PETRIFIED FOREST NP, ARIZONA

Monthly Total Heating Degree Days

(026468)

Base Temperature = 65 F

File last updated on Apr 3, 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
1931 1152.00 690.00 667.03 b 319.00 135.22 b 7.50 0.00 3.00 13.50 277.00 822.00 1309.50 5395.76
1932 1156.00 716.00 633.00 356.00 124.50 63.00 0.00 0.00 27.50 346.50 656.38 a 1305.00 5383.88
1933 1402.50 923.50 583.50 481.00 257.00 10.50 0.00 0.00 0.00 209.50 617.00 833.50 5318.00
1934 903.00 611.00 370.50 242.50 58.00 16.00 0.00 0.00 50.50 220.00 605.00 914.50 3991.00
1935 925.00 723.00 671.50 419.50 291.00 12.00 0.00 0.00 63.00 323.50 756.50 981.50 5166.50
1936 949.00 764.00 666.50 332.00 101.50 32.00 0.00 0.00 61.00 264.00 715.00 949.00 4834.00
1937 1559.00 867.00 707.00 425.00 139.50 26.00 6.50 0.00 7.00 216.00 549.00 809.50 5311.50
1938 878.50 678.00 609.00 349.00 207.50 0.00 0.00 0.00 s 0.00 k 258.00 805.00 849.40 a 4634.40
1939 948.71 b 950.44 a 430.50 269.00 83.00 5.50 0.00 0.00 a 16.50 298.50 573.50 813.00 4388.65
1940 916.00 742.50 548.00 368.50 68.72 a 1.00 0.00 3.50 15.00 a 247.50 723.10 a 845.50 4479.32
1941 902.50 620.50 610.00 492.41 a 161.00 39.50 0.00 0.00 53.50 350.50 640.50 872.00 4742.41
1942 983.00 840.00 749.50 385.50 203.50 5.50 0.00 0.00 26.00 288.50 520.00 793.50 4795.00
1943 849.00 641.50 555.50 237.50 102.30 a 15.00 0.00 0.00 27.50 241.00 632.50 926.00 4227.80
1944 1017.50 753.50 716.00 459.00 153.00 27.00 0.00 0.00 19.66 a 185.00 675.50 894.50 4900.66
1945 930.00 636.50 706.50 430.00 124.00 36.50 0.00 0.00 56.00 202.00 668.50 1081.00 4871.00
1946 1064.00 737.00 532.00 212.50 132.00 0.50 0.00 0.00 25.00 349.00 698.50 793.00 4543.50
1947 1029.50 644.50 576.00 372.50 94.50 9.50 0.00 0.00 8.50 249.00 762.00 1001.00 4747.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 6.50 244.00 758.50 845.00 1854.00
1949 1133.50 793.00 621.00 324.50 141.00 29.50 0.00 1.00 0.00 a 380.86 c 540.52 a 1001.50 4966.37
1950 862.00 613.41 a 590.50 274.00 171.00 14.00 0.00 d 0.00 36.00 54.00 529.50 758.50 3902.91
1951 885.00 741.50 645.00 366.00 108.50 d 37.24 a 0.00 4.00 0.00 a 265.00 673.00 903.00 4628.24
1952 854.00 764.50 772.00 356.00 94.50 8.50 0.00 0.00 20.00 156.55 a 878.00 974.00 4878.05
1953 773.50 760.50 581.77 a 373.50 275.50 12.00 0.00 0.00 0.00 f 283.43 c 580.50 1060.00 4700.70
1954 657.50 f 622.50 655.00 223.00 72.50 19.66 a 0.00 0.00 10.00 211.00 546.50 939.50 3299.66
1955 1007.00 877.50 627.00 427.00 158.10 a 36.50 0.00 0.00 18.50 184.40 b 616.00 738.00 4690.00
1956 713.00 933.50 576.50 401.50 78.00 0.00 a 0.00 0.00 0.00 227.50 839.00 996.00 4765.00
1957 796.50 510.00 584.50 406.00 245.42 a 12.50 0.00 0.00 f 17.59 a 292.00 736.50 826.15 a 4427.15
1958 927.00 604.50 712.48 a 396.50 77.00 0.00 0.00 0.00 41.00 225.50 663.62 a 792.57 a 4440.17
