LITTLETON, COLORADO

Monthly Total Heating Degree Days

(055056)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 199401
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
1978 0.00 z 0.00 z 0.00 z 0.00 z 340.00 47.00 f 2.50 25.50 106.00 426.50 809.00 1223.00 2932.50
1979 1415.00 911.56 a 804.00 542.50 367.00 123.50 1.60 b 33.00 104.00 457.50 1018.50 971.00 6749.16
1980 1204.87 a 865.50 844.00 581.50 313.50 16.50 0.00 15.00 95.00 503.00 756.50 782.50 5977.87
1981 978.50 860.50 810.00 316.00 312.50 29.00 4.00 21.50 48.50 506.50 671.50 1017.00 5575.50
1982 1052.00 923.00 704.00 488.00 298.00 113.00 9.00 2.00 185.00 561.00 944.50 1120.50 6400.00
1983 1074.00 849.50 834.93 a 611.50 380.78 a 129.00 3.50 0.00 a 96.00 409.00 825.00 1414.50 6627.72
1984 1109.50 863.00 825.00 633.00 144.00 83.00 0.00 0.50 224.00 686.00 812.50 1054.50 6435.00
1985 1214.50 949.00 666.50 428.50 225.50 59.00 0.50 7.00 250.00 468.10 a 1026.50 1076.50 6371.60
1986 720.50 789.50 467.00 368.50 232.00 13.00 0.00 2.00 240.00 569.00 799.14 a 1110.00 5310.64
1987 1045.00 778.50 757.00 346.03 a 264.00 39.00 10.50 40.00 192.50 489.00 805.34 a 1220.50 5987.38
1988 1251.50 900.50 823.05 a 461.38 a 210.80 a 16.50 13.50 6.50 157.50 420.00 782.50 973.00 6016.73
1989 952.22 a 1131.41 a 664.50 459.00 225.50 104.00 0.00 6.20 a 192.41 a 502.50 717.93 a 1240.50 6196.17
1990 996.50 946.50 884.00 553.00 379.00 32.50 30.50 13.50 101.00 496.00 640.00 1270.50 6343.00
1991 1208.50 0.00 z 704.50 562.50 271.25 a 28.50 13.50 10.50 162.50 511.50 943.50 1068.50 5485.25
1992 1059.00 786.00 684.00 372.50 189.00 65.50 13.50 59.50 94.50 393.50 978.50 1238.00 5933.50
1993 1246.50 1056.00 766.00 565.00 271.50 105.50 10.00 40.00 258.00 569.00 971.00 1060.50 6919.00
1994 1053.50 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 0.00 z 1053.50
Period of Record Statistics
MEAN 1098.85 900.75 749.23 485.93 276.52 63.83 7.04 17.67 156.68 498.01 843.87 1115.06 6203.09
S.D. 159.33 99.90 105.12 102.15 70.07 42.34 8.22 17.52 66.00 74.10 121.86 150.32 440.86
SKEW -0.31 0.90 -1.21 -0.24 -0.06 0.27 1.46 0.98 0.10 0.82 0.05 -0.15 -0.34
MAX 1415.00 1131.41 884.00 633.00 380.78 129.00 30.50 59.50 258.00 686.00 1026.50 1414.50 6919.00
MIN 720.50 778.50 467.00 316.00 144.00 13.00 0.00 0.00 48.50 393.50 640.00 782.50 5310.64
NO YRS 16 14 15 15 16 15 16 16 16 16 16 16 14