PETALUMA AP, CALIFORNIA

Monthly Total Growing Degree Days

(046826)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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 428.00 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 428.00
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 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 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
1905 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
1906 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
1907 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
1908 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
1909 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
1910 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
1911 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
1912 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
1913 0.00 z 374.00 i 315.50 384.00 546.00 641.00 811.50 866.50 811.50 660.50 329.50 238.50 5604.50
1914 292.50 289.50 496.00 475.50 555.50 620.00 732.00 734.50 658.00 607.50 385.50 147.00 5993.50
1915 217.50 290.00 428.50 447.50 477.50 622.50 778.00 808.00 680.00 643.00 356.00 242.00 5990.50
1916 126.00 375.50 382.00 454.00 478.50 599.50 785.50 744.00 728.50 475.00 269.00 127.50 5545.00
1917 101.00 250.50 235.00 364.00 421.50 675.00 832.00 715.00 754.50 646.50 421.00 290.00 5706.00
1918 232.00 213.00 329.00 390.50 425.50 696.00 709.50 590.00 544.50 518.50 227.50 97.50 4973.50
1919 135.00 158.00 214.00 335.50 530.00 613.50 718.50 748.50 696.50 530.00 335.00 163.00 5177.50
1920 230.00 250.00 318.50 554.50 678.50 765.50 816.50 868.50 718.00 591.50 413.50 312.50 6517.50
1921 150.00 400.50 529.50 546.50 574.00 821.00 885.50 886.00 809.00 771.50 501.50 418.00 7293.00
1922 255.50 354.00 454.00 511.50 639.50 731.00 793.00 747.00 809.50 589.50 306.50 236.50 6427.50
1923 151.50 245.50 416.50 412.50 536.50 565.00 741.00 803.50 811.00 703.50 628.50 349.50 6364.50
1924 286.50 453.50 384.50 532.00 709.00 716.50 738.50 766.50 738.50 558.00 376.50 194.00 6454.00
1925 386.50 306.50 338.00 405.00 544.50 657.50 767.50 719.00 685.50 630.50 492.50 235.00 6168.00
1926 259.00 329.50 394.50 556.50 607.50 741.00 828.00 794.00 661.50 721.00 518.50 253.00 6664.00
1927 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 326.00 p 678.00 449.50 220.50 1348.00
1928 254.50 340.50 490.00 603.89 c 641.50 745.50 771.00 776.50 780.00 592.00 398.00 228.00 6621.39
1929 158.50 234.00 372.00 350.50 497.00 702.50 822.50 893.00 684.50 885.00 492.00 581.50 6673.00
1930 328.50 523.50 589.50 602.00 429.50 650.50 743.00 762.00 669.50 644.00 358.00 179.50 6479.50
1931 257.50 377.00 429.50 500.00 729.50 697.50 871.50 808.50 737.00 627.50 356.00 159.50 6551.00
1932 179.00 245.00 476.00 378.50 546.50 688.00 759.00 779.00 785.00 574.00 500.00 142.50 6052.50
1933 95.50 174.50 384.50 421.00 470.00 649.00 831.00 785.50 695.50 743.50 427.50 209.50 5887.00
1934 296.00 340.00 558.00 556.50 653.00 717.00 760.00 809.00 746.00 652.50 478.00 323.00 6889.00
1935 198.00 287.50 282.50 499.00 601.50 770.00 802.50 768.50 731.50 590.50 310.00 228.50 6070.00
1936 313.00 288.00 460.50 509.50 691.00 745.50 838.50 795.50 791.00 717.50 402.00 202.00 6754.00
1937 49.50 204.00 414.50 405.50 614.50 729.50 859.00 816.50 739.00 711.50 422.00 287.00 6252.50
1938 232.50 275.00 351.00 430.00 609.50 714.50 826.00 807.00 777.50 641.50 341.00 333.00 6338.50
1939 260.50 251.00 380.00 527.50 621.50 733.00 784.00 791.50 873.00 676.00 454.00 343.00 6695.00
1940 292.50 388.50 480.50 537.00 619.00 730.86 a 794.50 833.00 773.00 689.50 376.50 365.00 6879.86
1941 350.50 374.00 497.50 445.50 679.50 715.50 858.00 810.00 773.00 635.50 443.00 310.00 6892.00
1942 258.50 295.50 388.50 459.00 581.00 706.00 864.50 824.00 748.00 686.00 411.00 284.00 6506.00
