PORTOLA, CALIFORNIA

Monthly Total Growing Degree Days

(047085)

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
1915 8.50 9.00 59.00 128.50 196.50 281.00 573.00 677.50 482.00 261.00 108.00 0.00 z 2784.00
1916 7.00 1.00 83.00 279.50 213.50 288.50 746.00 431.50 284.50 169.50 59.50 12.50 2576.00
1917 1.00 0.00 31.50 210.50 311.50 457.00 938.50 1138.50 346.50 0.00 z 63.00 16.50 3514.50
1918 15.00 32.00 40.00 142.50 168.00 449.50 799.00 629.50 488.00 412.50 143.00 3.50 3322.50
1919 3.50 49.00 28.00 176.50 389.00 347.50 771.50 639.00 495.00 142.00 25.00 11.00 3077.00
1920 49.50 76.50 117.50 111.00 162.00 402.50 499.00 676.50 436.50 132.50 0.00 z 7.50 2671.00
1921 5.50 0.00 z 237.67 a 144.50 0.00 z 648.50 567.30 a 515.00 0.00 z 327.50 137.00 76.50 2659.47
1922 0.00 0.00 0.00 0.00 59.50 365.50 747.00 455.50 358.00 184.00 12.50 22.50 2204.50
1923 8.50 0.00 z 36.50 180.50 408.00 451.50 694.00 626.50 605.50 316.50 92.00 4.50 3424.00
1924 3.50 19.50 4.50 170.50 459.00 758.50 711.00 364.00 166.50 9.50 2.00 1.00 2669.50
1925 3.50 23.50 85.00 283.00 559.00 608.28 a 711.00 489.00 263.00 107.00 9.00 1.00 3142.28
1926 0.00 10.00 143.50 244.50 0.00 z 683.50 823.00 0.00 z 0.00 z 0.00 z 52.00 11.00 1967.50
1927 0.00 0.00 6.00 65.00 234.50 411.00 721.00 531.50 231.00 e 127.00 91.55 a 0.52 a 2419.07
1928 0.00 2.00 54.25 a 50.50 542.00 444.50 672.00 580.50 341.00 8.00 20.00 0.00 2714.75
1929 0.00 m 1.00 l 26.50 88.00 330.50 480.00 723.00 0.00 z 402.00 235.50 59.00 30.00 2374.50
1930 0.00 14.00 65.00 92.00 212.00 577.00 600.00 486.00 401.00 136.00 26.00 0.00 2609.00
1931 0.00 0.00 141.50 265.50 503.75 a 513.50 878.00 692.00 315.50 134.00 36.00 0.00 3479.75
1932 0.00 14.50 109.00 86.50 246.50 681.00 0.00 z 691.30 a 475.50 162.50 0.00 z 0.00 2466.80
1933 0.00 0.00 2.00 126.00 170.50 567.00 757.00 631.00 364.50 485.50 66.00 0.00 3169.50
1934 7.50 12.50 126.00 184.00 301.00 377.50 591.00 0.00 z 0.00 z 286.50 61.50 7.50 1955.00
1935 0.00 z 6.50 17.50 105.00 325.50 569.00 641.50 667.50 532.00 198.73 c 3.00 i 2.00 3065.23
1936 2.58 a 2.50 f 72.50 227.00 275.00 f 526.00 705.50 604.50 0.00 z 226.00 29.50 0.00 2393.58
1937 0.00 l 0.00 25.50 89.50 368.00 473.00 727.00 646.00 463.50 250.50 38.50 7.50 3089.00
1938 4.50 0.00 1.00 130.00 310.50 569.50 694.00 629.00 488.50 190.13 a 6.50 1.50 3025.13
1939 3.00 0.00 95.50 222.50 327.00 460.50 728.50 729.00 459.50 194.00 35.00 24.00 3278.50
1940 11.00 5.00 69.00 156.50 422.00 672.00 637.00 694.50 397.50 258.50 0.50 1.55 a 3325.05
