SAINT HELENA, CALIFORNIA

Monthly Total Growing Degree Days

(047643)

Base Temperature = 50 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
1931 0.00 z 30.00 i 182.00 272.50 413.00 475.00 686.00 571.00 402.50 234.00 107.50 2.00 3345.50
1932 28.00 50.00 171.05 c 137.00 387.00 537.50 488.50 g 616.00 537.00 325.00 237.93 a 7.20 c 3033.68
1933 0.00 7.00 100.50 188.00 189.62 a 419.50 633.50 621.00 459.00 415.50 189.00 27.00 3249.62
1934 49.50 35.50 273.00 259.50 418.00 470.50 583.50 605.00 491.00 332.00 130.00 32.50 3680.00
1935 11.00 29.00 38.00 182.00 306.00 587.00 576.50 592.50 466.50 289.00 84.00 12.50 3174.00
1936 38.50 49.50 163.50 199.14 a 394.50 525.50 625.50 655.00 513.00 374.00 101.00 6.50 3645.64
1937 0.00 7.50 106.00 113.00 393.50 505.86 a 639.00 629.00 488.00 382.50 161.00 77.00 3502.36
1938 7.00 42.50 40.50 151.00 400.00 530.50 634.00 582.50 535.50 287.50 91.00 47.50 3349.50
1939 9.00 28.00 119.00 318.50 412.00 520.00 665.50 612.50 589.50 355.50 136.50 61.50 3827.50
1940 70.00 82.00 156.50 240.00 437.00 585.50 602.50 605.00 454.00 350.00 89.00 74.00 3745.50
1941 33.50 67.00 156.00 159.00 381.50 480.50 676.50 598.00 501.00 293.00 152.50 43.50 3542.00
1942 33.50 26.50 73.50 159.00 277.00 530.50 657.00 611.50 456.50 334.50 89.00 29.00 3277.50
1943 48.00 69.50 125.50 238.50 452.00 434.50 623.50 598.50 566.50 318.00 134.50 38.00 3647.00
1944 10.00 15.50 142.00 116.00 368.00 451.50 595.00 617.00 573.50 352.50 43.50 43.00 3327.50
1945 4.00 57.00 45.00 262.50 293.47 a 568.50 700.00 605.00 547.50 375.00 94.00 34.50 3586.47
1946 12.00 11.85 b 73.00 214.00 350.00 470.50 659.50 612.00 521.00 290.00 59.50 22.50 3295.85
1947 6.00 66.50 142.00 302.00 462.50 541.50 597.00 593.00 566.50 326.50 55.50 9.00 3668.00
1948 62.50 32.00 22.50 98.50 260.00 510.00 602.00 583.50 493.00 329.00 99.50 1.00 3093.50
1949 0.00 16.00 64.00 281.50 362.50 544.00 611.50 558.00 555.00 295.00 196.00 9.00 3492.50
1950 27.00 44.00 65.50 261.50 395.00 478.00 680.50 696.00 539.50 337.00 225.00 55.00 3804.00
1951 15.50 55.50 133.50 185.00 396.00 490.00 623.50 593.50 526.00 314.50 116.00 16.50 3465.50
1952 10.00 36.50 87.50 231.00 404.00 403.50 686.50 631.50 580.00 375.50 85.50 19.93 c 3551.43
1953 72.00 55.00 94.00 175.86 a 244.00 441.50 674.00 571.00 580.50 317.00 130.00 34.50 j 3354.86
1954 14.00 51.50 41.50 257.00 404.11 c 504.64 b 488.00 i 528.50 472.00 308.00 96.50 13.00 2690.75
1955 1.00 16.69 b 96.50 66.00 396.50 482.50 462.00 g 596.20 c 551.00 364.50 150.00 60.00 2780.89
1956 15.50 12.00 87.50 179.48 a 354.95 a 530.36 b 512.00 g 594.00 528.00 293.50 167.50 25.00 2787.79
