PASADENA, CALIFORNIA

Monthly Total Growing Degree Days

(046719)

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 509.50 384.22 a 355.00 521.50 652.50 761.50 0.00 z 956.50 713.00 614.50 436.50 438.50 6343.22
1894 273.50 283.50 0.00 z 0.00 z 0.00 z 0.00 z 960.50 995.50 916.50 781.00 637.50 373.50 5221.50
1895 306.00 0.00 z 456.00 554.00 0.00 z 0.00 z 903.00 924.50 878.00 0.00 z 0.00 z 0.00 z 4021.50
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 656.37 e 755.50 1038.50 1027.00 927.00 705.00 525.00 390.00 6024.37
1909 395.50 300.00 406.00 594.50 644.00 834.00 963.50 1051.00 894.00 750.50 511.00 329.00 7673.00
1910 322.00 346.00 563.68 a 685.00 787.50 798.50 1046.50 980.00 957.00 833.00 534.50 486.50 8340.18
1911 409.50 251.00 516.50 505.50 645.00 734.50 964.50 928.00 767.00 666.50 559.00 345.00 7292.00
1912 477.50 481.00 346.00 437.00 686.50 784.50 915.00 872.50 808.00 630.00 610.00 350.00 7398.00
1913 291.00 308.50 454.50 564.00 665.50 755.50 916.00 972.50 927.50 707.00 502.00 347.00 7411.00
1914 355.50 424.00 615.50 614.00 606.00 763.00 921.50 1014.00 914.00 877.50 732.50 293.50 8131.00
1915 374.00 328.50 571.00 544.00 604.50 834.50 955.50 1032.50 796.00 691.00 521.00 404.00 7656.50
1916 236.50 501.50 603.98 a 597.50 608.00 738.50 943.95 a 928.50 810.50 547.50 443.50 254.50 7214.43
1917 201.50 314.50 394.00 431.50 505.50 880.50 1073.00 965.50 954.00 830.50 588.00 545.00 7683.50
1918 364.00 322.50 469.50 578.00 594.50 948.50 975.50 997.00 930.00 871.50 468.50 344.50 7864.00
1919 438.00 253.50 350.50 562.00 628.00 876.00 1044.50 1024.00 890.69 a 632.00 488.00 406.50 7593.69
1920 391.00 393.00 410.50 511.50 695.50 806.50 1050.50 1044.50 862.50 627.00 473.00 346.50 7612.00
1921 321.50 379.50 526.00 513.50 560.50 811.00 1046.00 987.00 870.00 775.50 588.00 504.00 7882.50
1922 278.50 290.50 389.05 a 465.50 711.50 870.50 997.50 1076.00 1023.00 714.00 446.00 443.00 7705.05
1923 435.03 a 371.00 550.25 a 509.00 743.00 712.00 962.00 976.50 931.50 744.00 654.00 431.00 8019.28
1924 409.50 546.50 403.00 548.50 763.00 882.93 a 997.00 980.50 983.50 678.00 663.10 a 389.50 8245.04
1925 431.50 439.00 543.50 555.00 702.15 a 872.50 1094.50 1004.50 893.50 731.00 586.50 606.50 8460.15
1926 481.50 511.50 639.50 675.00 783.00 548.50 l 1000.35 e 1042.50 853.93 b 858.38 b 743.28 a 358.16 c 7947.09
1927 436.50 393.00 467.50 545.00 741.50 816.72 a 1105.00 1044.00 890.50 686.00 f 676.50 382.00 7498.22
1928 533.00 471.50 569.50 654.00 781.50 802.50 1006.00 1021.00 1028.00 729.50 581.50 438.00 8616.00
1929 368.50 318.50 485.00 483.50 776.00 861.00 1078.50 1193.50 936.50 912.50 671.90 a 618.00 8703.40
1930 352.00 506.00 550.00 658.00 626.00 834.50 1066.00 1085.00 824.00 808.50 664.50 464.00 8438.50
1931 476.00 468.50 694.50 736.00 848.50 880.00 1197.50 1145.00 934.00 814.00 456.50 315.50 8966.00
1932 287.50 373.00 611.50 626.50 717.00 801.00 952.50 980.50 883.50 768.00 734.00 328.00 8063.00
