HEALDSBURG, CALIFORNIA

Monthly Total Growing Degree Days

(043875)

Base Temperature = 40 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 406.00 538.45 a 578.00 809.00 835.97 a 772.50 326.50 q 554.42 e 454.00 208.00 5156.34
1900 212.50 g 330.00 501.00 479.50 706.00 798.00 885.00 831.50 721.50 584.50 446.50 219.50 6503.00
1901 221.00 314.50 505.50 434.00 633.50 844.50 815.50 784.00 676.50 725.50 443.00 278.00 6675.50
1902 126.00 339.00 369.50 452.50 560.00 794.50 887.50 838.03 a 799.50 588.50 342.50 237.50 6335.03
1903 176.50 169.50 313.50 440.50 743.50 899.50 864.50 0.00 z 858.62 a 772.00 435.56 c 271.85 e 5945.52
1904 249.03 a 238.00 336.00 508.50 0.00 z 893.57 b 888.48 c 888.48 c 840.00 b 716.44 d 458.28 a 248.00 6264.79
1905 285.00 364.52 a 520.80 a 567.50 631.37 a 767.78 c 982.18 a 929.00 386.50 p 545.00 g 250.00 k 238.38 b 5286.53
1906 294.50 a 399.78 a 0.00 z 567.60 e 628.55 b 806.38 a 1056.30 d 935.68 a 905.00 815.00 468.50 281.77 c 7159.06
1907 185.50 448.00 320.85 a 611.11 c 684.58 a 775.56 c 910.37 a 871.88 c 743.08 d 701.93 c 373.00 h 294.50 d 6547.35
1908 246.81 e 261.58 d 532.17 d 426.00 j 441.50 i 642.50 f 389.50 s 369.00 p 637.50 h 412.50 l 229.50 j 150.19 b 1190.74
1909 238.00 f 245.50 321.50 588.00 654.50 896.00 935.50 838.50 785.00 645.00 381.50 171.00 6462.00
1910 104.00 228.00 490.50 595.50 793.60 a 788.00 874.00 820.39 c 736.03 a 671.00 0.00 z 312.21 c 6413.24
1911 234.00 196.00 397.00 379.82 b 568.00 741.50 908.50 833.50 720.54 b 641.50 420.54 b 217.50 6258.39
1912 306.79 b 367.50 253.00 h 443.65 d 788.71 e 840.00 818.29 b 878.00 777.41 a 552.00 367.00 209.85 e 6349.21
1913 79.50 m 309.56 a 382.69 b 504.83 a 749.88 b 801.11 c 990.34 c 1003.00 920.50 754.33 a 416.90 a 187.50 7020.63
1914 304.00 419.00 584.50 577.00 655.50 755.00 657.00 g 830.59 b 747.41 a 629.50 149.00 q 130.50 5633.00
1915 114.50 n 246.81 a 440.56 e 551.50 588.45 c 0.00 z 932.00 977.50 768.50 716.50 372.50 229.50 5823.82
1916 116.50 380.62 a 476.76 b 613.89 c 653.07 a 770.00 974.50 930.00 b 836.79 b 373.00 h 274.50 139.50 6166.12
1917 100.00 273.00 341.00 511.61 b 590.00 862.78 c 949.00 831.50 884.48 a 766.45 b 425.36 b 152.50 p 6535.17
1918 286.00 238.00 391.24 b 529.00 597.00 835.18 b 865.00 855.50 729.11 b 721.78 a 360.00 a 182.56 d 6590.37
1919 58.50 p 210.56 c 358.88 e 522.86 b 263.50 t 560.00 h 830.50 862.12 b 790.86 a 0.00 z 375.50 166.00 4117.28
1920 282.10 a 288.50 333.00 485.17 a 646.87 a 793.00 829.77 a 878.00 752.50 556.97 a 358.00 238.70 a 6442.57
1921 211.32 a 292.50 434.00 367.50 j 563.50 853.39 b 878.85 a 819.50 774.50 690.00 444.50 308.97 a 6271.03
1922 111.50 188.74 a 316.00 447.50 687.00 778.00 862.00 882.50 869.50 574.00 305.17 a 231.50 6253.41
1923 180.00 275.50 511.00 516.00 695.00 723.46 d 867.48 a 911.50 828.00 670.00 512.07 a 215.50 6905.51
1924 204.00 437.50 418.00 570.00 717.00 776.00 822.53 a 836.00 807.41 a 585.90 a 385.00 158.10 a 6717.45
1925 319.00 338.00 406.21 b 485.50 648.93 a 818.00 869.00 821.50 718.50 657.50 364.50 282.50 6729.14
