SAINT HELENA, CALIFORNIA

Monthly Total Growing Degree Days

(047643)

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
1931 0.00 z 199.50 i 486.00 568.50 723.00 775.00 996.00 881.00 702.50 544.00 304.50 132.00 6112.50
1932 174.50 225.00 479.39 c 435.50 697.00 837.50 728.50 g 926.00 837.00 635.00 535.34 a 105.73 c 5887.97
1933 64.50 187.00 390.50 478.00 481.53 a 719.50 943.50 931.00 759.00 725.50 482.50 207.50 6370.03
1934 273.00 287.50 583.00 559.50 728.00 770.50 893.50 915.00 791.00 641.00 417.50 227.50 7087.00
1935 182.00 245.00 232.50 472.50 616.00 887.00 886.50 902.50 766.50 586.50 322.50 217.50 6317.00
1936 279.50 267.00 438.00 490.34 a 704.50 825.50 935.50 965.00 813.00 682.50 379.50 167.50 6947.84
1937 14.00 188.50 389.50 406.50 703.50 805.86 a 949.00 939.00 788.00 692.50 459.00 327.00 6662.36
1938 178.50 235.00 292.50 443.50 710.00 830.50 944.00 892.50 835.50 597.50 364.50 288.50 6612.50
1939 200.00 205.50 391.50 618.50 722.00 820.00 975.50 922.50 889.50 663.00 432.00 321.50 7161.50
1940 283.00 343.50 455.00 538.00 747.00 885.50 912.50 915.00 754.00 660.00 360.00 329.00 7182.50
1941 280.50 315.50 462.00 448.00 691.50 780.50 986.50 908.00 801.00 601.50 421.00 247.00 6943.00
1942 228.50 249.00 348.00 456.00 587.00 830.50 967.00 921.50 756.50 644.50 356.50 226.50 6571.50
1943 259.00 300.00 424.00 538.50 762.00 734.50 933.50 908.50 866.50 628.00 426.00 270.50 7051.00
1944 204.00 237.00 429.50 407.00 678.00 751.50 905.00 927.00 873.50 662.50 317.00 294.50 6686.50
1945 177.00 303.50 270.00 560.00 603.47 a 868.50 1010.00 915.00 847.50 685.00 353.50 240.00 6833.47
1946 182.50 158.31 b 349.50 505.50 660.00 770.50 969.50 922.00 821.00 586.00 322.50 219.00 6466.31
1947 96.50 309.50 442.50 599.00 772.50 841.50 907.00 903.00 866.50 635.50 314.50 168.50 6856.50
1948 303.00 198.00 262.50 362.50 570.00 810.00 912.00 893.50 793.00 636.50 362.50 104.50 6208.00
1949 32.00 151.00 343.00 581.50 672.50 844.00 921.50 868.00 855.00 598.50 496.00 153.50 6516.50
1950 116.00 261.00 329.00 558.00 699.00 778.00 990.50 1006.00 839.50 645.50 515.50 309.50 7047.50
1951 192.50 241.50 394.00 483.50 706.00 790.00 933.50 903.50 826.00 624.50 381.50 174.00 6650.50
1952 123.50 247.50 290.00 531.00 713.50 703.50 996.50 941.50 880.00 685.50 322.00 235.82 c 6670.32
1953 336.50 316.50 364.50 448.97 a 549.50 741.50 984.00 881.00 880.50 627.00 406.50 209.00 j 6536.47
1954 195.50 282.50 285.00 555.50 714.11 c 804.64 b 708.00 i 838.50 772.00 618.00 372.00 157.00 5594.75
1955 110.00 201.92 b 372.50 333.50 706.50 782.50 702.00 g 906.20 c 851.00 674.50 377.50 290.50 5606.62
1956 231.00 199.00 375.00 467.59 a 664.95 a 830.36 b 752.00 g 904.00 828.00 596.50 463.00 215.00 5774.39