1933 316.00 340.50 537.33 d 532.50 605.50 796.50 1018.00 1026.00 779.00 828.45 b 690.00 446.50 7916.28
1934 509.00 451.00 757.00 721.50 855.50 752.50 1081.50 1049.50 990.50 801.50 555.00 453.50 8978.00
1935 382.50 459.00 387.50 570.00 656.50 849.00 1003.00 1103.00 937.50 762.00 512.00 462.50 8084.50
1936 467.50 390.50 549.00 602.00 779.50 905.00 1111.50 1085.00 937.50 808.00 703.00 454.00 8792.50
1937 123.00 335.00 479.50 607.00 736.00 845.50 1053.50 1055.50 1012.00 847.00 588.50 568.00 8250.50
1938 525.50 370.50 459.00 584.48 a 727.00 799.00 1000.00 1106.50 1059.50 782.50 533.50 578.50 8525.98
1939 391.50 267.50 451.00 661.50 699.50 826.00 1014.00 1070.50 1067.00 848.00 683.28 a 607.50 8587.28
1940 483.50 347.50 h 592.00 639.50 812.50 823.50 1005.00 1002.00 884.50 840.50 587.00 559.50 8229.50
1941 459.00 469.00 560.50 518.50 825.00 777.00 1014.00 974.00 806.00 744.00 653.50 427.50 8228.00
1942 471.00 348.00 517.18 a 547.00 687.50 794.00 1051.00 996.50 852.50 798.00 612.50 492.50 8167.68
1943 450.50 483.00 522.00 615.50 771.00 776.00 987.50 1007.50 985.00 828.50 644.00 445.50 8516.00
1944 428.50 319.50 517.00 530.00 482.00 j 697.50 875.00 1035.50 918.50 763.50 498.00 523.00 7106.00
1945 433.50 403.50 396.00 546.00 669.50 746.00 1022.50 1087.00 1014.50 829.00 578.50 465.50 8191.50
1946 466.00 351.00 514.50 658.00 641.50 881.50 1057.00 754.50 i 1035.50 728.50 512.50 367.50 f 6846.00
1947 425.00 528.50 602.20 d 656.50 748.50 815.00 1053.00 1000.50 1012.00 800.50 488.50 447.00 8577.20
1948 493.00 364.50 401.50 584.50 681.50 767.00 944.00 956.50 964.50 786.50 576.50 336.00 7856.00
1949 149.12 b 280.56 c 424.00 651.50 706.50 870.00 982.00 815.50 f 999.50 761.00 782.50 435.50 7042.18
1950 266.00 436.00 539.50 633.50 633.00 781.50 1037.50 988.00 849.50 903.00 664.00 639.50 8371.00
1951 427.00 389.50 525.00 558.00 691.00 779.00 1040.00 1001.00 959.00 829.50 565.50 368.50 8133.00
1952 307.50 428.50 356.50 564.50 794.50 719.00 1030.00 1067.00 1056.00 829.00 482.00 397.50 8032.00
1953 554.50 457.00 515.50 500.50 674.00 773.50 1110.50 984.00 946.00 848.50 652.50 493.50 8510.00
1954 399.00 600.50 460.00 604.00 721.50 795.50 1156.00 995.50 966.00 777.00 663.00 448.50 8586.50
1955 318.50 388.00 575.00 567.00 667.00 782.50 965.50 1142.50 1041.50 745.50 571.00 420.00 8184.00
1956 436.00 303.50 585.00 537.50 716.50 892.00 1021.00 1001.50 1105.00 763.00 726.50 548.00 8635.50
1957 371.50 530.00 602.50 607.00 718.50 997.50 1125.00 1117.00 968.00 763.00 526.00 571.50 8897.50
1958 499.10 a 499.00 450.50 682.50 827.50 892.50 1028.50 1114.34 c 1092.50 1002.50 644.00 643.00 9375.94
1959 569.22 b 387.33 a 574.50 f 777.50 735.00 954.50 1189.50 1109.50 985.00 895.50 740.50 565.50 8909.06
1960 235.00 g 442.00 648.50 723.00 843.50 740.50 f 1157.50 1063.50 1108.00 841.50 547.50 526.50 7901.50
1961 615.50 545.50 570.00 695.50 693.00 901.50 1083.00 1116.50 943.00 855.00 594.81 d 463.00 9076.31