1926 133.50 387.00 553.50 602.00 778.00 839.48 a 964.00 930.52 a 760.71 b 716.00 547.76 a 275.50 7487.97
1927 271.50 348.00 435.00 530.00 670.00 831.00 0.00 z 896.50 819.00 743.50 458.00 276.00 6278.50
1928 225.00 0.00 z 511.50 514.00 729.00 876.50 902.50 931.00 844.00 666.00 383.50 163.78 a 6746.78
1929 133.00 231.00 389.05 a 393.00 668.50 816.00 923.00 888.50 768.50 697.50 442.00 380.00 6730.05
1930 161.50 395.50 472.50 548.50 608.00 802.00 865.50 917.50 736.00 702.50 425.00 230.50 6865.00
1931 263.00 321.00 438.50 517.50 805.50 841.00 1014.00 902.50 777.00 626.50 367.50 170.00 7044.00
1932 214.50 307.00 544.50 495.00 694.00 794.00 902.50 870.00 845.50 707.50 535.50 162.50 7072.50
1933 150.50 204.50 426.00 487.50 519.00 692.50 872.00 872.00 736.00 714.50 459.50 244.00 6378.00
1934 309.50 363.00 632.50 621.00 715.50 789.50 889.50 926.50 888.00 673.50 447.00 310.50 7566.00
1935 219.50 305.00 306.50 509.00 684.00 906.11 c 896.00 896.50 785.00 646.50 320.00 243.00 6717.11
1936 323.00 294.00 496.50 537.00 751.00 840.00 958.00 960.00 882.50 709.00 416.50 239.50 7407.00
1937 52.50 229.50 438.00 481.50 784.00 838.00 972.50 984.00 871.50 775.00 452.50 341.50 7220.50
1938 289.50 281.50 358.00 499.50 717.50 835.00 941.50 905.50 873.00 643.50 309.50 312.50 6966.50
1939 220.50 243.00 396.50 627.50 709.50 857.00 937.00 897.00 898.00 712.00 401.00 306.00 7205.00
1940 253.00 360.00 487.00 559.50 674.00 776.50 854.00 858.00 841.00 716.50 381.50 353.50 7114.50
1941 296.50 344.50 550.50 507.50 715.50 823.00 921.50 939.50 879.00 699.00 448.50 264.00 7389.00
1942 221.00 286.50 399.50 469.50 617.00 819.00 905.50 886.00 780.50 677.50 402.00 279.00 6743.00
1943 262.50 321.50 460.50 542.00 756.18 c 744.00 891.50 885.05 a 865.00 666.50 466.50 293.50 7154.73
1944 221.50 291.00 486.50 415.00 653.00 731.00 799.50 875.00 0.00 z 693.50 335.50 274.00 5775.50
1945 228.50 366.00 305.50 598.00 590.00 854.50 926.50 862.50 812.59 a 667.50 227.50 o 0.00 z 6211.59
1946 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 787.00 927.93 a 0.00 z 591.00 i 613.05 b 0.00 z 0.00 z 2327.99
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 294.50 249.00 319.00 389.00 603.50 779.00 874.50 886.50 799.00 697.50 397.00 143.00 6431.50
1949 54.50 179.50 391.00 601.00 677.50 827.50 855.50 854.00 838.50 617.00 527.50 171.50 6595.00
1950 128.00 297.00 356.00 566.50 682.50 755.50 884.00 955.00 837.00 692.00 556.50 350.00 7060.00
1951 196.50 f 274.50 440.50 462.00 698.00 729.00 856.00 845.50 797.50 683.00 408.00 203.50 6397.50
1952 140.00 286.00 341.50 522.50 750.00 699.50 906.00 892.50 868.00 678.50 337.50 253.00 6675.00
1953 350.00 345.50 396.00 425.00 589.00 757.00 938.00 861.50 866.00 660.00 424.50 293.50 6906.00
1954 219.00 307.00 308.50 563.00 715.50 833.50 944.50 828.50 786.00 637.00 394.00 179.50 6716.00
1955 140.00 255.50 420.00 357.50 726.00 767.50 895.50 856.00 814.00 676.50 404.00 288.54 e 6601.04
1956 253.50 230.50 405.00 487.50 678.00 861.50 862.00 879.50 815.50 625.00 449.50 216.50 6764.00
