SONOMA, CALIFORNIA

Monthly Total Growing Degree Days

(048351)

Base Temperature = 40 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1952 0.00 z 108.50 m 328.27 c 477.86 b 598.62 b 619.44 c 866.89 c 833.26 b 826.50 649.00 277.50 248.00 5725.34
1953 315.00 286.50 316.00 404.50 495.50 652.50 857.00 788.50 846.00 574.00 379.50 247.50 6162.50
1954 208.50 259.00 279.50 510.00 626.00 710.00 860.50 745.00 705.50 559.50 353.00 152.00 5968.50
1955 103.00 203.00 334.00 323.00 653.00 695.00 813.00 819.00 781.00 617.00 349.50 308.45 a 5998.95
1956 248.50 190.00 351.50 458.50 626.00 773.00 880.00 835.00 784.50 560.50 384.00 157.50 6249.00
1957 97.00 329.50 395.00 521.00 632.50 858.00 896.00 841.50 807.50 591.00 319.00 203.00 6491.00
1958 192.50 378.50 295.50 497.00 682.00 794.00 923.50 1017.00 904.50 712.40 e 424.50 329.50 7150.90
1959 299.00 153.50 j 486.00 584.50 639.00 815.50 975.50 910.88 a 791.54 d 747.50 382.24 a 214.50 6846.16
1960 179.00 j 313.63 b 447.95 a 477.50 611.50 914.00 937.00 876.00 770.00 628.50 338.00 213.50 6527.58
1961 185.50 337.00 355.50 509.50 534.00 874.04 d 981.50 953.00 773.00 654.50 361.50 157.50 6676.54
1962 176.00 246.00 323.50 551.00 580.00 790.00 870.00 909.50 766.00 648.50 423.50 249.50 6533.50
1963 97.00 460.00 341.00 373.00 626.50 758.50 840.00 895.00 896.00 658.50 352.50 112.50 6410.50
1964 174.00 301.00 359.00 463.50 547.50 729.00 887.50 892.00 776.38 a 709.00 318.50 316.00 6473.38
1965 211.50 297.00 381.50 486.50 626.00 683.50 855.50 902.00 699.00 731.50 408.00 99.00 6381.00
1966 221.50 226.50 413.00 596.50 658.00 790.50 819.50 921.00 814.00 684.00 394.50 223.50 6762.50
1967 244.00 254.50 335.50 254.50 640.00 722.50 937.50 974.50 885.50 708.00 451.50 182.50 6590.50
1968 152.50 422.50 437.50 527.50 616.50 827.00 933.00 895.00 856.50 625.00 378.00 159.00 6830.00
1969 145.50 198.00 391.50 430.50 716.00 751.50 924.50 963.50 838.50 616.00 372.50 325.50 6673.50
1970 316.00 345.50 465.50 385.00 736.00 776.50 927.00 849.00 830.00 581.00 427.50 190.50 6829.50
1971 216.00 256.50 366.50 405.50 568.50 737.50 902.00 947.00 835.50 581.00 322.00 117.00 6255.00
1972 85.50 340.00 512.50 501.00 710.00 866.50 1009.00 966.50 799.50 686.00 337.00 166.00 6979.50
1973 219.00 360.50 359.50 615.54 b 779.50 941.50 980.00 905.00 883.50 709.50 395.50 299.00 7448.04
1974 290.00 276.37 a 432.00 509.00 663.00 873.50 974.00 986.00 917.50 755.50 389.00 218.00 7283.87
1975 209.00 280.00 402.50 357.50 757.50 828.00 909.50 955.00 910.50 660.00 381.50 309.00 6960.00
1976 262.50 304.00 386.00 448.50 707.50 829.00 968.50 877.50 852.50 750.00 464.00 264.50 7114.50
1977 136.00 f 375.00 382.50 612.50 558.50 897.00 972.50 1004.00 830.50 747.00 483.00 387.00 7249.50
1978 380.35 e 367.00 568.50 471.00 816.50 830.50 984.77 a 972.00 920.00 800.12 b 363.00 143.50 7617.23
1979 237.50 303.00 452.00 534.00 759.50 e 887.59 a 1007.50 b 925.00 974.00 0.00 z 384.50 287.78 a 6752.37
1980 305.87 a 461.00 454.50 515.00 621.07 b 62.00 z 968.00 932.00 839.48 a 731.50 472.50 276.00 6576.92