1957 94.07 b 313.00 404.50 529.66 a 638.17 b 920.89 b 958.50 903.50 828.00 582.28 a 341.00 224.50 6738.07
1958 230.00 368.00 266.50 516.00 722.50 817.00 953.50 1036.43 a 945.50 747.62 a 466.50 395.00 7464.55
1959 293.00 95.00 o 491.57 c 650.00 424.00 k 918.62 a 1021.00 964.74 b 821.50 662.50 f 427.00 249.00 5836.43
1960 195.50 312.04 d 456.50 498.50 659.50 933.00 1002.50 951.24 d 827.68 b 661.13 e 339.00 216.50 7053.09
1961 209.85 e 324.00 286.50 g 519.50 590.00 603.00 j 1052.89 c 999.00 824.50 698.65 d 368.50 181.50 5768.39
1962 221.50 232.00 301.50 607.00 625.50 814.50 901.50 934.50 789.50 664.00 435.00 239.50 6766.00
1963 116.50 445.50 317.50 358.00 647.00 793.00 896.50 951.00 909.00 673.00 352.50 135.50 6595.00
1964 155.50 306.00 331.00 486.50 586.00 774.50 962.50 962.00 828.00 758.00 323.00 317.00 6790.00
1965 215.50 276.50 386.00 481.50 655.00 722.50 904.00 957.50 715.00 758.00 412.00 88.50 6572.00
1966 206.00 204.00 405.00 644.50 697.00 872.50 877.00 987.00 844.50 714.50 411.50 231.50 7095.00
1967 251.50 303.00 309.00 222.50 682.00 767.50 976.50 1006.50 900.50 742.00 494.50 218.50 6874.00
1968 173.50 417.50 434.50 559.50 647.50 882.00 961.00 909.50 876.50 648.00 374.50 147.00 7031.00
1969 131.00 167.50 368.50 445.00 752.00 776.50 956.50 1009.00 873.00 625.50 419.00 308.00 6831.50
1970 296.00 349.00 454.00 418.00 760.50 807.50 969.00 889.50 871.50 584.00 442.00 184.00 7025.00
1971 219.50 258.00 328.00 428.00 589.00 789.00 947.50 980.50 845.50 560.00 357.50 126.50 6429.00
1972 119.50 307.00 516.00 485.00 693.00 840.50 990.50 926.00 754.50 608.00 284.50 140.00 6664.50
1973 174.50 309.00 300.50 542.00 751.50 915.00 949.50 884.00 826.50 666.00 339.50 272.00 6930.00
1974 227.00 231.50 396.00 455.00 682.00 859.50 972.50 958.00 832.00 705.50 369.50 203.00 6891.50
1975 177.50 263.50 344.50 336.00 744.50 801.00 901.00 923.50 826.00 579.00 296.00 251.00 6443.50
1976 240.00 283.50 342.50 443.00 769.00 859.50 957.50 878.50 818.00 713.00 498.50 248.00 7051.00
1977 150.00 328.00 317.50 586.00 553.50 882.00 971.00 999.00 806.00 683.50 425.50 345.00 7047.00
1978 303.00 303.00 524.50 432.00 777.00 850.50 977.00 927.00 837.00 747.00 339.00 127.50 7144.50
1979 186.50 218.62 b 423.00 465.00 724.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2017.12
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 477.50 311.11 c 788.61
1981 0.00 z 328.00 396.28 a 606.00 795.00 0.00 z 975.50 1067.50 909.50 605.00 482.00 328.71 b 6493.49
1982 129.00 335.50 309.00 488.50 754.50 759.50 924.50 0.00 z 839.50 682.50 301.50 236.00 5760.00
1983 214.00 355.00 402.00 455.50 724.00 876.00 959.00 987.00 910.50 741.50 332.00 327.50 7284.00
1984 372.53 b 283.50 526.00 500.50 858.50 872.50 1054.00 977.00 0.00 z 605.00 0.00 z 0.00 z 6049.53
