HEALDSBURG, CALIFORNIA

Monthly Total Growing Degree Days

(043875)

Base Temperature = 50 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201208
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 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
1894 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
1895 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
1896 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
1897 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
1898 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
1899 0.00 z 0.00 z 115.00 241.55 a 269.00 509.00 525.97 a 462.50 196.50 q 252.77 e 155.00 21.50 2552.29
1900 11.50 g 76.50 193.00 179.50 396.00 498.00 575.00 521.50 421.50 278.50 162.50 13.00 3315.00
1901 21.00 110.50 201.50 156.00 325.50 544.50 505.50 474.00 376.50 415.50 147.50 51.50 3329.50
1902 9.50 87.50 86.00 158.00 250.00 494.50 577.50 528.03 a 499.50 278.50 74.50 35.00 3078.53
1903 15.50 25.00 60.50 148.00 433.50 599.50 554.50 0.00 z 558.62 a 462.00 155.00 c 32.19 e 3044.31
1904 9.30 a 27.50 80.50 214.00 0.00 z 593.57 b 578.48 c 578.48 c 540.00 b 406.44 d 161.38 a 20.00 3209.66
1905 49.50 108.89 a 213.90 a 267.50 321.37 a 467.78 c 672.18 a 619.00 246.50 p 305.00 g 79.00 k 19.24 b 2739.36
1906 38.23 a 122.37 a 0.00 z 268.80 e 318.55 b 506.38 a 746.30 d 625.68 a 605.00 505.00 202.00 39.30 c 3977.62
1907 21.50 171.00 60.97 a 313.89 c 374.58 a 475.56 c 600.37 a 561.88 c 443.08 d 391.93 c 157.50 h 45.93 d 3460.67
1908 29.21 e 26.68 d 256.04 d 226.00 j 222.50 i 402.50 f 269.50 s 219.00 p 417.50 h 222.50 l 52.50 j 4.81 b 316.74
1909 45.00 f 25.00 60.00 288.00 344.50 596.00 625.50 528.50 485.00 338.00 118.50 11.50 3420.50
1910 1.00 29.00 189.50 295.50 483.60 a 488.00 564.00 510.39 c 436.03 a 361.00 0.00 z 53.70 c 3411.72
1911 10.50 13.50 105.00 103.93 b 259.50 441.50 598.50 523.50 420.54 b 331.50 130.71 b 27.50 2966.18
1912 49.71 b 84.50 43.50 h 150.00 d 478.71 e 540.00 508.29 b 568.00 477.41 a 246.00 79.00 14.90 e 3196.53
1913 7.50 m 76.22 a 107.43 b 205.34 a 439.88 b 501.11 c 680.34 c 693.00 620.50 444.33 a 126.72 a 10.50 3905.39
1914 53.00 146.50 289.00 277.00 345.50 455.00 417.00 g 520.59 b 447.41 a 319.50 28.50 q 6.50 2860.00
1915 2.50 n 23.33 a 137.71 e 251.50 284.54 c 0.00 z 622.00 667.50 468.50 406.50 105.50 20.00 2987.08
1916 6.50 113.93 a 196.69 b 313.89 c 343.07 a 470.00 664.50 620.00 b 536.79 b 144.00 h 41.00 8.50 3314.86
1917 0.00 47.00 82.00 219.11 b 280.00 562.78 c 639.00 521.50 584.48 a 456.45 b 133.39 b 15.00 p 3525.71
1918 27.50 26.00 106.36 b 232.00 287.00 535.18 b 555.00 545.50 429.11 b 411.78 a 81.21 a 5.74 d 3242.38
1919 1.50 p 8.40 c 75.12 e 222.86 b 153.50 t 340.00 h 520.50 552.12 b 490.86 a 0.00 z 95.00 7.50 1972.36
1920 36.17 a 48.00 45.00 190.34 a 336.87 a 493.00 519.77 a 568.00 452.50 248.00 a 87.50 6.20 a 3031.34
1921 13.95 a 50.50 129.50 173.00 j 255.00 553.39 b 568.85 a 509.50 475.50 380.00 164.00 52.70 a 3152.89
1922 4.00 8.81 a 45.00 150.00 377.00 478.00 552.00 572.50 569.50 264.00 39.83 a 13.50 3074.14
