PETALUMA AP, CALIFORNIA

Monthly Total Growing Degree Days

(046826)

Base Temperature = 50 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 134.00 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 134.00
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 184.00 i 67.00 105.00 236.00 341.00 501.50 556.50 511.50 350.50 81.50 40.00 2790.50
1914 45.00 44.00 202.50 175.50 245.50 320.00 422.00 424.50 358.00 297.50 108.00 8.50 2651.00
1915 17.00 35.50 130.00 147.50 177.00 322.50 468.00 498.00 380.00 333.00 100.00 38.00 2646.50
1916 6.50 108.00 107.50 157.50 172.00 299.50 475.50 434.00 428.50 166.50 48.50 7.50 2411.50
1917 0.00 35.50 32.00 101.00 122.00 375.00 522.00 405.00 454.50 336.50 128.00 41.50 2553.00
1918 7.50 22.00 67.50 110.00 124.50 396.00 399.50 280.00 244.50 213.50 32.50 5.50 1903.00
1919 1.00 13.00 17.00 67.50 225.50 313.50 408.50 438.50 396.50 237.50 66.50 10.00 2195.00
1920 11.50 29.50 62.50 254.50 368.50 465.50 506.50 558.50 418.00 281.50 121.50 37.00 3115.00
1921 6.00 137.50 219.50 246.50 264.00 521.00 575.50 576.00 509.00 461.50 208.00 113.50 3838.00
1922 18.50 86.50 147.00 211.50 329.50 431.00 483.00 437.00 509.50 281.50 38.00 23.00 2996.00
1923 11.50 60.00 115.50 117.50 226.50 265.00 431.00 493.50 511.00 393.50 328.50 67.00 3020.50
1924 43.50 163.50 94.00 232.00 399.00 416.50 428.50 456.50 438.50 248.50 88.00 17.50 3026.00
1925 133.50 43.50 82.50 119.00 234.50 357.50 457.50 409.00 385.50 320.50 192.50 21.50 2757.00
1926 32.00 86.00 97.50 256.50 297.50 441.00 518.00 484.00 361.50 411.00 220.00 48.50 3253.50
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 186.00 p 368.00 162.00 25.00 555.00
1928 37.00 59.00 184.00 307.22 c 331.50 445.50 461.00 466.50 480.00 285.00 113.50 30.50 3200.72
1929 4.00 29.00 90.00 92.00 192.00 402.50 512.50 583.00 384.50 575.00 197.50 272.00 3334.00
1930 83.50 246.00 280.50 302.00 129.50 350.50 433.00 452.00 369.50 334.00 79.00 8.00 3067.50
1931 34.50 105.00 119.50 200.00 419.50 397.50 561.50 498.50 437.00 319.00 123.00 4.50 3219.50
1932 6.50 40.00 166.00 91.50 236.50 388.00 449.00 469.00 485.00 264.00 202.50 3.50 2801.50
1933 0.00 3.50 86.50 133.00 161.50 349.00 521.00 475.50 395.50 433.50 130.50 19.00 2708.50
1934 65.00 69.50 248.00 256.50 343.00 417.00 450.00 499.00 446.00 342.50 178.00 43.00 3357.50
1935 8.00 35.50 39.50 200.50 291.50 470.00 492.50 458.50 431.50 292.50 46.50 11.50 2778.00
1936 38.50 57.50 169.50 216.50 381.00 445.50 528.50 485.50 491.00 407.50 104.50 10.00 3335.50
1937 0.00 8.00 120.50 117.50 304.50 429.50 549.00 506.50 439.00 401.50 123.50 48.50 3048.00
1938 6.00 46.00 65.00 131.00 299.50 414.50 516.00 497.00 477.50 331.50 67.50 57.00 2908.50
1939 17.50 49.00 95.50 227.50 311.50 433.00 474.00 481.50 573.00 366.00 154.00 60.50 3243.00
1940 80.50 114.50 181.00 237.00 309.00 430.86 a 484.50 523.00 473.00 380.00 84.50 91.50 3389.36
1941 66.50 108.00 187.50 149.00 369.50 415.50 548.00 500.00 473.00 325.50 171.50 66.00 3380.00
1942 46.50 53.00 94.00 159.00 272.00 406.00 554.50 514.00 448.00 376.00 123.50 32.50 3079.00
1943 35.13 a 77.50 150.00 190.34 a 364.77 a 373.50 516.67 a 516.67 a 546.50 357.50 167.50 36.00 3332.08
1944 11.50 30.50 149.50 112.50 299.50 394.50 475.00 517.50 527.00 411.50 71.00 41.50 3041.50
1945 6.50 63.00 42.00 205.00 219.50 490.18 b 529.50 494.00 489.00 368.00 101.00 42.50 3050.18
1946 13.00 16.50 84.00 143.00 241.50 368.50 509.50 472.50 457.50 261.90 b 52.50 20.00 2640.40