1941 0.00 6.50 27.50 74.00 316.50 417.50 707.00 589.00 343.97 a 139.00 90.50 3.00 2714.47
1942 0.00 0.00 10.00 93.50 194.00 476.00 698.00 644.28 a 401.90 a 272.28 a 43.50 1.50 2834.96
1943 3.00 15.50 0.00 z 0.00 z 325.50 339.83 a 725.00 505.00 553.00 241.00 29.00 0.00 2736.83
1944 0.00 z 3.50 11.50 62.50 304.50 392.50 637.00 591.58 a 503.00 283.50 24.00 12.00 2825.58
1945 3.00 13.50 16.50 151.00 283.00 480.00 0.00 z 0.00 z 0.00 z 323.50 35.50 11.50 1317.50
1946 15.00 7.00 25.00 180.50 324.50 400.00 699.50 671.50 424.00 161.00 17.50 6.50 2932.00
1947 2.50 21.50 87.00 195.00 460.50 491.50 556.50 580.50 518.50 251.50 24.50 1.00 3190.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 650.50 554.00 456.00 254.50 45.00 0.50 1960.50
1949 0.00 0.00 16.00 233.50 394.50 540.00 690.50 647.90 a 573.00 189.50 g 108.00 0.00 3203.40
1950 3.00 26.00 40.00 178.00 346.00 490.50 699.50 631.50 425.00 254.50 159.50 44.50 3298.00
1951 1.00 26.00 54.50 206.50 334.00 520.50 707.50 653.00 596.54 d 152.86 b 63.00 3.00 3318.40
1952 0.00 0.50 6.50 156.50 352.50 435.50 806.00 640.50 532.50 373.00 14.50 1.50 3319.50
1953 20.00 16.59 a 31.00 145.00 169.00 376.00 727.00 600.00 636.50 218.00 96.00 16.50 3051.59
1954 0.50 15.00 17.00 223.00 450.00 472.50 747.00 581.00 421.50 243.00 75.50 0.50 3246.50
1955 0.00 4.00 31.00 a 29.00 324.50 520.50 645.00 708.00 492.00 287.00 81.50 23.00 3145.50
1956 0.50 0.00 56.00 144.00 334.00 501.00 748.00 611.00 512.00 246.97 a 55.00 8.00 3216.47
1957 0.00 22.00 52.00 123.50 300.50 597.50 688.50 561.50 553.00 169.50 20.50 0.50 3089.00
1958 0.00 38.50 4.50 105.50 433.00 506.00 711.50 837.50 0.00 z 353.40 a 94.00 36.00 3119.90
1959 26.57 c 1.00 53.50 209.50 269.50 590.50 837.00 674.00 435.00 325.50 19.50 1.00 3442.57
1960 0.00 c 6.65 e 94.55 a 134.00 251.50 580.96 d 783.50 635.50 514.50 205.50 15.50 f 0.00 3206.66
1961 4.50 12.50 20.00 105.50 167.50 474.50 f 671.50 715.87 d 424.50 177.50 f 15.52 a 1.50 2138.89
1962 1.50 0.00 7.50 229.50 250.00 522.50 699.00 637.00 543.50 272.50 84.00 25.00 3272.00
1963 5.00 103.00 16.50 59.50 392.50 481.50 592.50 596.00 584.50 314.50 57.00 11.50 3214.00
1964 0.00 0.00 34.00 98.00 286.00 441.50 706.50 0.00 z 413.50 357.00 43.50 37.00 2417.00
1965 0.00 4.00 23.00 155.00 263.50 507.50 693.00 640.50 365.00 341.00 70.00 3.50 3066.00
1966 4.50 4.50 92.50 215.50 461.00 513.00 638.50 782.50 529.00 293.50 93.00 1.50 3629.00
1967 1.00 10.00 16.00 1.00 340.50 503.00 772.00 834.42 a 610.50 311.00 136.50 4.00 3539.92