1923 3.50 84.50 206.00 220.00 385.00 423.46 d 557.48 a 601.50 528.00 361.00 217.76 a 11.00 3599.20
1924 16.00 149.00 129.50 270.00 407.00 476.00 512.53 a 526.00 507.41 a 279.00 a 102.50 18.08 a 3393.03
1925 45.50 75.50 126.14 b 188.50 338.93 a 518.00 559.00 511.50 418.50 347.50 72.00 49.50 3250.57
1926 9.00 127.50 248.50 302.00 468.00 539.48 a 654.00 620.52 a 460.71 b 406.00 247.76 a 86.50 4169.97
1927 43.50 77.00 127.50 238.50 360.00 531.00 0.00 z 586.50 519.00 433.50 163.00 51.50 3131.00
1928 21.00 0.00 z 201.50 214.00 419.00 576.50 592.50 621.00 544.00 356.00 99.50 17.05 a 3662.05
1929 8.50 43.50 102.30 a 117.50 358.50 516.00 613.00 578.50 468.50 387.50 152.50 110.50 3456.80
1930 3.00 149.50 187.50 248.50 302.00 502.00 555.50 607.50 436.00 392.50 133.00 26.50 3543.50
1931 33.50 80.50 130.50 221.50 495.50 541.00 704.00 592.50 477.00 316.50 121.00 11.00 3724.50
1932 20.00 83.00 234.50 195.50 384.00 494.00 592.50 560.00 545.50 397.50 235.50 9.00 3751.00
1933 6.00 7.00 128.00 199.50 216.50 392.50 562.00 562.00 436.00 404.50 165.00 14.00 3093.00
1934 68.50 96.50 322.50 321.00 405.50 489.50 579.50 616.50 588.00 364.00 147.00 43.50 4042.00
1935 21.50 45.50 64.50 211.50 374.00 606.11 c 586.00 586.50 485.00 343.00 58.50 20.00 3402.11
1936 57.00 53.00 195.50 247.50 441.00 540.00 648.00 650.00 582.50 401.50 128.50 24.00 3968.50
1937 0.00 17.50 142.00 181.50 474.00 538.00 662.50 674.00 571.50 465.00 155.50 73.50 3955.00
1938 35.50 59.50 77.50 203.00 407.50 535.00 631.50 595.50 573.00 333.50 51.50 55.00 3558.00
1939 12.50 41.50 110.00 327.50 399.50 557.00 627.00 587.00 598.00 402.50 108.00 43.00 3813.50
1940 57.00 88.50 184.00 259.50 364.00 476.50 544.00 548.00 541.00 406.50 87.50 89.50 3646.00
1941 39.00 77.50 242.00 209.00 405.50 523.00 621.50 629.50 579.00 389.00 166.50 40.00 3921.50
1942 32.50 46.50 106.50 173.00 307.00 519.00 595.50 576.00 480.50 367.50 113.00 41.50 3358.50
1943 32.00 79.00 152.00 242.00 446.18 c 444.00 581.50 575.05 a 565.00 356.50 169.00 39.00 3681.23
1944 10.50 35.00 189.50 119.00 343.00 431.00 489.50 565.00 0.00 z 383.50 54.50 31.00 2651.50
1945 24.50 100.00 62.00 299.00 280.00 554.50 616.50 552.50 512.59 a 357.50 95.50 o 0.00 z 3359.09
1946 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 487.00 617.93 a 0.00 z 381.00 i 309.47 b 0.00 z 0.00 z 1414.40
1947 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
1948 46.50 51.00 43.50 117.00 293.50 479.00 564.50 576.50 499.00 387.50 120.50 6.50 3185.00
1949 1.50 29.50 101.00 301.00 367.50 527.50 545.50 544.00 538.50 307.00 227.50 17.00 3507.50
1950 30.50 69.00 79.50 270.00 375.00 455.50 574.00 645.00 537.00 382.50 259.50 79.50 3757.00
1951 16.50 f 66.00 162.50 164.00 388.00 429.00 546.00 535.50 497.50 373.00 127.50 19.50 3308.50
1952 11.00 62.50 102.50 224.00 440.00 399.50 596.00 582.50 568.00 368.50 96.50 24.50 3475.50
1953 75.50 77.50 111.50 145.00 279.00 457.00 628.00 551.50 566.00 350.00 138.00 36.50 3415.50
1954 13.50 63.50 43.00 264.50 405.50 533.50 634.50 518.50 486.00 327.00 106.50 18.50 3414.50