1947 2.50 80.77 b 135.37 a 118.00 o 338.23 c 478.50 461.00 496.00 b 468.33 c 346.50 62.00 19.00 2888.20
1948 32.50 23.20 d 31.50 94.00 201.50 a 382.00 512.50 526.00 447.00 340.50 119.00 6.50 2716.20
1949 0.00 38.50 131.00 222.00 321.00 472.50 483.71 b 479.43 b 533.50 301.50 215.50 22.00 3220.64
1950 36.50 55.00 79.00 221.50 288.50 397.50 511.50 578.50 502.50 386.00 254.00 96.00 3406.50
1951 24.00 63.00 125.50 131.00 298.00 375.50 471.00 507.50 453.50 367.00 151.50 27.50 2995.00
1952 11.00 51.50 91.50 192.50 326.50 342.50 534.50 490.50 553.50 377.00 94.00 36.50 3101.50
1953 96.00 57.50 92.50 133.50 218.50 363.00 531.00 497.50 535.00 370.00 107.50 h 36.96 e 2931.46
1954 29.81 e 54.00 34.00 196.00 281.50 394.00 562.50 454.50 451.50 345.50 139.50 23.50 2966.31
1955 3.50 28.00 64.00 42.00 293.50 353.00 466.00 504.50 467.50 343.07 a 136.00 73.00 2774.07
1956 25.50 23.50 66.00 131.50 274.00 431.50 470.00 498.50 492.00 276.00 120.00 22.50 2831.00
1957 3.50 103.50 116.50 200.00 286.50 487.50 550.50 503.00 548.50 323.00 70.00 20.50 3213.00
1958 25.00 121.50 31.00 190.50 347.50 486.50 553.50 642.73 a 621.50 452.50 186.50 85.00 3743.73
1959 60.50 39.00 153.45 a 233.89 c 296.50 489.50 594.00 548.00 505.00 443.30 a 140.50 28.00 3531.64
1960 29.50 53.50 147.50 181.00 271.50 558.00 522.00 502.50 477.00 374.00 97.00 27.00 3240.50
1961 24.00 69.00 48.50 166.00 167.00 476.50 600.00 598.50 514.50 385.50 109.50 25.00 3184.00
1962 34.50 42.50 35.00 209.50 226.00 412.50 482.50 554.50 467.00 351.50 181.00 49.50 3046.00
1963 11.00 168.00 52.00 92.00 258.00 385.50 476.00 522.50 570.50 363.50 103.50 1.50 3004.00
1964 7.50 44.00 70.50 131.00 193.00 366.00 502.50 527.50 479.50 421.00 90.50 98.50 2931.50
1965 19.00 29.00 77.00 178.50 223.20 a 317.50 477.00 579.50 434.50 458.00 182.00 0.00 2975.20
1966 38.50 23.50 116.00 252.00 292.50 448.50 457.50 537.50 501.00 369.00 151.00 32.00 3219.00
1967 36.00 19.50 67.00 5.00 281.00 342.50 542.00 0.00 z 566.50 415.00 211.50 39.00 2525.00
1968 8.50 157.00 137.50 198.00 265.50 461.50 536.00 543.00 517.00 314.00 108.00 13.50 3259.50
1969 22.00 16.50 102.50 122.00 359.50 401.50 538.50 589.50 533.79 a 346.00 124.00 78.61 c 3234.40
1970 94.50 79.50 182.00 98.50 374.00 414.00 532.50 517.00 533.00 285.50 170.50 26.50 3307.50
1971 23.00 35.50 71.00 107.00 241.00 396.00 516.50 615.50 561.00 285.50 98.00 3.50 2953.50
1972 7.00 81.50 198.00 178.50 310.00 422.50 558.00 565.00 446.50 351.50 68.50 25.50 3212.50
1973 26.00 74.00 58.50 230.00 349.00 530.50 544.50 457.50 473.00 349.00 130.50 26.50 3249.00
1974 75.50 22.50 135.00 175.00 258.00 445.00 542.00 563.00 519.00 409.00 115.00 23.50 3282.50
1975 4.50 44.50 94.50 75.00 337.50 398.00 510.50 527.00 471.00 304.00 69.50 31.50 2867.50
1976 10.50 64.00 68.50 125.00 365.00 498.00 539.00 547.50 497.00 397.00 212.50 9.50 3333.50
1977 5.50 84.00 49.50 230.00 204.50 451.00 519.50 539.00 462.00 349.50 163.50 61.50 3119.50
1978 57.50 81.50 203.50 156.00 376.00 411.50 524.00 541.50 523.50 411.00 92.00 6.20 a 3384.20
1979 13.00 15.50 123.50 169.00 368.00 419.50 561.50 507.00 602.00 377.50 107.00 32.00 3295.50
1980 40.00 107.50 91.00 188.00 247.00 375.50 545.00 476.50 486.50 388.00 141.00 30.50 3116.50
1981 38.00 93.00 94.03 a 216.00 336.00 584.00 506.00 533.00 458.50 274.00 178.00 57.00 3367.53
1982 2.00 92.00 60.00 206.00 310.00 326.00 497.00 503.50 482.00 322.00 43.50 13.00 2857.00