1968 0.00 z 32.50 67.50 141.00 304.50 587.50 813.50 611.00 502.00 277.50 44.50 4.00 3385.50
1969 0.00 0.00 33.50 122.50 466.50 556.50 764.50 726.00 563.00 145.00 63.50 24.50 3465.50
1970 28.00 18.50 58.00 74.50 361.00 571.50 741.50 678.00 445.20 e 77.00 i 44.50 0.00 z 3020.70
1971 0.00 u 9.50 0.00 r 48.00 e 164.54 e 0.00 z 756.92 a 698.69 e 406.50 125.50 l 8.00 q 0.00 m 2084.15
1972 0.00 e 1.00 i 124.00 g 78.89 c 330.48 c 435.50 i 757.20 d 557.00 f 412.20 e 158.00 k 0.00 m 0.00 z 1578.77
1973 0.00 n 0.50 k 0.00 z 76.00 o 265.00 i 282.00 o 388.00 n 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1974 0.00 z 0.00 h 43.00 75.00 c 297.37 d 508.50 638.00 633.50 550.50 0.00 z 0.00 z 0.00 w 2745.87
1975 0.55 c 5.25 d 16.05 c 16.15 d 220.50 i 499.62 d 689.48 b 576.71 b 605.00 c 191.00 29.50 f 1.72 d 2601.54
1976 0.00 d 3.02 e 31.00 d 43.50 g 232.50 h 398.04 b 670.24 b 404.50 f 547.00 264.03 b 100.71 b 0.00 a 2014.05
1977 0.00 b 29.12 c 17.50 j 200.56 c 124.57 d 561.50 g 744.55 c 775.55 c 433.80 e 191.50 k 45.00 e 12.50 w 2353.16
1978 0.50 n 3.92 c 156.72 d 94.66 a 327.57 a 516.67 c 775.00 730.71 c 450.56 c 365.80 a 52.22 c 2.50 m 3473.82
1979 1.60 b 2.33 d 69.75 c 115.50 417.97 b 528.62 a 747.62 a 664.50 632.59 a 344.32 c 22.50 b 8.02 b 3555.31
1980 4.50 26.31 b 1.55 a 195.50 304.63 e 393.75 b 768.11 d 663.92 a 533.89 c 310.50 59.00 j 19.52 d 3222.18
1981 26.57 c 25.50 34.44 d 189.11 b 0.00 z 642.41 a 736.25 a 827.46 e 0.00 z 0.00 z 66.00 h 43.06 d 2524.80
1982 3.00 31.50 20.50 j 82.50 360.00 504.50 705.50 730.50 452.50 99.00 k 0.00 1.00 2871.00
1983 5.00 8.00 34.50 32.50 347.50 479.00 583.00 694.00 511.00 310.50 42.00 10.33 a 3057.33
1984 4.02 d 0.00 z 42.50 r 113.50 445.00 496.00 881.50 742.50 561.00 163.50 23.00 0.00 3430.02
1985 0.00 0.00 6.50 224.50 294.50 a 618.50 807.00 673.50 377.00 205.50 39.00 2.00 3248.00
1986 32.50 61.50 142.00 136.00 347.50 590.00 670.00 757.50 309.00 240.00 54.50 7.00 3347.50
1987 2.50 11.00 32.00 252.50 398.50 597.00 615.50 731.00 555.00 382.00 64.00 26.00 3667.00
1988 1.00 17.00 47.00 170.00 254.50 541.50 833.50 792.50 516.50 412.00 62.00 4.00 3651.50
1989 0.00 8.00 58.00 239.50 291.50 544.50 669.50 583.00 449.50 199.00 46.00 1.00 3089.50
1990 8.50 0.00 61.00 239.00 261.00 455.00 762.00 720.00 509.50 277.50 28.50 0.50 3322.50
1991 0.00 35.00 6.00 91.50 209.00 435.00 788.50 712.00 608.00 367.00 89.50 0.50 3342.00
1992 0.00 27.00 66.00 214.50 530.50 574.50 709.00 786.00 535.00 311.50 54.31 a 0.00 3808.31