1957 131.50 313.50 419.50 554.50 652.00 946.50 936.00 891.00 822.00 625.00 369.50 208.50 6869.50
1958 252.50 395.00 325.00 575.50 728.00 871.50 933.00 1023.00 1008.50 786.50 521.00 437.50 7857.00
1959 322.00 297.50 574.00 646.00 724.50 965.50 1013.00 948.50 865.00 840.50 478.00 284.50 7959.00
1960 226.50 334.50 472.00 533.00 713.00 942.50 967.00 922.00 840.50 688.00 374.00 242.50 7255.50
1961 191.50 377.00 394.50 575.50 612.50 930.00 1040.50 983.00 846.00 724.00 408.50 197.00 7280.00
1962 261.00 257.00 362.00 669.50 677.50 838.00 895.00 973.50 825.50 670.00 505.50 268.00 7202.50
1963 164.00 506.00 394.50 404.50 664.50 816.50 916.00 983.50 953.50 726.00 415.00 139.00 7083.00
1964 205.00 341.50 412.50 548.50 627.50 821.00 979.50 988.00 887.00 806.00 355.50 328.50 7300.50
1965 240.00 324.50 453.00 528.00 698.00 723.00 906.00 986.00 772.00 829.50 475.00 135.00 7070.00
1966 266.00 272.00 445.00 652.00 714.50 915.00 919.00 980.00 892.50 771.00 452.00 283.00 7562.00
1967 298.00 336.00 372.00 289.50 730.00 766.50 998.50 1006.00 972.00 825.00 546.00 255.50 7395.00
1968 216.00 469.00 510.50 622.50 709.00 932.00 982.50 962.50 934.00 732.00 425.00 202.50 7697.50
1969 185.00 209.00 443.50 522.00 800.00 813.50 981.00 1066.50 920.00 714.50 490.00 370.50 7515.50
1970 341.50 398.50 540.50 514.00 833.50 0.00 z 962.50 952.50 929.50 649.00 494.00 230.00 6845.50
1971 278.50 326.00 425.50 491.00 663.00 842.00 991.00 1042.50 931.00 649.50 427.00 179.50 7246.50
1972 174.00 372.50 589.50 556.50 746.00 870.00 1010.50 982.50 820.50 677.50 355.00 168.50 7323.00
1973 235.50 375.00 383.00 636.00 804.50 985.50 993.00 889.50 865.00 716.00 392.00 311.50 7586.50
1974 269.50 304.50 440.00 553.00 724.50 859.50 995.50 967.50 911.50 764.50 428.50 265.00 7483.50
1975 224.00 303.50 409.00 419.00 789.50 830.50 936.50 929.50 855.00 651.00 372.00 315.50 7035.00
1976 292.00 324.50 399.50 499.00 799.50 936.50 1002.50 932.50 866.00 779.00 543.50 284.50 7659.00
1977 208.50 402.50 417.00 662.50 615.50 908.50 996.00 1003.50 849.00 742.50 504.50 375.00 7685.00
1978 360.50 378.00 595.00 516.00 869.00 883.00 997.50 1005.50 951.50 838.00 404.50 195.50 7994.00
1979 233.00 303.50 492.50 576.72 a 820.50 920.00 1045.00 990.50 1025.50 767.00 418.00 334.50 7926.72
1980 325.50 448.00 490.50 605.00 716.00 809.50 975.50 900.00 857.50 784.00 513.00 317.50 7742.00
1981 311.50 406.50 494.00 608.50 831.00 1085.50 977.00 1020.50 900.50 667.50 508.50 380.50 8191.50
1982 173.50 380.00 398.00 522.00 777.00 770.00 970.00 1007.50 918.50 743.00 368.00 253.50 7281.00
1983 244.50 377.00 438.00 486.50 747.00 901.00 1031.50 1027.00 972.00 818.00 423.50 346.00 7812.00
1984 320.50 333.00 599.00 571.50 905.00 925.50 1095.00 1055.50 1075.00 685.00 370.00 209.00 8144.00
1985 165.00 392.00 370.50 654.00 665.00 908.00 968.00 877.50 749.50 687.50 347.50 154.00 6938.50
1986 363.50 417.50 558.00 556.50 721.00 863.00 904.50 870.50 680.50 711.50 502.50 258.00 7407.00
1987 256.00 366.50 434.50 652.50 808.00 825.00 866.50 875.50 840.00 801.50 436.50 273.00 7435.50