1959 872.65 a 728.00 393.50 l 267.50 134.85 a 1.00 0.00 0.00 33.00 287.50 656.25 b 903.50 3884.25
1960 1174.00 834.50 489.00 308.79 a 157.50 1.00 0.00 a 0.00 15.00 343.00 586.03 a 1135.24 b 5044.07
1961 994.50 693.00 626.72 a 381.72 a 143.24 b 12.50 0.00 a 0.00 a 68.28 a 336.50 682.00 1072.50 5010.96
1962 1082.00 739.50 778.00 280.86 a 220.62 a 30.50 0.00 b 0.00 44.50 257.00 523.45 a 895.00 4851.43
1963 1092.00 662.00 622.50 403.50 60.50 25.50 0.00 0.00 0.50 152.50 594.83 a 1035.50 4649.33
1964 1039.50 909.00 765.00 475.34 a 168.43 a 5.00 0.00 0.00 58.00 193.50 722.50 846.50 5182.78
1965 860.50 818.74 a 720.50 403.50 239.00 38.00 0.00 0.00 78.00 256.00 525.00 855.08 a 4794.32
1966 1064.33 a 862.50 584.50 339.31 a 52.00 6.00 0.00 0.00 5.50 298.50 517.50 969.50 4699.64
1967 1022.00 723.50 503.75 a 420.00 207.59 c 18.10 a 0.00 0.00 9.00 228.50 531.50 1189.50 4853.44
1968 1245.50 655.00 609.50 465.50 185.50 34.00 1.50 7.00 59.50 288.50 678.50 1058.50 5288.50
1969 808.00 746.00 788.50 347.50 144.00 7.00 0.00 0.00 12.50 390.50 683.50 821.00 4748.50
1970 956.00 637.00 726.00 564.00 133.50 40.50 0.00 0.00 67.50 441.00 605.00 885.00 5055.50
1971 1021.50 791.00 634.50 441.50 249.07 b 36.00 0.00 a 0.00 80.17 a 405.00 661.50 998.00 5318.24
1972 891.00 695.50 463.40 b 344.50 175.00 11.00 0.00 1.00 22.00 279.50 765.00 968.00 4615.90
1973 1034.00 739.00 744.00 512.00 153.50 26.50 0.00 0.00 49.50 265.50 594.50 892.00 5010.50
1974 968.50 801.00 518.00 413.00 66.28 b 3.50 0.00 0.00 47.50 252.50 673.00 1018.50 4761.78
1975 1059.00 802.00 688.00 532.50 256.86 c 15.50 0.00 0.00 32.50 281.50 701.50 1029.50 5398.86
1976 982.50 639.00 702.00 405.50 126.00 5.50 0.00 0.00 d 32.00 402.50 720.50 1025.50 5041.00
1977 1144.50 754.50 713.00 363.50 223.50 0.00 0.00 a 0.00 8.50 i 222.17 a 465.00 g 739.35 a 4160.52
1978 822.00 744.00 525.00 364.00 179.80 a 3.00 0.00 0.00 46.00 216.50 620.50 1144.00 4664.80
1979 1033.50 767.00 696.00 383.50 203.05 a 28.50 0.00 4.00 4.00 216.00 778.50 954.50 5068.55
1980 849.50 679.00 671.00 397.50 244.00 12.50 0.00 0.00 15.00 366.50 657.50 777.00 4669.50
1981 806.50 674.00 656.00 261.50 135.00 5.00 0.00 1.50 4.00 311.07 b 534.00 793.50 4182.07
1982 983.22 a 699.50 602.00 349.00 190.00 16.00 0.00 0.00 30.50 398.50 654.50 903.00 4826.22
1983 947.00 692.00 616.50 517.00 243.00 16.50 0.00 0.00 25.50 212.00 613.00 772.50 4655.00
1984 958.50 802.00 614.50 422.00 60.50 3.50 0.00 0.00 28.50 432.50 604.00 879.00 4805.00
1985 932.50 775.50 585.00 289.00 94.00 10.00 0.00 0.00 97.00 260.00 647.00 908.00 4598.00
1986 772.00 644.00 489.50 316.00 135.50 4.50 0.00 0.00 65.00 369.50 609.50 894.00 4299.50
1987 1058.50 740.00 705.50 288.50 137.00 0.00 0.00 0.00 24.00 181.00 672.00 965.50 4772.00
1988 985.00 680.00 617.50 365.00 148.50 7.50 0.00 0.00 52.00 155.00 590.50 932.50 4533.50