1955 3.00 33.50 127.00 86.00 416.00 467.50 585.50 546.00 514.00 366.50 155.50 66.17 e 3366.67
1956 25.00 26.00 111.50 195.00 368.00 561.50 552.00 569.50 515.50 318.00 155.50 22.50 3420.00
1957 4.50 91.00 123.00 254.50 342.00 646.50 626.00 581.00 522.00 315.00 79.00 20.00 3604.50
1958 23.00 124.50 40.50 279.50 418.00 571.50 623.00 713.00 708.50 476.50 238.50 134.00 4350.50
1959 54.50 66.50 265.50 346.00 414.50 665.50 703.00 638.50 565.00 530.50 182.00 32.50 4464.00
1960 28.50 59.50 171.00 243.00 403.00 642.50 657.00 612.00 540.50 378.00 102.00 27.50 3864.50
1961 31.00 110.50 102.00 283.50 302.50 630.00 730.50 673.00 546.00 414.00 127.00 25.50 3975.50
1962 64.50 36.50 72.50 369.50 367.50 538.00 585.00 663.50 525.50 360.00 206.00 54.50 3843.00
1963 11.00 226.00 101.50 116.50 354.50 516.50 606.00 673.50 653.50 416.00 129.50 9.00 3813.50
1964 13.00 64.00 126.50 249.50 317.50 521.00 669.50 678.00 587.00 496.00 93.50 93.50 3909.00
1965 15.00 64.00 143.00 244.50 388.00 423.00 596.00 676.00 472.00 519.50 192.00 1.00 3734.00
1966 46.00 34.50 165.00 352.00 404.50 615.00 609.00 670.00 592.50 461.00 165.00 43.50 4158.00
1967 58.00 72.00 92.50 24.00 420.00 466.50 688.50 696.00 672.00 515.00 260.50 63.50 4028.50
1968 35.00 189.50 201.00 322.50 399.00 632.00 672.50 652.50 634.00 422.00 138.00 14.00 4312.00
1969 15.50 21.00 157.00 223.50 490.00 513.50 671.00 756.50 620.00 404.50 193.50 86.50 4152.50
1970 87.50 121.50 238.00 216.50 523.50 0.00 z 652.50 642.50 629.50 339.00 194.00 29.50 3674.00
1971 50.50 78.50 128.50 191.00 353.00 542.00 681.00 732.50 631.00 341.00 129.50 2.00 3860.50
1972 8.00 116.50 279.50 256.50 436.00 570.00 700.50 672.50 520.50 367.50 77.50 29.00 4034.00
1973 36.00 102.00 94.50 336.00 494.50 685.50 683.00 579.50 565.00 406.00 117.00 43.00 4142.00
1974 64.00 46.50 144.50 254.00 415.00 559.50 685.50 657.50 611.50 454.50 131.50 25.00 4049.00
1975 12.00 55.50 113.50 137.50 479.50 530.50 626.50 619.50 555.00 341.00 100.00 55.50 3626.00
1976 45.50 57.50 119.00 204.50 489.50 636.50 692.50 622.50 566.00 469.00 246.00 28.00 4176.50
1977 21.00 132.00 125.50 362.50 305.50 608.50 686.00 693.50 549.00 432.50 221.50 88.50 4226.00
1978 65.00 107.50 285.00 216.00 559.00 583.00 687.50 695.50 651.50 528.00 133.00 23.50 4534.50
1979 22.50 56.00 190.50 276.72 a 510.50 620.00 735.00 680.50 725.50 457.00 128.00 67.00 4469.22
1980 64.00 158.50 182.00 305.00 406.00 509.50 665.50 590.00 557.50 474.00 214.50 52.00 4178.50
1981 52.50 135.00 186.50 308.50 521.00 785.50 667.00 710.50 600.50 357.50 210.00 85.50 4620.00
1982 5.00 121.00 104.00 242.00 467.00 470.00 660.00 697.50 618.50 433.00 91.00 33.50 3942.50
1983 30.00 99.50 131.50 188.00 437.00 601.00 721.50 717.00 672.00 508.00 141.00 76.00 4322.50
1984 76.50 65.00 289.00 271.50 595.00 625.50 785.00 745.50 775.00 375.00 89.50 27.00 4719.50
1985 0.00 148.50 99.00 354.00 355.00 608.00 658.00 567.50 449.50 377.50 123.50 28.50 3769.00
1986 79.00 153.00 252.00 257.00 411.00 563.00 594.50 560.50 380.50 401.50 211.00 26.50 3889.50