1962 497.50 356.00 428.00 770.50 695.50 812.50 978.00 1118.00 978.00 825.00 617.50 512.50 8589.00
1963 427.00 611.00 516.00 544.00 728.00 779.50 1016.50 1082.50 1130.50 874.00 621.50 559.00 8889.50
1964 434.50 484.50 524.50 590.00 690.00 797.00 1070.00 1085.50 931.50 975.00 542.50 451.50 8576.50
1965 529.00 467.50 535.00 612.50 726.50 723.50 997.50 1146.50 868.50 1005.50 593.50 458.00 8663.50
1966 431.00 400.00 628.50 735.00 768.00 905.50 1060.00 1131.00 1007.00 905.50 619.00 519.50 9110.00
1967 503.00 575.50 571.00 407.50 804.00 763.00 1120.00 1246.00 1055.00 972.50 716.50 414.50 9148.50
1968 487.50 606.50 647.00 673.00 761.00 870.00 1093.50 1040.50 1013.00 833.50 641.00 405.00 9071.50
1969 475.50 329.50 533.50 635.00 792.00 763.50 1070.50 1185.50 1020.00 803.00 698.00 538.00 8844.00
1970 465.50 556.00 595.00 588.50 818.00 893.00 1113.00 1136.00 999.00 815.00 625.50 432.50 9037.00
1971 513.00 476.00 579.00 599.50 675.00 847.50 1103.00 1209.50 1071.50 857.50 579.50 351.50 8862.50
1972 449.50 541.50 709.50 684.50 810.50 920.00 1152.00 1137.50 977.00 799.00 570.00 469.00 9220.00
1973 413.00 469.50 460.50 637.50 825.00 984.00 1037.50 1071.00 905.00 902.50 0.00 z 541.98 a 8247.48
1974 428.50 519.00 546.24 b 699.50 757.50 946.50 1092.50 1025.50 1035.00 823.00 649.66 a 449.50 8972.40
1975 521.00 403.41 a 498.00 482.50 724.50 779.50 1038.50 1019.50 1056.50 787.92 a 600.50 515.50 8427.32
1976 583.00 462.50 561.50 535.50 795.50 945.50 1032.50 1005.50 946.00 920.50 763.50 564.00 9115.50
1977 487.50 616.00 481.00 680.00 633.50 884.00 1084.00 1108.50 950.50 902.50 743.50 599.00 9170.00
1978 495.50 474.00 638.00 0.00 z 874.00 981.50 1083.00 1042.50 1035.00 964.00 542.50 401.00 8531.00
1979 363.00 402.50 0.00 z 660.50 777.00 955.00 1050.50 1038.50 1135.50 829.50 598.00 600.00 8410.00
1980 518.00 606.50 596.50 710.50 689.00 891.00 1166.50 1096.50 936.50 897.00 666.00 629.50 9403.50
1981 571.00 580.00 559.00 700.00 797.50 1094.00 1139.00 1180.00 1030.50 791.00 657.50 561.00 9660.50
1982 419.50 520.00 505.00 644.00 763.00 755.50 1103.50 1179.00 1039.50 915.00 541.50 437.50 8823.00
1983 533.50 472.50 544.50 542.00 801.00 838.50 1053.00 1181.00 1112.00 932.00 578.00 493.50 9081.50
1984 590.00 573.00 697.00 698.00 987.00 926.50 1199.50 1166.50 1225.00 811.00 526.00 379.50 9779.00
1985 420.50 466.50 527.00 772.00 769.00 981.00 1202.00 1115.50 951.00 894.00 526.00 553.50 9178.00
1986 655.00 520.00 683.00 710.00 850.00 938.00 1046.00 1158.00 843.00 852.50 721.00 524.50 9501.00
1987 453.00 501.50 582.00 836.50 863.00 929.50 973.00 1050.00 1054.00 957.50 632.00 385.00 9217.00
1988 505.00 628.50 721.50 721.50 857.00 884.50 1114.50 1053.50 999.50 946.50 603.50 440.00 9475.50
1989 418.00 419.50 666.50 810.50 778.50 883.50 1101.00 1015.50 1043.00 836.50 682.50 547.50 9202.50
1990 498.00 408.00 599.00 701.50 764.00 984.00 1155.00 1055.50 1060.00 996.50 708.00 440.50 9370.00