1981 299.50 372.00 406.50 548.00 687.00 1050.50 919.50 928.00 855.50 651.00 530.36 b 337.50 7585.36
1982 144.50 360.50 355.50 459.50 675.00 716.00 894.00 921.50 853.00 687.00 276.50 244.00 6587.00
1983 220.00 355.50 421.50 427.50 655.00 823.00 938.00 1004.00 994.50 796.50 418.00 348.00 7401.50
1984 293.50 306.50 542.00 483.50 0.00 z 817.00 1048.00 969.50 997.50 668.50 356.50 187.50 6670.00
1985 107.00 352.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 850.00 729.50 653.50 283.00 116.50 3092.00
1986 344.50 406.00 543.50 503.50 680.50 821.00 914.50 888.50 697.50 723.00 499.50 218.50 7240.50
1987 228.50 343.00 420.00 616.00 771.00 843.00 845.00 933.50 849.00 783.50 395.50 256.50 7284.50
1988 258.00 373.00 508.00 549.00 643.50 814.50 1034.50 943.50 814.00 725.00 418.50 235.00 7316.50
1989 171.50 217.50 433.00 611.50 663.50 826.50 935.00 904.00 782.50 651.00 431.50 187.50 6815.00
1990 242.00 223.00 438.00 630.00 668.50 837.50 983.50 986.00 877.50 745.00 413.50 146.50 7191.00
1991 249.50 421.50 332.50 463.00 610.50 721.50 941.00 884.00 868.50 792.00 457.24 a 216.00 6957.24
1992 155.00 a 399.50 459.50 617.50 816.50 801.00 964.50 976.00 856.50 759.00 446.00 184.00 7435.00
1993 178.00 235.00 512.50 516.50 714.50 886.00 949.00 950.15 a 825.50 738.50 372.00 189.00 7066.65
1994 242.00 252.00 503.00 536.50 676.00 834.50 868.00 945.50 838.50 676.00 259.00 180.00 6811.00
1995 340.00 401.00 404.00 509.50 629.50 797.50 988.50 959.50 849.50 739.50 535.00 368.00 7521.50
1996 286.00 388.50 472.00 551.00 707.00 858.62 a 1015.50 1007.00 808.50 706.50 442.00 333.00 7575.62
1997 282.50 337.50 506.50 595.00 832.50 878.50 990.50 949.50 920.00 713.50 481.00 245.50 7732.50
1998 308.00 288.00 443.00 477.00 528.50 761.00 960.50 1012.00 861.50 658.00 376.00 167.00 6840.50
1999 203.57 a 259.00 313.50 514.50 605.50 777.50 907.50 922.50 844.50 734.00 461.38 a 272.59 b 6816.03
2000 307.93 a 351.50 464.50 558.50 719.00 891.50 884.00 940.00 875.50 664.50 312.86 b 238.70 a 7208.49
2001 175.67 a 269.00 494.00 449.00 880.50 913.00 944.50 957.50 826.03 a 766.00 453.10 a 288.82 a 7417.12
2002 206.15 a 331.00 389.00 519.00 646.00 846.00 976.00 926.50 858.00 684.50 479.00 286.50 7147.65
2003 363.50 302.00 466.00 370.00 672.50 834.00 1005.50 938.00 907.50 789.00 334.50 278.48 a 7260.98
2004 253.68 a 310.50 613.00 564.50 702.00 848.00 948.50 975.00 907.00 654.50 387.50 266.17 b 7430.36
2005 198.00 357.50 473.50 456.00 652.00 739.00 1004.50 929.00 738.00 677.00 468.50 306.90 a 6999.90
2006 281.50 301.00 267.00 469.50 702.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2021.00
Period of Record Statistics
MEAN 229.48 318.59 417.32 496.23 666.50 810.81 934.36 923.91 839.82 688.92 395.84 234.36 6945.26
S.D. 71.91 66.16 76.89 79.29 78.44 77.44 56.56 57.31 66.47 63.50 64.02 70.78 455.44
SKEW -0.08 0.04 0.22 -0.58 0.41 0.08 -0.21 -0.82 0.04 -0.22 0.01 0.08 -0.33
MAX 380.35 461.00 613.00 630.00 880.50 1050.50 1048.00 1017.00 997.50 800.12 535.00 387.00 7732.50
MIN 85.50 190.00 267.00 254.50 495.50 619.44 813.00 745.00 697.50 559.50 259.00 99.00 5968.50
NO YRS 52 53 54 54 53 52 53 54 54 53 54 54 46