1987 28.50 100.50 141.50 352.50 498.00 525.00 556.50 565.50 540.00 491.50 146.50 60.50 4006.50
1988 33.00 152.00 249.00 255.50 377.00 526.50 724.50 590.00 517.50 399.00 143.50 63.50 4031.00
1989 16.00 41.50 155.50 342.00 398.50 514.50 658.50 583.00 473.00 349.00 172.00 30.50 3734.00
1990 27.00 53.50 160.50 344.50 363.00 563.50 612.50 639.50 596.50 470.00 161.00 16.50 4008.00
1991 53.50 165.00 59.00 213.50 327.00 457.00 583.00 571.50 556.00 494.00 212.50 22.00 3714.00
1992 9.50 147.00 191.50 350.50 518.00 475.50 614.00 659.00 582.50 447.50 156.00 12.00 4163.00
1993 19.50 42.50 240.00 266.00 453.00 651.50 692.50 688.00 536.50 408.00 101.00 29.50 4128.00
1994 19.00 32.00 209.50 290.50 452.00 604.00 618.50 679.50 544.50 347.00 15.50 7.00 3819.00
1995 95.00 128.00 121.50 224.00 382.00 541.50 726.00 675.00 555.00 404.50 235.00 91.50 4179.00
1996 43.50 146.50 190.50 326.00 476.50 630.50 738.50 686.00 501.50 381.00 164.00 93.00 4377.50
1997 90.00 106.00 245.50 324.50 596.50 606.50 703.50 659.00 591.00 341.00 165.00 36.50 4465.00
1998 74.00 43.50 151.50 212.50 296.50 532.50 685.50 712.00 539.00 325.00 86.50 9.50 3668.00
1999 0.00 z 36.50 59.00 253.45 a 410.50 567.00 651.50 579.18 a 512.68 b 394.45 b 183.62 a 34.50 3682.38
2000 61.50 101.50 179.50 329.48 a 510.35 d 639.44 c 663.40 a 0.00 z 551.50 322.00 71.79 b 30.48 a 3460.95
2001 1.50 38.00 222.50 218.00 662.50 716.90 a 697.50 a 710.00 531.21 a 457.50 159.31 a 39.00 4453.91
2002 26.00 78.00 116.00 292.50 473.50 676.50 730.50 677.50 566.50 349.50 173.00 34.50 4194.00
2003 98.00 58.50 187.50 154.50 488.50 634.00 768.00 711.50 611.50 0.00 z 70.50 40.00 3822.50
2004 21.00 40.00 331.00 353.00 519.50 663.00 699.50 743.50 628.00 346.00 105.00 42.50 4492.00
2005 3.50 99.50 199.00 263.00 464.00 561.00 780.00 670.00 497.00 394.73 a 184.50 90.42 a 4206.65
2006 53.50 77.50 30.00 251.00 471.50 679.50 818.29 b 627.23 a 563.00 322.50 167.00 27.50 4088.53
2007 5.00 56.50 249.50 323.00 476.00 637.50 718.50 727.50 535.50 295.50 163.00 23.50 4211.00
2008 4.50 48.87 b 133.00 264.50 501.50 688.00 707.00 752.50 556.00 436.50 186.50 4.00 4282.87
2009 29.50 47.00 160.00 283.00 488.50 576.72 a 672.70 a 701.50 651.50 359.00 121.00 19.50 4109.92
2010 15.50 70.00 0.00 z 187.50 315.00 611.38 a 583.00 572.00 569.00 373.00 158.00 59.00 3513.38
2011 0.00 z 33.25 d 94.15 d 141.00 i 349.35 e 385.50 g 576.37 d 478.50 f 587.88 d 385.12 e 64.44 c 25.26 d 2115.82
2012 29.89 c 81.63 b 49.94 d 246.72 a 436.67 b 535.00 632.50 608.50 0.00 z 0.00 z 0.00 z 0.00 z 2620.86
Period of Record Statistics
MEAN 30.86 77.19 148.97 242.47 401.85 546.46 631.95 615.93 542.69 386.93 141.21 36.55 3862.10
S.D. 24.16 44.30 68.87 68.57 82.14 73.83 67.96 68.01 71.21 63.55 52.74 26.76 411.87
SKEW 0.83 0.75 0.48 -0.37 0.30 0.42 0.23 0.11 0.28 0.16 0.16 1.16 -0.21
MAX 98.00 226.00 331.00 369.50 662.50 785.50 818.29 756.50 775.00 530.50 260.50 134.00 4719.50
MIN 0.00 7.00 30.00 24.00 216.50 392.50 489.50 462.50 376.50 246.00 15.50 1.00 2966.18
NO YRS 103 110 109 109 109 108 110 108 107 107 105 109 82