1993 0.00 0.00 47.00 109.00 365.50 455.00 661.00 658.00 501.50 291.00 21.50 2.50 3112.00
1994 7.00 0.00 73.50 151.50 351.00 509.50 843.50 685.00 499.50 165.00 8.00 0.00 3293.50
1995 4.00 58.00 21.50 92.50 253.00 463.50 667.50 647.00 534.00 281.50 106.00 49.50 3178.00
1996 4.00 41.50 44.43 a 155.50 307.50 572.50 873.50 756.50 444.00 261.50 69.00 7.23 a 3537.17
1997 14.00 7.50 126.50 132.50 439.00 521.00 718.00 704.50 505.50 182.00 69.00 0.00 3419.50
1998 1.50 0.00 66.50 112.50 130.50 454.50 782.50 746.50 552.50 152.50 17.50 2.00 3019.00
1999 3.74 b 0.50 24.05 b 108.00 298.50 507.60 e 0.00 z 657.72 a 561.21 a 317.75 a 115.34 a 1.00 2595.41
2000 0.00 b 5.70 a 48.00 177.41 a 361.50 620.50 656.50 735.00 464.50 220.00 9.50 1.00 3299.61
2001 0.00 3.63 a 117.50 105.50 528.50 576.00 743.50 763.00 229.00 s 362.00 75.50 0.00 3275.13
2002 3.50 16.50 49.50 180.50 300.50 589.00 849.00 707.50 538.50 214.00 25.50 3.50 3477.50
2003 21.00 9.50 63.00 47.00 332.50 611.50 843.50 693.50 596.50 368.50 15.00 4.50 3606.00
2004 0.00 0.50 170.00 165.00 332.00 559.50 779.50 733.00 486.50 237.00 34.00 3.50 3500.50
2005 0.00 c 0.00 58.50 107.50 326.00 406.50 863.50 751.50 418.50 243.00 65.00 0.00 z 3240.00
2006 1.50 7.00 4.50 126.00 425.50 671.00 858.50 681.00 524.00 197.00 64.00 13.50 3573.50
2007 0.00 12.50 110.00 158.50 392.00 563.00 813.00 734.50 455.50 200.50 70.00 7.00 3516.50
2008 0.00 0.00 12.50 109.50 333.50 537.50 780.50 809.00 562.50 280.00 71.00 7.00 3503.00
2009 0.00 7.00 43.50 133.00 450.00 495.50 803.50 733.50 630.52 a 189.00 60.50 0.00 3546.02
2010 0.00 7.00 48.50 75.50 146.50 519.50 809.00 648.00 519.00 311.15 d 96.00 9.00 3189.15
2011 8.86 c 8.52 e 21.50 73.27 d 188.14 b 487.24 a 722.30 a 707.32 a 641.38 a 73.50 v 7.80 e 0.00 d 2866.32
2012 4.02 d 11.39 a 30.40 e 193.89 c 252.00 j 246.00 p 742.00 824.60 a 631.50 323.50 87.41 a 12.00 2860.72
2013 14.50 0.00 99.00 4.50 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 113.50
Period of Record Statistics
MEAN 4.84 13.16 52.37 139.67 321.89 509.01 726.93 669.27 479.69 248.98 54.40 8.68 3221.70
S.D. 8.43 17.82 44.39 64.24 101.66 88.30 81.10 102.63 95.66 86.70 35.50 13.27 323.90
SKEW 2.87 2.48 1.45 0.11 0.00 -0.02 -0.09 0.54 -0.69 -0.13 0.67 2.55 -0.94
MAX 49.50 103.00 237.67 283.00 559.00 758.50 938.50 1138.50 641.38 485.50 159.50 76.50 3808.31
MIN 0.00 0.00 0.00 0.00 59.50 281.00 499.00 364.00 166.50 8.00 0.00 0.00 2204.50
NO YRS 89 90 91 94 89 91 94 90 89 85 87 89 58