SNOWFLAKE 15 W, ARIZONA

Monthly Total Heating Degree Days

(028018)

Base Temperature = 65 F

File last updated on Apr 3, 2013
*** Note *** Provisional Data *** After Year/Month 199802
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
1965 0.00 z 0.00 z 0.00 z 0.00 z 316.50 117.00 0.00 6.00 108.00 280.00 556.00 945.00 2328.50
1966 1167.50 968.00 723.50 411.00 139.50 35.00 0.00 4.50 43.50 351.50 509.00 990.00 5343.00
1967 1040.00 763.50 569.00 518.00 283.00 84.50 0.00 1.00 58.00 295.00 558.00 1232.50 5402.50
1968 1292.50 724.00 697.50 562.50 265.50 60.00 1.00 43.40 a 89.50 331.91 b 776.00 1068.00 5911.81
1969 825.50 863.00 876.00 469.82 b 237.50 37.50 0.00 f 0.00 d 42.41 a 492.50 754.00 850.50 5448.74
1970 1062.50 738.50 799.50 635.50 226.00 76.50 0.00 b 1.00 163.00 522.00 639.50 930.00 5794.00
1971 1014.50 809.50 673.00 546.00 350.50 79.00 3.00 0.00 126.00 533.50 738.50 1049.50 5923.00
1972 920.50 768.00 488.00 443.50 274.00 42.00 0.00 10.50 66.00 355.50 863.50 1035.50 5267.00
1973 1143.00 857.00 868.00 601.50 243.00 95.00 8.50 5.50 100.50 363.50 640.00 923.00 5848.50
1974 1081.00 890.00 594.00 510.50 167.50 28.00 0.00 0.00 111.50 323.00 718.00 1024.07 b 5447.57
1975 1045.98 b 871.00 792.50 635.50 358.16 c 40.00 0.00 2.00 62.68 b 327.50 497.00 j 1047.05 b 5182.37
1976 1017.50 751.00 803.50 480.50 206.50 43.00 0.00 7.00 106.50 444.00 716.50 1020.02 e 5596.02
1977 1119.00 802.00 826.31 b 479.00 354.12 e 4.00 h 0.00 l 3.50 h 29.00 k 290.00 613.00 739.35 a 5222.78
1978 893.83 a 803.50 661.33 d 191.00 q 305.50 23.00 0.00 1.00 91.50 245.50 707.22 c 1156.62 b 4889.01
1979 1128.00 650.00 f 722.00 482.50 325.50 96.72 a 4.50 25.32 a 36.00 258.00 829.00 967.50 4875.04
1980 979.50 754.50 791.00 564.31 a 408.00 49.50 2.00 13.00 41.00 434.00 684.50 821.50 5542.81
1981 858.50 755.00 774.50 400.50 244.50 38.00 4.50 4.50 54.00 396.00 586.50 839.00 4955.50
1982 1001.50 786.50 703.00 450.50 264.00 57.00 2.50 1.00 84.50 472.00 718.50 983.00 5524.00
1983 1011.00 759.50 715.00 643.00 312.00 65.50 0.50 2.50 49.00 340.50 705.00 829.00 5432.50
1984 1012.00 870.50 673.50 534.00 123.50 47.00 0.00 2.50 58.00 533.50 682.00 966.00 5502.50
1985 1023.50 848.50 704.00 399.00 225.00 63.50 0.00 2.50 155.50 362.18 a 697.50 965.50 5446.68
1986 801.50 724.00 589.50 437.50 217.50 12.50 2.00 0.00 138.10 a 456.50 683.00 980.00 5042.10
1987 1056.00 831.00 562.00 i 384.50 288.50 11.50 1.50 10.50 83.00 234.50 748.00 1040.00 4689.00
1988 1070.50 755.50 706.50 476.50 257.50 40.00 0.00 0.50 129.50 207.50 679.00 1034.50 5357.50
1989 1080.00 783.00 561.00 261.50 158.50 29.50 0.00 5.50 58.00 378.50 691.50 969.00 4976.00
1990 1024.50 866.50 644.00 407.50 267.00 29.00 0.00 12.00 65.50 348.00 709.50 1203.50 5577.00
1991 1038.00 724.50 834.50 530.00 300.00 109.50 0.00 0.00 42.00 270.50 740.00 1031.50 5620.50
1992 1268.00 789.00 687.50 325.50 206.00 40.50 4.00 34.50 50.00 279.00 860.50 1163.50 5708.00
1993 901.50 765.50 646.50 434.00 159.50 82.50 0.00 15.50 95.50 387.00 777.50 1003.00 5268.00
1994 933.50 829.00 635.50 435.50 266.00 3.50 0.00 0.00 43.00 398.50 770.00 905.00 5219.50
1995 954.50 621.50 622.50 530.50 329.50 76.00 4.00 0.50 40.50 305.00 534.50 859.00 4878.00
1996 871.00 627.50 673.00 385.50 89.00 9.00 0.00 0.00 120.50 370.00 663.00 857.00 4665.50
1997 1006.00 778.50 550.00 503.50 105.00 36.00 0.00 1.50 18.00 382.00 597.00 1081.50 5059.00
1998 840.50 802.50 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 1643.00
Period of Record Statistics
MEAN 1014.63 790.05 696.96 479.97 250.72 51.79 1.23 6.68 79.08 362.68 692.05 985.15 5396.48
S.D. 115.60 71.04 97.41 89.38 77.56 29.57 2.04 10.28 37.95 86.98 87.81 112.79 326.37
SKEW 0.28 -0.11 -0.01 -0.11 -0.28 0.46 1.88 2.26 0.55 0.37 -0.15 0.11 -0.33
MAX 1292.50 968.00 876.00 643.00 408.00 117.00 8.50 43.40 163.00 533.50 863.50 1232.50 5923.00
MIN 801.50 621.50 488.00 261.50 89.00 3.50 0.00 0.00 18.00 207.50 509.00 739.35 4665.50
NO YRS 33 32 31 31 33 32 31 32 32 33 32 33 26