METHOW 2 S, WASHINGTON

Monthly Total Heating Degree Days

(455326)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201302
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
1970 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 16.50 15.00 272.00 591.00 945.50 1391.50 3231.50
1971 1306.00 1000.00 972.50 516.00 175.50 174.00 52.50 27.50 258.46 d 609.31 b 882.00 1202.00 f 5973.77
1972 1478.00 1075.00 769.00 628.50 245.50 96.00 17.50 16.02 a 308.00 585.50 810.50 1311.50 7341.02
1973 1343.33 a 957.00 706.50 455.00 231.00 113.50 16.00 32.00 153.50 521.00 998.50 1102.50 6629.83
1974 1403.02 b 896.00 a 834.50 468.00 353.50 83.00 26.50 1.50 74.50 471.00 840.00 1112.90 a 6564.42
1975 1386.22 a 1163.56 a 934.00 576.00 306.50 130.00 2.58 a 61.00 94.14 a 528.00 944.48 a 1151.50 7277.98
1976 1215.00 971.50 877.00 507.00 296.50 161.50 4.50 41.50 60.50 518.50 883.00 1200.50 6737.00
1977 1404.00 857.00 731.00 301.00 g 321.50 47.50 22.50 21.50 214.00 529.00 951.00 1269.50 6368.50
1978 1227.00 923.00 706.50 495.50 307.00 54.50 8.50 37.00 231.35 d 498.50 1049.50 1410.50 6948.85
1979 1647.50 1112.00 706.50 533.50 223.00 80.00 28.50 4.00 89.00 409.00 994.50 768.50 i 5827.50
1980 1524.00 1012.50 847.50 431.00 247.00 173.00 34.50 86.28 a 170.00 517.50 886.80 e 1202.50 7132.58
1981 984.00 644.00 g 669.71 b 524.00 289.00 200.50 50.00 11.76 b 176.00 581.77 a 814.50 1320.08 a 5621.32
1982 1342.50 1026.00 780.50 630.00 313.00 64.00 43.00 19.50 169.00 601.00 1049.50 1298.00 7336.00
1983 1106.50 891.00 671.00 492.50 243.00 114.50 66.00 11.00 259.00 533.00 834.00 1565.00 6786.50
1984 1216.50 956.00 675.50 551.50 414.00 117.50 15.00 23.00 244.50 612.00 956.00 1588.00 7369.50
1985 1373.00 1241.50 902.00 440.00 225.00 54.50 0.00 24.28 a 253.50 542.50 1283.50 1452.50 7792.28
1986 1186.50 1001.50 651.00 489.00 319.82 a 30.00 28.00 0.00 254.50 435.00 856.00 1151.00 6402.32
1987 1255.50 853.50 693.88 a 355.50 194.00 58.00 14.00 5.50 68.00 417.00 764.50 1243.00 5922.38
1988 1320.50 961.00 705.50 391.50 262.50 111.00 16.00 10.50 158.50 376.50 874.50 1202.00 6390.00
1989 1226.50 1139.00 861.50 384.00 241.50 33.62 a 18.50 14.00 73.00 522.00 791.50 1051.50 6356.62
1990 1061.50 964.50 715.00 348.00 289.00 116.50 16.50 21.50 22.00 630.50 810.50 1400.50 6396.00
1991 1314.50 715.00 782.00 472.50 288.50 117.00 2.58 a 10.00 51.50 563.00 920.50 1084.00 6321.08
1992 1081.00 791.00 534.50 453.50 161.00 24.50 16.50 43.00 181.50 463.00 908.50 1350.00 6008.00
1993 1337.50 1085.00 826.50 552.50 145.50 109.50 46.00 28.50 161.50 433.00 1082.50 1207.00 7015.00
1994 1117.00 1039.00 670.00 373.50 193.00 116.00 2.50 4.50 53.00 508.00 1086.00 1247.50 6410.00
1995 1230.00 901.00 816.50 493.50 198.50 110.50 7.50 90.50 118.00 558.50 888.00 1179.50 6592.00
1996 1352.50 1106.50 808.50 508.00 398.00 116.00 29.00 16.00 214.00 567.50 1002.00 1429.50 7547.50
1997 1366.00 1044.50 869.50 538.50 251.00 138.00 28.00 14.00 123.00 562.50 795.50 1142.00 6872.50
1998 1272.50 807.50 685.00 474.50 183.50 56.00 0.00 11.00 71.50 553.00 753.50 1190.92 a 6058.92
1999 1101.00 915.00 808.00 521.00 376.00 140.00 33.00 24.00 180.00 551.00 717.50 0.00 z 5366.50
2000 0.00 z 445.50 p 567.00 g 165.50 s 258.50 73.50 h 29.28 d 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 287.78
2001 0.00 z 0.00 z 0.00 z 0.00 z 207.00 109.00 13.00 9.00 86.67 c 194.50 q 294.50 t 1128.92 a 1553.58
2002 1105.50 935.50 600.00 j 421.50 270.50 65.50 23.50 18.00 135.50 551.50 829.50 975.00 5331.50
2003 1064.00 903.50 677.50 452.00 267.00 46.50 5.50 0.00 113.00 349.00 1004.00 1224.00 6106.00
2004 1200.00 949.50 613.00 350.50 198.06 d 71.50 7.50 15.50 161.00 359.00 j 837.00 1066.50 5470.06
2005 1246.50 865.00 605.00 421.00 172.50 90.00 1.00 5.00 136.50 434.50 972.50 1305.50 6255.00
2006 1058.50 1005.00 750.00 411.50 256.00 81.00 4.00 15.00 119.00 315.50 i 942.50 1248.00 5890.50
2007 1355.50 900.00 667.00 449.50 203.50 83.50 0.00 15.50 135.00 355.50 j 897.00 1301.50 6008.00
2008 1430.00 1027.00 797.50 559.00 173.50 102.78 c 4.00 17.50 124.50 516.00 784.50 0.00 z 5536.28
2009 1363.00 1033.00 871.00 450.50 238.00 35.00 5.50 23.00 106.50 613.50 810.50 1312.00 6861.50
2010 1016.00 756.00 646.00 472.00 344.00 133.50 28.00 40.00 131.50 441.15 e 974.00 1144.50 6126.65
2011 1192.50 1052.50 775.00 599.50 317.50 126.50 24.50 1.50 91.50 517.00 940.00 1166.50 6804.50
2012 1219.00 947.50 764.50 416.00 279.00 120.00 11.00 18.00 114.31 a 548.00 802.00 1138.50 6377.81
2013 1379.00 935.50 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 2314.50
Period of Record Statistics
MEAN 1263.62 967.90 753.27 477.10 259.00 97.69 19.05 21.52 147.91 519.99 906.53 1243.84 6691.32
S.D. 145.75 110.53 97.72 72.49 64.90 41.91 15.80 19.83 70.45 69.07 110.99 137.14 493.62
SKEW 0.16 0.05 0.16 0.16 0.41 0.22 0.95 1.98 0.43 -0.63 0.94 0.59 0.42
MAX 1647.50 1241.50 972.50 630.00 414.00 200.50 66.00 90.50 308.00 630.50 1283.50 1588.00 7792.28
MIN 984.00 715.00 534.50 348.00 145.50 24.50 0.00 0.00 22.00 349.00 717.50 975.00 5922.38
NO YRS 41 40 39 39 42 41 43 42 42 38 41 38 30