 1.50 1.50 162.00 585.00 672.00 730.00 273.00 84.00 0.00 0.00 2509.00
1996 0.00 0.00 0.00 22.00 154.00 509.00 582.50 534.00 264.50 103.50 0.00 0.00 z 2169.50
1997 0.00 0.00 3.00 9.50 89.50 534.50 595.20 a 474.00 301.50 152.00 0.00 0.00 2159.20
1998 0.00 0.00 13.00 60.00 404.50 415.34 a 606.00 0.00 z 425.00 47.50 0.00 0.00 1971.34
1999 0.00 d 0.00 a 4.81 b 11.90 a 283.02 d 475.71 b 712.45 c 531.00 262.00 62.00 23.00 0.00 2365.89
2000 0.00 0.00 a 24.50 49.50 290.37 a 442.50 607.60 a 566.50 321.72 a 138.97 b 6.96 b 0.00 2448.62
2001 0.00 0.00 a 0.00 104.48 a 261.00 489.00 656.00 603.50 232.50 53.00 47.00 4.00 2450.48
2002 0.00 0.00 0.00 88.50 185.50 568.50 738.50 547.50 382.00 58.50 0.00 0.00 2569.00
2003 0.00 0.00 17.00 90.00 191.00 451.50 620.00 635.50 309.00 124.50 0.00 0.00 2438.50
2004 0.00 0.00 19.00 71.00 233.50 426.00 562.00 381.50 397.50 85.50 9.50 0.00 2185.50
2005 0.00 0.00 q 6.50 121.00 195.50 617.50 668.50 543.50 421.50 151.50 4.00 0.00 2729.50
2006 0.00 0.00 0.00 90.00 288.50 495.50 717.50 580.00 214.00 78.50 6.50 0.00 e 2470.50
2007 0.00 0.00 27.38 a 90.50 363.50 536.00 630.50 586.50 351.00 155.00 0.00 e 0.00 a 2740.38
2008 0.00 d 0.00 l 0.00 f 34.50 165.50 475.50 605.00 500.00 307.00 66.50 38.50 0.00 2192.50
2009 0.00 0.00 0.00 41.00 97.50 k 471.00 e 466.55 a 459.50 353.00 15.00 8.00 0.00 1814.05
2010 0.00 a 0.00 a 9.50 106.00 284.50 234.00 p 686.50 693.00 284.50 122.00 3.00 0.00 2189.00
2011 0.00 d 0.00 0.00 34.29 b 223.72 a 515.56 c 777.50 607.50 261.67 c 163.50 j 0.00 u 0.00 2420.22
2012 0.00 0.00 132.50 59.50 385.36 b 552.32 b 799.05 b 436.50 g 307.00 66.00 7.78 c 0.00 2309.51
2013 0.00 0.00 e 0.00 a 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 0.01 0.04 8.47 71.38 283.66 531.28 685.99 608.47 343.95 112.32 6.20 0.11 2690.59
S.D. 0.10 0.33 17.86 50.32 100.77 91.97 89.90 89.12 75.66 57.23 9.20 0.66 309.87
SKEW 10.30 8.07 4.19 1.04 0.36 0.14 0.21 0.13 0.17 1.10 2.06 5.75 -0.12
MAX 1.00 3.00 132.50 250.00 570.00 751.50 921.00 824.50 557.00 354.00 47.00 4.00 3329.00
MIN 0.00 0.00 0.00 1.50 51.31 347.50 454.50 381.50 157.00 12.29 0.00 0.00 2002.00
NO YRS 109 105 107 112 108 107 106 107 113 109 108 108 75