1985 136.00 366.50 332.00 673.00 0.00 z 0.00 z 1068.00 912.50 751.00 677.50 297.50 131.00 5345.00
1986 0.00 z 396.50 0.00 z 552.50 0.00 z 880.00 954.50 965.00 697.00 703.50 478.00 217.00 5844.00
1987 0.00 z 304.00 393.00 679.50 828.73 a 0.00 z 0.00 z 0.00 z 867.00 0.00 z 0.00 z 0.00 z 3072.23
1988 0.00 z 0.00 z 0.00 z 563.00 708.00 835.50 0.00 z 976.00 866.00 718.50 375.50 271.50 5314.00
1989 189.50 181.00 400.00 652.50 724.50 834.50 1013.50 944.00 787.00 629.50 428.00 190.50 6974.50
1990 202.50 193.50 439.00 663.50 0.00 z 890.50 1015.00 992.00 886.50 761.00 414.00 148.50 6606.00
1991 238.50 403.50 296.50 497.50 662.00 794.50 0.00 z 923.50 903.10 a 785.50 484.00 224.50 6213.10
1992 150.50 400.50 458.00 642.50 884.00 843.50 1015.00 0.00 z 898.00 778.50 454.00 131.00 6655.50
1993 192.50 244.00 528.50 522.41 a 715.50 934.00 999.00 1027.00 875.50 724.50 388.00 189.50 7340.41
1994 278.50 208.50 493.50 574.00 717.50 876.50 908.50 993.00 858.50 671.00 230.50 145.00 6955.00
1995 329.50 406.00 390.50 528.00 653.50 836.50 1024.50 1044.50 889.50 776.00 550.00 338.50 7767.00
1996 258.50 368.00 476.50 572.50 756.00 905.00 1109.50 1066.00 850.00 704.50 479.50 335.50 7881.50
1997 299.00 365.50 538.00 631.50 894.50 929.00 1018.00 1013.00 967.50 703.00 455.00 263.50 8077.50
1998 284.50 245.50 446.00 492.00 0.00 z 765.50 0.00 z 1017.00 885.00 644.50 337.50 194.50 5312.00
1999 221.00 229.50 317.50 493.45 a 652.00 801.50 908.00 929.48 a 861.00 734.38 b 472.50 0.00 z 6620.31
2000 320.33 a 354.00 493.93 a 617.22 c 765.38 b 917.00 928.97 a 978.50 894.83 a 660.00 317.50 327.00 7574.66
2001 241.00 269.00 549.50 483.10 a 935.17 a 923.79 a 954.50 976.50 848.28 a 800.00 482.50 296.50 7759.84
2002 237.00 373.00 443.00 569.00 695.50 903.50 983.00 953.00 869.50 699.00 498.50 306.00 7530.00
2003 426.00 332.00 522.00 405.00 723.50 890.50 1054.00 971.00 930.50 799.28 a 322.00 283.50 7659.28
2004 271.50 235.50 h 672.00 617.50 748.00 692.00 g 941.00 1008.50 934.20 e 639.50 400.50 270.00 6502.70
2005 0.00 z 365.00 517.50 512.50 717.50 809.00 1055.00 973.50 792.50 702.50 491.50 328.00 7264.50
2006 310.50 364.00 274.50 487.50 766.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2203.00
Period of Record Statistics
MEAN 211.69 286.58 401.56 512.47 702.99 830.80 965.77 948.14 839.80 671.01 399.03 232.48 6962.39
S.D. 77.63 69.60 88.25 87.46 79.67 58.06 49.16 49.13 55.46 60.88 70.37 72.41 418.75
SKEW -0.03 0.09 0.40 -0.39 0.15 -0.03 0.50 0.37 -0.37 0.19 0.07 -0.03 0.66
MAX 426.00 445.50 672.00 679.50 935.17 934.00 1109.50 1067.50 967.50 800.00 550.00 395.00 8077.50
MIN 14.00 151.00 232.50 222.50 481.53 703.50 877.00 838.50 697.00 544.00 230.50 88.50 6208.00
NO YRS 69 71 72 75 70 68 65 70 72 71 72 70 51