TONASKET 4 NNE, WASHINGTON

Monthly Total Heating Degree Days

(458520)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200409
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
1984 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 6.00 18.50 251.38 a 629.00 864.83 a 1487.50 3257.21
1985 1297.50 1143.50 823.10 b 423.50 200.98 a 62.50 0.00 45.50 283.00 551.50 1281.00 1384.00 7496.09
1986 1165.50 965.50 601.50 491.00 260.50 28.00 37.41 b 0.00 b 259.50 486.91 b 836.90 a 1099.50 6232.22
1987 1136.00 796.00 618.97 a 333.50 167.50 37.00 9.50 14.00 99.50 482.50 758.79 a 1113.00 5566.26
1988 1264.50 872.50 679.93 a 355.00 234.00 104.50 10.50 19.50 186.00 399.50 812.00 1115.50 6053.43
1989 1112.50 1147.50 764.50 365.50 236.00 30.50 8.50 31.50 133.50 519.00 779.50 1000.50 6129.00
1990 972.50 975.00 660.00 338.00 269.00 103.50 4.50 18.50 56.50 571.50 759.50 1352.00 6080.50
1991 1319.00 717.50 749.50 446.50 257.00 115.00 5.00 19.50 75.00 578.00 846.50 1004.50 6133.00
1992 983.50 737.50 534.00 369.00 163.00 24.00 9.50 44.00 216.50 484.50 844.50 1336.00 5746.00
1993 1388.50 1022.00 751.00 473.50 125.00 92.50 34.50 40.00 178.00 436.50 1038.50 1058.50 6638.50
1994 953.00 909.50 626.00 338.00 185.00 101.50 11.00 9.00 60.50 485.00 979.50 1072.00 5730.00
1995 1125.00 764.50 0.00 z 458.00 151.00 74.00 2.00 58.00 93.00 539.00 813.00 1080.87 a 5158.37
1996 1272.00 1025.00 762.50 426.50 325.00 89.50 18.50 21.00 224.50 589.50 986.00 1348.00 7088.00
1997 1231.50 998.50 766.50 493.00 163.50 91.00 14.50 7.00 100.50 531.50 821.00 1032.50 6251.00
1998 1136.50 747.00 645.50 405.00 139.00 43.00 0.00 9.50 79.00 500.50 690.00 1112.90 a 5507.90
1999 992.50 792.50 705.50 456.00 318.50 122.00 30.00 11.50 178.50 555.50 696.00 956.50 5815.00
2000 1164.50 930.50 671.50 362.00 263.50 79.50 19.00 31.52 a 178.50 533.72 a 953.00 1258.17 b 6445.41
2001 1084.00 934.50 700.50 461.50 206.00 108.50 9.50 2.50 99.11 b 571.95 a 732.50 1068.50 5979.06
2002 1017.50 839.00 868.50 433.00 282.00 53.50 10.50 16.50 150.50 575.50 807.50 938.50 5992.50
2003 956.50 821.00 668.50 429.00 274.50 38.50 3.50 0.00 116.50 363.00 1045.00 1143.00 5859.00
2004 1178.00 883.50 592.50 347.00 217.50 67.50 5.00 12.00 99.50 m 0.00 z 0.00 z 0.00 z 3303.00
Period of Record Statistics
MEAN 1137.53 901.12 694.21 410.23 221.92 73.30 11.85 20.45 150.97 519.20 867.28 1148.10 6152.38
S.D. 130.70 127.26 84.36 54.50 59.19 31.89 10.63 15.86 70.06 66.07 143.22 156.74 508.35
SKEW 0.14 0.38 0.19 -0.05 0.05 -0.15 1.23 0.80 0.37 -0.72 1.25 0.71 1.24
MAX 1388.50 1147.50 868.50 493.00 325.00 122.00 37.41 58.00 283.00 629.00 1281.00 1487.50 7496.09
MIN 953.00 717.50 534.00 333.50 125.00 24.00 0.00 0.00 56.50 363.00 690.00 938.50 5507.90
NO YRS 20 20 19 20 20 20 21 21 20 20 20 20 18