SELIGMAN 13 SSW, ARIZONA

Monthly Total Heating Degree Days

(027720)

Base Temperature = 65 F

File last updated on Apr 3, 2013
*** Note *** Provisional Data *** After Year/Month 198201
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
1962 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 28.00 321.50 569.00 812.00 1730.50
1963 1024.50 639.50 786.37 a 551.00 158.50 74.50 0.00 3.21 b 20.00 0.00 z 603.50 900.50 4761.57
1964 1027.50 952.50 870.00 539.50 279.00 60.50 0.00 7.00 89.50 244.00 808.00 931.55 a 5809.05
1965 837.00 798.50 792.00 535.00 318.50 78.50 n 0.00 4.00 160.00 282.00 569.50 921.00 5217.50
1966 516.00 q 876.00 0.00 z 603.62 a 209.25 a 46.73 d 0.00 c 0.00 19.50 344.50 613.50 942.29 b 3655.39
1967 910.50 0.00 z 823.00 720.00 0.00 z 36.50 k 0.00 a 0.00 d 44.46 b 308.93 b 521.50 1137.81 d 4466.21
1968 822.50 g 650.00 663.63 d 540.00 b 295.03 b 45.00 i 0.57 d 36.68 a 94.29 b 249.00 618.60 e 812.00 g 3147.81
1969 772.13 d 818.42 d 830.50 468.50 178.25 e 30.50 1.00 0.00 a 56.00 320.50 i 668.33 c 810.50 4634.13
1970 751.50 f 499.50 h 740.38 a 684.64 b 206.48 c 69.50 1.50 0.00 160.50 0.00 z 514.50 f 969.04 d 2832.05
1971 931.50 806.81 a 690.00 515.50 0.00 z 79.29 b 0.00 0.00 c 138.50 507.88 a 741.50 1122.00 5532.98
1972 942.50 738.50 389.50 g 420.00 229.40 a 16.03 a 0.00 6.00 77.50 401.97 a 781.00 1025.50 4638.40
1973 991.50 752.00 847.00 0.00 z 214.42 a 55.00 0.00 1.00 85.34 a 0.00 z 681.50 864.50 4492.26
1974 989.93 a 846.50 602.50 498.00 160.50 11.50 2.00 g 0.00 c 48.21 b 300.00 678.00 1007.00 5142.15
1975 965.50 846.00 777.50 688.50 325.50 a 43.00 0.00 2.50 42.93 a 374.21 c 664.66 a 342.50 t 4730.30
1976 910.50 708.43 a 742.40 b 551.00 196.33 a 66.50 0.00 23.50 92.00 413.50 627.93 a 954.28 a 5286.37
1977 982.00 711.50 837.00 451.07 b 419.57 b 12.50 0.50 1.00 98.00 263.50 570.00 b 727.00 5073.64
1978 840.10 a 722.08 b 557.50 479.00 281.00 16.55 a 4.65 a 11.50 103.45 a 216.50 658.97 a 1003.37 a 4894.66
1979 1066.92 a 854.52 a 711.81 e 503.33 c 259.50 77.00 2.77 c 34.62 a 13.50 266.00 759.50 837.50 5386.96
1980 815.82 a 687.08 c 751.75 a 478.50 377.50 0.00 z 0.00 v 4.50 17.59 a 360.50 618.00 701.50 4812.73
1981 772.00 700.50 699.50 359.00 201.00 17.50 0.00 0.50 20.50 428.50 590.50 813.00 4602.50
1982 998.00 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 998.00
Period of Record Statistics
MEAN 928.11 771.11 748.40 532.56 253.51 45.11 0.61 6.80 70.49 330.16 649.66 915.57 5175.53
S.D. 91.40 87.24 86.97 93.96 75.49 25.74 1.25 11.34 46.95 79.86 78.31 120.81 418.56
SKEW -0.41 0.30 -0.63 0.47 0.68 -0.08 2.31 1.85 0.52 0.58 0.51 0.08 0.16
MAX 1066.92 952.50 870.00 720.00 419.57 79.29 4.65 36.68 160.50 507.88 808.00 1137.81 5809.05
MIN 772.00 639.50 557.50 359.00 158.50 11.50 0.00 0.00 13.50 216.50 521.50 701.50 4602.50
NO YRS 17 17 17 18 17 15 18 20 20 16 19 18 6