1988 273.00 422.50 559.00 555.50 685.50 825.50 1034.50 900.00 817.50 709.00 429.50 273.50 7485.00
1989 202.50 227.50 453.00 640.00 708.50 814.50 968.50 893.00 773.00 659.00 462.50 213.00 7015.00
1990 262.50 245.00 457.00 644.50 673.00 863.50 922.50 949.50 896.50 780.00 444.00 168.50 7306.50
1991 276.50 441.00 332.50 513.00 637.00 757.00 893.00 881.50 856.00 804.00 509.00 256.50 7157.00
1992 199.00 434.50 501.50 650.50 828.00 775.50 924.00 969.00 882.50 757.50 444.00 193.50 7559.50
1993 203.50 271.50 549.50 566.00 763.00 951.50 1002.50 998.00 836.50 718.00 354.00 201.00 7415.00
1994 272.00 259.50 508.00 590.50 762.00 904.00 928.50 989.50 844.50 657.00 230.50 189.50 7135.50
1995 379.50 389.00 418.50 521.50 692.00 841.50 1036.00 985.00 855.00 714.50 535.00 367.00 7734.50
1996 307.50 395.50 496.00 626.00 786.50 930.50 1048.50 996.00 801.50 691.00 461.50 368.00 7908.50
1997 350.00 382.50 549.00 624.50 906.50 906.50 1013.50 969.00 891.00 651.00 463.50 285.00 7992.00
1998 361.50 291.50 444.50 507.50 606.50 832.50 995.50 1022.00 839.00 635.00 377.00 209.00 7121.50
1999 0.00 z 265.50 340.50 545.17 a 720.50 867.00 961.50 889.18 a 812.68 b 704.45 b 482.59 a 295.00 6884.07
2000 327.50 386.00 480.50 629.48 a 820.35 d 939.44 c 973.40 a 0.00 z 851.50 632.00 325.71 b 284.68 a 6650.58
2001 174.50 276.50 515.50 515.00 972.50 1016.90 a 1007.50 a 1020.00 831.21 a 767.50 443.28 a 307.50 7847.88
2002 212.00 321.50 401.50 592.00 783.50 976.50 1040.50 987.50 866.50 659.50 470.50 299.00 7610.50
2003 380.00 311.50 495.50 450.00 798.50 934.00 1078.00 1021.50 911.50 0.00 z 333.50 277.50 6991.50
2004 269.50 313.50 640.50 653.00 829.50 963.00 1009.50 1053.50 928.00 656.00 384.50 276.00 7976.50
2005 217.50 377.50 507.50 563.00 774.00 861.00 1090.00 980.00 797.00 704.73 a 473.00 335.32 a 7680.55
2006 316.00 307.50 291.00 550.50 781.50 979.50 1128.29 b 937.23 a 863.00 632.50 434.00 233.50 7454.53
2007 198.50 293.00 552.50 623.00 786.00 937.50 1028.50 1037.50 835.50 605.50 455.50 199.50 7552.50
2008 192.50 293.22 b 438.50 562.50 811.50 988.00 1017.00 1062.50 856.00 746.50 485.00 153.50 7606.72
2009 284.00 283.50 449.50 583.00 798.50 876.72 a 982.70 a 1011.50 951.50 669.00 402.50 218.00 7510.42
2010 280.00 336.50 0.00 z 474.50 625.00 911.38 a 893.00 882.00 869.00 683.00 396.00 315.50 6665.88
2011 0.00 z 203.58 d 384.06 d 348.00 i 659.35 e 615.50 g 886.37 d 728.50 f 887.88 d 695.12 e 340.56 c 198.06 d 4254.97
2012 249.66 c 339.41 b 326.07 d 543.62 a 746.67 b 835.00 942.50 918.50 0.00 z 0.00 z 0.00 z 0.00 z 4901.44
Period of Record Statistics
MEAN 237.85 320.13 440.53 538.31 711.60 846.45 941.86 925.93 842.68 696.51 423.52 250.90 7240.54
S.D. 71.32 69.27 80.94 73.45 82.52 73.83 67.98 68.01 71.22 64.13 63.74 65.71 471.54
SKEW -0.28 0.10 0.26 -0.54 0.28 0.42 0.23 0.11 0.28 0.13 -0.14 0.23 -0.15
MAX 380.00 506.00 640.50 669.50 972.50 1085.50 1128.29 1066.50 1075.00 840.50 556.50 437.50 8191.50
MIN 52.50 169.50 291.00 289.50 519.00 692.50 799.50 772.50 676.50 552.00 230.50 130.50 6253.41
NO YRS 103 110 109 109 109 108 110 108 107 107 105 109 82