1943 258.33 a 329.50 457.50 490.34 a 674.77 a 673.50 826.67 a 826.67 a 846.50 667.50 466.00 312.00 6829.28
1944 251.50 282.50 454.50 409.50 609.50 694.50 785.00 827.50 827.00 721.50 350.00 289.00 6502.00
1945 190.00 326.00 295.50 500.50 529.50 790.18 b 839.50 804.00 789.00 678.00 383.00 243.00 6368.18
1946 212.00 182.00 374.50 434.50 551.50 668.50 819.50 782.50 757.50 566.02 b 325.50 226.00 5900.02
1947 108.00 326.85 b 440.72 a 268.00 o 648.23 c 778.50 771.00 806.00 b 768.33 c 656.50 329.50 211.00 5844.63
1948 248.50 198.94 d 296.50 375.00 510.47 a 682.00 822.50 836.00 747.00 645.00 398.50 147.00 5907.41
1949 74.50 235.50 439.50 522.00 631.00 772.50 793.71 b 789.43 b 833.50 611.50 515.50 192.00 6410.64
1950 164.00 287.50 362.00 521.50 594.00 697.50 821.50 888.50 802.50 696.00 554.00 378.50 6767.50
1951 251.00 277.50 407.00 431.00 608.00 675.50 781.00 817.50 753.50 677.00 438.50 216.00 6333.50
1952 171.00 295.00 346.50 492.00 636.50 642.50 844.50 800.50 853.50 687.00 337.50 293.50 6400.00
1953 372.50 320.50 381.00 418.50 528.00 663.00 841.00 807.50 835.00 680.00 325.50 h 298.67 e 6145.67
1954 260.52 e 288.00 291.50 492.00 591.50 694.00 872.50 764.50 751.50 655.50 428.00 183.50 6273.02
1955 146.50 233.50 330.50 311.50 603.50 653.00 776.00 814.50 767.50 653.07 a 396.50 325.50 6011.57
1956 268.00 222.50 353.50 424.00 584.00 731.50 780.00 808.50 792.00 583.00 402.00 171.00 6120.00
1957 125.00 333.50 413.00 498.00 596.50 787.50 860.50 813.00 848.50 633.00 350.00 222.50 6481.00
1958 239.50 386.50 295.00 488.50 657.50 786.50 863.50 952.73 a 921.50 762.50 466.50 378.50 7198.73
1959 329.50 262.00 458.80 a 533.89 c 606.50 789.50 904.00 858.00 805.00 753.30 a 437.00 246.50 6983.99
1960 236.50 326.50 449.50 464.00 581.50 858.00 832.00 812.50 777.00 684.00 377.50 230.00 6629.00
1961 177.00 331.50 335.00 450.00 477.00 776.50 910.00 908.50 814.50 695.50 390.50 195.00 6461.00
1962 203.00 260.50 309.50 508.00 536.00 712.50 792.50 864.50 767.00 661.50 479.00 273.00 6367.00
1963 123.50 448.00 332.50 364.50 568.00 685.50 786.00 832.50 870.50 673.50 383.00 121.00 6188.50
1964 177.50 295.00 326.50 420.50 498.50 666.00 812.50 837.50 779.50 731.00 342.50 327.00 6214.00
1965 242.50 282.50 371.00 464.00 533.20 a 617.50 787.00 889.50 734.50 768.00 465.00 112.00 6266.70
1966 243.50 233.50 384.00 552.00 602.50 748.50 767.50 847.50 801.00 679.00 424.00 241.00 6524.00
1967 257.50 260.00 336.50 247.00 590.00 642.50 852.00 0.00 z 866.50 725.00 489.50 210.00 5476.50
1968 172.00 428.50 442.50 496.00 575.50 761.50 846.00 853.00 817.00 624.00 384.00 191.00 6591.00
1969 165.00 200.50 364.00 415.00 669.50 701.50 848.50 899.50 833.79 a 656.00 409.50 349.86 c 6512.65
1970 344.00 355.00 482.00 385.50 684.00 714.00 842.50 827.00 833.00 595.50 468.50 192.00 6723.00
1971 216.00 254.50 337.00 396.50 551.00 696.00 826.50 925.50 861.00 592.50 388.00 162.50 6207.00
1972 117.00 341.50 501.50 477.00 620.00 722.50 868.00 875.00 746.50 661.50 339.00 162.50 6432.00
1973 215.00 343.00 340.00 530.00 659.00 830.50 854.50 767.50 773.00 659.00 407.50 294.50 6673.50
1974 282.00 269.00 426.00 475.00 567.50 745.00 852.00 873.00 819.00 719.00 405.50 240.00 6673.00
1975 184.50 281.50 389.00 342.50 645.00 698.00 820.50 837.00 771.00 614.00 331.00 264.50 6178.50
1976 227.00 319.50 334.00 418.50 675.00 798.00 849.00 857.50 797.00 707.00 497.00 200.00 6679.50
1977 153.00 348.00 318.50 523.00 514.00 751.00 829.50 849.00 762.00 659.50 447.50 328.00 6483.00
1978 341.50 343.50 513.50 455.00 686.00 711.50 834.00 851.50 823.50 721.00 342.00 123.48 a 6746.48
1979 202.00 243.00 424.00 466.00 678.00 719.50 871.50 817.00 902.00 687.50 382.00 260.00 6652.50
1980 259.00 389.50 390.50 487.50 557.00 675.50 855.00 786.50 786.50 698.00 438.50 263.00 6586.50