1989 986.00 708.00 435.50 184.00 84.00 4.50 0.00 0.00 25.50 288.00 646.00 953.50 4315.00
1990 930.50 773.50 556.50 272.00 124.50 5.50 0.00 0.50 10.50 278.50 627.00 1136.00 4715.00
1991 947.50 630.00 675.50 414.00 170.00 32.50 0.00 0.00 6.00 221.00 661.00 938.00 4695.50
1992 1240.50 679.50 556.50 234.00 102.50 5.00 0.50 8.00 5.00 206.50 778.50 1085.00 4901.50
1993 787.50 675.50 564.00 330.00 102.50 29.00 0.00 0.00 43.00 313.00 708.50 928.00 4481.00
1994 921.00 728.50 534.50 332.50 134.50 0.00 0.00 0.00 12.50 318.50 703.50 837.50 4523.00
1995 857.50 575.00 538.50 434.00 225.00 22.00 0.00 0.00 17.50 284.50 505.00 303.50 p 3459.00
1996 849.00 575.50 586.50 304.50 53.00 0.00 0.00 0.00 76.50 324.50 637.50 832.50 4239.50
1997 935.50 751.50 520.00 432.50 62.50 14.50 0.00 0.00 3.00 358.00 603.50 1056.50 4737.50
1998 846.50 781.00 652.00 492.50 171.00 31.50 0.00 0.00 5.00 284.00 590.00 888.00 4741.50
1999 805.00 636.00 473.50 265.50 o 163.78 a 20.36 b 0.00 a 0.00 b 17.50 0.00 z 493.00 945.00 3554.14
2000 728.00 574.00 570.00 200.50 48.50 0.00 0.00 0.00 15.50 268.00 788.50 845.00 4038.00
2001 907.50 614.50 471.00 260.00 36.00 6.21 a 0.00 0.00 1.50 156.50 518.00 992.00 a 3963.21
2002 896.93 a 730.00 608.50 179.50 108.50 2.00 0.00 0.00 49.50 359.50 691.00 1111.00 4736.43
2003 922.00 783.50 688.00 486.50 151.00 13.50 0.00 0.00 37.00 128.50 614.50 866.97 a 4691.47
2004 921.00 819.00 391.50 335.50 63.00 4.00 0.00 0.00 63.50 299.50 648.00 921.50 4466.50
2005 745.00 648.50 608.00 346.00 111.00 10.50 0.00 0.00 7.00 209.50 574.00 878.00 4137.50
2006 879.00 670.50 641.18 a 250.50 45.50 0.00 0.00 0.00 62.00 300.50 553.93 b 939.50 4342.61
2007 1049.50 666.50 498.50 287.50 94.50 6.00 0.00 0.00 23.00 240.00 472.50 927.42 a 4265.42
2008 987.50 769.00 590.00 379.50 198.00 6.00 0.00 0.00 1.50 273.00 583.00 848.00 4635.50
2009 871.50 648.50 537.50 379.50 33.00 11.50 0.00 0.00 z 31.00 336.50 586.50 1067.00 4502.50
2010 1018.50 753.50 641.00 340.50 180.00 7.50 0.00 0.00 4.50 231.00 704.50 735.00 4616.00
2011 1053.48 a 781.57 e 500.00 333.00 200.50 3.50 0.00 0.00 5.00 296.50 649.50 1060.95 b 4884.00
2012 826.50 741.05 a 551.00 265.50 85.50 0.00 0.00 0.00 11.50 234.00 550.00 922.00 4187.05
2013 1103.00 840.00 525.50 10.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 40.50 z 2468.50
Period of Record Statistics
MEAN 962.87 724.90 605.78 359.95 141.65 14.03 0.10 0.42 28.62 271.10 642.87 935.57 4709.43
S.D. 141.62 88.47 90.95 84.69 63.11 13.26 0.74 1.42 23.71 72.47 86.72 119.95 354.16
SKEW 1.30 0.30 -0.20 0.02 0.32 1.11 8.24 3.87 0.77 0.01 0.36 0.79 -0.12
MAX 1559.00 950.44 788.50 564.00 291.00 63.00 6.50 8.00 97.00 441.00 878.00 1309.50 5398.86
MIN 713.00 510.00 370.50 179.50 33.00 0.00 0.00 0.00 0.00 54.00 472.50 735.00 3902.91
NO YRS 81 82 81 80 81 81 82 79 79 81 81 81 72