1983 0.00 z 56.00 95.00 117.00 270.50 416.00 546.50 597.50 569.00 441.50 118.00 69.50 3296.50
1984 42.50 26.00 195.00 164.50 425.50 432.00 646.50 572.50 593.00 302.00 81.50 16.00 3497.00
1985 1.00 96.50 66.00 283.50 256.00 521.50 582.00 501.50 410.50 335.50 95.00 27.00 3176.00
1986 76.50 147.00 229.00 194.50 313.00 468.50 533.00 518.00 360.50 374.00 166.50 19.00 3399.50
1987 16.00 78.50 119.50 289.50 445.50 478.50 475.00 539.00 507.50 454.00 137.50 53.00 3593.50
1988 20.50 112.50 209.50 236.50 313.00 457.50 604.00 550.00 467.50 365.50 124.50 45.00 3506.00
1989 5.50 32.50 138.00 306.00 329.00 415.00 552.50 533.50 455.50 321.50 132.00 13.50 3234.50
1990 24.00 41.00 128.00 307.00 332.00 464.50 569.00 0.00 z 542.00 0.00 z 0.00 z 0.00 z 2407.50
1991 42.00 151.50 60.50 176.50 267.50 376.50 232.50 r 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1074.50
1992 8.00 118.50 165.50 240.00 a 398.50 416.00 514.50 521.00 468.00 427.50 155.50 16.00 3449.00
1993 13.00 39.50 174.50 163.00 317.00 472.00 506.00 555.50 452.50 373.50 94.50 22.00 3183.00
1994 20.50 19.50 147.00 156.00 264.50 395.50 442.50 492.50 447.00 315.50 25.00 2.00 2727.50
1995 84.00 128.50 89.50 130.50 216.50 376.50 533.50 534.00 457.00 392.50 239.50 64.50 3246.50
1996 25.50 152.00 165.00 228.50 307.50 428.00 519.50 519.50 450.00 349.50 154.50 83.00 3382.50
1997 65.50 58.50 174.50 231.50 439.00 453.50 540.50 575.00 583.50 376.00 213.00 37.50 3748.00
1998 81.50 51.50 94.00 99.00 119.50 n 383.00 528.50 578.50 254.00 m 347.00 99.00 23.50 2285.50
1999 31.00 d 38.00 41.00 181.00 219.00 0.00 z 466.50 515.50 490.50 432.00 180.00 37.00 2631.50
2000 53.00 100.00 0.00 z 238.00 240.00 g 443.00 449.00 508.50 517.00 316.20 a 82.50 33.50 2740.70
2001 8.00 0.00 z 175.50 110.00 436.50 485.50 490.50 504.86 c 477.93 a 440.00 169.50 27.50 3325.79
2002 21.50 72.50 92.00 205.00 279.00 465.50 567.50 527.50 516.50 337.50 172.00 41.00 3297.50
2003 97.50 47.50 147.00 85.50 302.00 450.00 566.00 558.50 521.50 426.50 68.50 48.00 3318.50
2004 23.50 24.00 278.00 265.50 347.50 441.50 537.50 606.50 551.00 314.50 92.50 45.50 3527.50
2005 6.00 72.50 172.50 146.00 320.50 395.50 442.00 f 517.00 412.50 347.50 158.50 85.00 2633.50
2006 30.00 67.50 23.00 168.50 326.50 503.00 610.00 490.00 465.00 b 306.50 135.50 30.50 3156.00
2007 4.50 44.50 184.45 a 186.00 325.00 434.50 549.50 556.50 452.00 280.50 120.00 23.50 3160.95
2008 9.30 a 29.50 63.50 154.50 345.00 466.50 518.00 563.50 488.00 387.00 161.00 6.00 3191.80
2009 25.50 32.50 117.50 142.50 333.50 403.00 480.50 545.00 568.00 319.82 a 85.00 16.50 3069.32
2010 16.50 54.50 100.00 108.50 199.50 430.00 236.00 n 462.00 504.00 364.00 146.50 56.50 2442.00
2011 21.18 a 45.77 b 82.84 b 147.22 c 204.17 b 380.19 d 484.78 b 481.02 a 536.90 a 346.54 c 51.00 40.00 2821.61
2012 16.50 61.00 68.50 197.00 293.50 413.00 499.50 498.50 410.50 404.50 168.00 41.50 3072.00
2013 13.50 5.00 v 16.50 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 13.50
Period of Record Statistics
MEAN 28.32 65.06 114.73 174.58 289.80 418.85 512.57 514.15 480.00 354.13 128.63 37.08 3116.03
S.D. 26.87 42.59 57.79 62.01 70.46 56.88 46.40 51.80 61.27 60.31 54.21 34.05 319.95
SKEW 1.47 1.36 0.63 0.04 -0.13 0.08 0.00 -0.82 -0.51 0.12 0.61 3.66 -0.84
MAX 133.50 246.00 280.50 307.22 445.50 584.00 646.50 642.73 621.50 575.00 328.50 272.00 3838.00
MIN 0.00 3.50 17.00 5.00 122.00 265.00 399.50 280.00 244.50 166.50 25.00 0.00 1903.00
NO YRS 98 97 99 98 97 98 96 96 97 98 97 98 86