1981 282.50 359.50 390.60 a 515.00 646.00 884.00 816.00 843.00 758.50 584.00 468.50 334.00 6881.60
1982 124.50 328.00 335.50 492.50 620.00 626.00 807.00 813.50 782.00 632.00 275.00 177.00 6013.00
1983 0.00 z 324.00 389.00 409.00 580.50 716.00 856.50 907.50 869.00 751.50 391.50 329.50 6524.00
1984 259.50 279.50 502.50 463.50 735.50 732.00 956.50 882.50 893.00 606.00 353.00 180.50 6844.00
1985 123.50 314.00 330.00 583.50 562.00 821.50 892.00 811.50 710.50 643.50 295.00 143.50 6230.50
1986 354.00 409.50 534.00 494.00 622.00 768.50 843.00 828.00 660.50 684.00 454.50 234.50 6886.50
1987 215.00 329.00 413.50 589.50 755.50 778.50 785.00 849.00 807.50 764.00 418.00 243.00 6947.50
1988 254.50 374.00 519.50 536.50 620.50 757.50 914.00 860.00 767.50 675.50 415.00 245.50 6940.00
1989 165.00 201.50 422.00 605.00 639.00 715.00 862.50 843.50 755.50 631.50 422.50 182.00 6445.00
1990 238.50 209.00 421.50 607.00 642.00 764.50 879.00 0.00 z 842.00 0.00 z 0.00 z 0.00 z 4603.50
1991 264.50 428.50 338.50 476.50 577.50 676.50 362.50 r 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2762.00
1992 187.50 398.50 475.50 540.00 a 708.50 716.00 824.50 831.00 768.00 737.50 446.50 182.50 6816.00
1993 194.00 263.00 482.00 463.00 626.50 772.00 816.00 865.50 752.50 683.50 357.00 188.50 6463.50
1994 266.50 222.50 445.00 454.50 574.50 695.50 752.50 802.50 747.00 625.50 242.00 164.50 5992.50
1995 367.00 387.00 379.00 423.50 526.50 676.50 843.50 844.00 757.00 702.50 539.50 342.50 6788.50
1996 277.50 408.00 464.00 523.50 617.50 728.00 829.50 829.50 750.00 659.50 454.50 350.00 6891.50
1997 305.00 319.50 474.50 531.50 749.00 753.50 850.50 885.00 883.50 686.00 512.00 296.00 7246.00
1998 367.00 313.00 387.50 344.50 289.50 n 683.00 838.50 888.50 424.00 m 657.00 397.50 209.00 5085.50
1999 235.37 d 265.00 319.50 465.00 529.00 0.00 z 776.50 825.50 790.50 742.00 476.50 297.00 5721.87
2000 316.50 374.50 0.00 z 538.00 480.00 g 743.00 759.00 818.50 817.00 626.20 a 338.50 300.00 5631.20
2001 223.50 0.00 z 479.00 394.50 746.50 785.50 800.50 814.86 c 777.93 a 750.00 450.50 290.00 6512.79
2002 203.00 321.50 367.00 499.00 589.00 765.50 877.50 837.50 816.50 647.50 471.00 305.50 6700.50
2003 372.50 289.50 454.50 374.50 612.00 750.00 876.00 868.50 821.50 736.50 327.00 293.50 6776.00
2004 255.50 272.00 588.00 565.50 657.50 741.50 847.50 916.50 851.00 623.50 368.00 273.00 6959.50
2005 184.50 343.50 480.00 443.00 630.50 695.50 692.00 f 827.00 712.50 657.50 442.00 320.50 5736.50
2006 295.50 291.50 276.00 467.50 636.50 803.00 920.00 800.00 765.00 b 616.50 399.00 216.50 6487.00
2007 183.50 279.00 487.73 a 482.50 635.00 734.50 859.50 866.50 752.00 590.50 395.50 193.50 6459.73
2008 184.45 a 271.50 359.50 439.00 655.00 766.50 828.00 873.50 788.00 697.00 460.50 151.00 6473.95
2009 255.00 260.00 395.00 435.00 643.50 703.00 790.50 855.00 868.00 629.82 a 358.50 198.50 6391.82
2010 259.00 313.50 385.50 391.00 509.50 730.00 406.00 n 772.00 804.00 674.00 386.00 308.50 5533.00
2011 222.68 a 214.31 b 365.05 b 442.22 c 514.17 b 680.19 d 794.78 b 791.02 a 836.90 a 656.54 c 312.00 240.50 6070.35
2012 252.00 314.00 339.00 489.00 603.50 713.00 809.50 808.50 710.50 714.50 454.50 237.50 6445.50
2013 162.00 58.50 v 46.50 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 162.00
Period of Record Statistics
MEAN 228.65 304.48 401.24 466.87 598.99 718.85 822.57 824.15 780.00 663.42 406.49 246.97 6456.30
S.D. 72.29 67.50 75.04 70.30 71.66 56.88 46.40 51.80 61.27 61.31 69.56 77.47 403.41
SKEW -0.01 0.38 0.18 -0.27 -0.19 0.08 -0.01 -0.82 -0.51 0.07 0.10 0.82 -0.90
MAX 386.50 523.50 589.50 607.00 755.50 884.00 956.50 952.73 921.50 885.00 628.50 581.50 7293.00
MIN 49.50 158.00 214.00 247.00 421.50 565.00 709.50 590.00 544.50 475.00 227.50 97.50 4973.50
NO YRS 98 97 99 98 97 98 96 96 97 98 97 98 86