1957 3.74 b 96.00 111.00 233.28 a 328.17 b 620.89 b 648.50 593.50 528.00 272.28 a 64.50 14.50 3514.37
1958 21.00 110.00 23.00 223.50 412.50 517.00 643.50 726.43 a 645.50 437.62 a 190.00 107.50 4057.55
1959 46.00 11.50 o 188.21 c 350.00 224.00 k 618.62 a 711.00 654.74 b 521.50 412.50 f 143.00 27.50 3260.58
1960 22.50 51.62 d 160.50 217.50 349.50 633.00 692.50 641.24 d 527.68 b 351.13 e 74.50 23.00 3744.67
1961 27.42 e 71.00 62.00 g 238.00 280.00 403.00 j 742.89 c 689.00 524.50 388.65 d 103.00 19.50 3083.96
1962 66.00 31.50 45.50 307.00 315.50 514.50 591.50 624.50 489.50 354.00 149.50 51.50 3540.50
1963 9.50 166.50 48.50 92.50 337.00 493.00 586.50 641.00 609.00 363.00 90.00 6.50 3443.00
1964 3.50 65.00 87.00 194.00 280.50 475.00 652.50 652.00 528.00 448.00 79.50 94.00 3559.00
1965 8.00 33.00 81.50 206.00 345.00 422.50 594.00 647.50 415.00 448.00 136.50 0.00 3337.00
1966 23.00 15.00 141.50 344.50 387.00 572.50 567.00 677.00 544.50 404.50 138.00 21.00 3835.50
1967 38.00 51.00 52.50 3.50 372.50 467.50 666.50 696.50 600.50 432.00 217.50 59.00 3657.00
1968 19.50 149.00 135.50 259.50 337.50 582.00 651.00 599.50 576.50 338.00 102.00 7.00 3757.00
1969 16.00 12.50 111.50 154.50 442.00 476.50 646.50 699.00 573.00 315.50 130.00 60.50 3637.50
1970 61.50 83.00 171.00 137.50 450.50 507.50 659.00 579.50 571.50 274.00 151.50 20.00 3666.50
1971 29.00 37.00 76.50 133.00 279.00 489.00 637.50 670.50 545.50 258.00 81.00 2.50 3238.50
1972 4.50 57.50 217.00 188.00 383.00 540.50 680.50 616.00 454.50 298.00 38.50 19.50 3497.50
1973 21.00 48.50 39.50 243.50 441.50 615.00 639.50 574.00 526.50 356.00 82.50 21.50 3609.00
1974 52.00 19.50 111.00 164.00 376.50 559.50 662.50 648.00 532.00 395.50 84.50 17.50 3622.50
1975 5.50 42.00 71.50 78.00 436.50 501.00 591.00 613.50 526.00 271.00 53.00 29.50 3218.50
1976 31.50 48.50 86.50 154.00 459.00 559.50 647.50 568.50 518.00 403.00 213.50 19.50 3709.00
1977 7.00 71.00 54.50 286.00 246.50 582.00 661.00 689.00 506.00 373.50 142.50 71.50 3690.50
1978 32.00 55.00 215.50 142.50 467.00 550.50 667.00 617.00 537.00 438.00 82.00 1.50 3805.00
1979 10.00 4.85 b 133.00 167.50 414.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 729.35
1980 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 186.50 68.64 c 255.14
1981 0.00 z 78.50 103.33 a 306.00 485.00 0.00 z 665.50 757.50 609.50 295.00 188.00 61.47 b 3549.80
1982 1.00 98.50 52.00 215.00 444.50 459.50 614.50 0.00 z 539.50 372.50 51.00 16.00 2864.00
1983 10.00 84.50 110.50 160.00 414.00 576.00 649.00 677.00 610.50 431.50 71.50 69.00 3863.50
1984 100.48 b 28.00 220.50 200.50 548.50 572.50 744.00 667.00 0.00 z 301.00 0.00 z 0.00 z 3382.48