1991 521.00 664.50 478.50 718.50 779.00 852.50 1022.00 1097.00 1100.50 1047.50 762.00 533.50 9576.50
1992 554.00 600.00 585.00 845.00 873.00 920.00 1117.00 1229.50 1089.50 924.50 649.00 393.50 9780.00
1993 404.50 438.00 701.50 782.00 892.00 980.00 1012.50 1086.50 1052.00 939.00 651.00 495.00 9434.00
1994 572.50 439.00 675.50 710.00 742.50 1007.50 1013.00 1241.00 1046.00 848.50 471.50 475.00 9242.00
1995 419.50 621.00 597.50 653.00 700.50 867.00 1113.50 1194.00 1139.00 954.50 735.50 523.50 9518.50
1996 529.50 555.50 659.00 822.50 885.00 989.50 1133.00 1164.00 981.50 819.00 631.50 496.50 9666.50
1997 494.50 553.50 753.00 737.50 975.50 930.00 1074.50 1204.50 1201.00 936.50 675.00 468.00 9999.00
1998 495.00 405.50 624.00 637.50 695.50 829.00 1166.50 1288.50 1000.00 851.00 595.00 477.50 9065.00
1999 523.00 499.00 516.00 595.00 764.50 876.00 1116.50 1122.72 a 1011.21 a 1065.00 662.00 564.41 b 9315.34
2000 569.00 511.64 a 639.63 a 810.50 942.00 1030.00 1096.37 a 1212.00 1073.00 800.83 a 543.62 a 624.98 c 9853.58
2001 438.50 373.33 a 658.00 625.34 a 941.88 a 1029.60 e 1075.18 a 1135.00 1055.00 918.78 b 659.46 b 459.66 b 9369.74
2002 482.00 577.50 610.00 661.50 795.50 952.00 1091.50 1072.00 1116.50 785.50 755.50 489.59 b 9389.09
2003 763.00 494.50 694.00 598.00 818.50 850.50 1193.00 1235.50 1075.00 1050.00 581.00 511.00 9864.00
2004 536.50 455.00 808.50 771.00 945.00 918.00 1108.50 1090.50 1105.50 814.00 560.00 544.50 9657.00
2005 538.00 503.00 639.08 e 704.00 666.50 j 877.50 1143.50 1145.00 773.50 g 874.00 733.50 574.00 7731.58
2006 557.00 567.50 474.50 606.00 859.00 1073.00 1315.00 1112.50 1062.50 859.00 761.00 410.50 f 9247.00
2007 470.00 532.00 733.67 a 699.60 e 820.50 931.50 1153.50 1202.50 1021.00 925.00 708.00 453.50 9650.77
2008 453.50 508.00 704.00 772.50 827.50 1042.50 1113.50 1179.50 1109.00 1077.50 812.00 487.00 9999.00
2009 669.50 490.50 662.50 737.50 937.50 862.00 1197.50 1182.50 1196.00 914.00 736.50 495.00 9999.00
2010 574.50 531.50 699.50 653.50 795.00 923.50 1062.50 1144.50 1100.00 892.00 667.00 563.50 9607.00
2011 631.88 a 420.00 633.50 748.00 791.50 867.50 1122.00 1173.50 1076.00 955.50 631.55 a 510.50 9561.43
2012 659.00 548.00 633.00 750.00 886.50 944.00 1100.50 1302.00 1245.00 999.50 720.00 497.50 9999.00
2013 514.50 485.50 731.00 19.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 8.50 z 1731.00
Period of Record Statistics
MEAN 451.87 450.47 556.96 632.06 752.82 861.69 1059.61 1079.25 986.32 837.59 616.39 471.72 8778.42
S.D. 106.10 96.68 102.16 94.98 93.30 86.04 76.37 86.30 102.03 100.19 87.33 84.50 730.23
SKEW -0.36 -0.05 -0.01 0.07 0.16 0.38 0.20 0.27 -0.08 -0.08 -0.03 -0.10 -0.16
MAX 763.00 664.50 808.50 845.00 987.00 1094.00 1315.00 1302.00 1245.00 1077.50 812.00 643.00 10285.00
MIN 123.00 251.00 346.00 407.50 505.50 697.50 875.00 872.50 713.00 547.50 436.50 254.50 7214.43
NO YRS 107 106 105 105 104 104 107 106 107 106 106 105 91