1985 2.00 139.00 76.00 373.00 0.00 z 0.00 z 758.00 602.50 451.00 367.50 99.00 13.50 2881.50
1986 0.00 z 139.50 0.00 z 254.00 0.00 z 580.00 644.50 655.00 397.00 393.50 186.00 14.00 3263.50
1987 0.00 z 63.50 112.00 379.50 518.73 a 0.00 z 0.00 z 0.00 z 567.00 0.00 z 0.00 z 0.00 z 1640.73
1988 0.00 z 0.00 z 0.00 z 263.00 399.50 535.50 0.00 z 666.00 566.00 408.50 100.50 78.00 3017.00
1989 12.50 23.00 126.00 354.50 414.50 534.50 703.50 634.00 487.00 319.50 143.50 22.00 3774.50
1990 16.50 35.50 153.00 363.50 0.00 z 590.50 705.00 682.00 586.50 451.00 142.50 10.50 3736.50
1991 36.00 133.00 49.50 197.50 352.00 494.50 0.00 z 613.50 603.10 a 475.50 188.50 14.00 3157.10
1992 0.00 121.50 148.00 342.50 574.00 543.50 705.00 0.00 z 598.00 468.50 169.00 3.00 3673.00
1993 9.50 27.00 218.50 222.41 a 405.50 634.00 689.00 717.00 575.50 414.50 116.00 19.50 4048.41
1994 26.50 5.00 194.50 277.00 407.50 576.50 598.50 683.00 558.50 361.00 18.00 2.00 3708.00
1995 64.00 144.50 104.50 228.00 343.50 536.50 714.50 734.50 589.50 466.00 250.00 71.00 4246.50
1996 29.00 132.00 173.50 279.00 446.00 605.00 799.50 756.00 550.00 394.50 179.50 75.50 4419.50
1997 55.50 96.50 232.00 331.50 584.50 629.00 708.00 703.00 667.50 393.00 161.00 31.00 4592.50
1998 42.50 21.50 162.50 205.50 0.00 z 465.50 0.00 z 707.00 585.00 334.50 51.00 24.00 2599.00
1999 24.50 21.50 44.00 221.38 a 342.00 501.50 598.00 619.48 a 561.00 424.38 b 180.00 0.00 z 3537.74
2000 53.73 a 81.00 197.37 a 317.22 c 455.38 b 617.00 618.97 a 668.50 594.83 a 350.00 71.50 45.50 4071.00
2001 10.00 42.00 248.50 191.38 a 625.17 a 623.79 a 644.50 666.50 548.28 a 490.00 201.00 29.00 4320.12
2002 31.00 116.00 151.50 273.00 385.50 603.50 673.00 643.00 569.50 389.00 199.00 44.00 4078.00
2003 125.50 68.00 212.50 114.50 413.50 590.50 744.00 661.00 630.50 490.32 a 67.50 41.00 4158.82
2004 36.50 35.50 h 363.50 318.50 438.00 462.00 g 631.00 698.50 634.20 e 330.50 113.50 42.00 3606.20
2005 0.00 z 86.00 210.00 213.00 407.50 509.00 745.00 663.50 492.50 392.50 210.50 78.50 4008.00
2006 39.00 123.00 24.00 191.00 456.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 833.50
Period of Record Statistics
MEAN 26.98 59.04 122.91 220.77 393.63 530.80 655.77 638.14 539.80 362.01 126.57 33.35 3673.46
S.D. 24.77 40.47 67.83 78.55 78.67 58.05 49.16 49.13 55.46 59.80 54.18 25.83 323.66
SKEW 1.50 0.82 0.80 -0.08 0.22 -0.03 0.50 0.37 -0.37 0.23 0.27 0.79 0.70
MAX 125.50 166.50 363.50 379.50 625.17 634.00 799.50 757.50 667.50 490.32 250.00 107.50 4592.50
MIN 0.00 4.85 22.50 3.50 189.62 403.50 567.00 528.50 397.00 234.00 18.00 0.00 3093.50
NO YRS 69 71 72 75 70 68 65 70 72 71 72 70 51