OMAK AP, WASHINGTON

Monthly Total Heating Degree Days

(456123)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1909 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 282.00 t 1342.00 1342.00
1910 1329.26 b 1177.12 c 329.00 m 294.00 158.50 108.50 0.00 67.00 109.14 a 229.50 q 611.00 f 1027.43 c 4270.95
1911 1512.00 1172.00 578.50 i 0.00 z 0.00 z 0.00 z 0.00 o 5.00 180.00 491.00 1021.00 1243.62 a 5624.62
1912 1395.00 917.50 755.50 404.50 158.00 58.00 22.00 50.50 215.00 580.73 a 791.50 1079.50 6427.73
1913 1408.50 1183.50 860.00 422.50 243.00 29.50 23.00 25.50 159.00 595.00 809.50 1061.50 6820.50
1914 1150.00 1080.50 706.50 349.00 160.00 96.50 2.00 0.00 227.00 450.53 a 803.50 1353.50 6379.03
1915 1401.00 921.00 624.50 314.50 239.50 82.50 14.00 2.50 125.50 431.50 997.50 1248.78 a 6402.78
1916 1642.50 1158.00 803.00 387.00 274.00 84.50 14.00 18.00 111.00 507.00 1011.50 1414.00 7424.50
1917 1458.00 1117.00 993.00 539.50 245.50 94.50 4.50 1.00 86.50 391.50 708.00 1173.00 6812.00
1918 1142.00 1020.50 736.00 385.00 252.00 31.50 1.00 21.50 11.00 380.00 826.50 1095.50 5902.50
1919 1207.00 988.50 802.00 369.00 240.00 93.50 3.00 0.00 121.03 a 576.50 908.50 1376.50 6685.53
1920 1256.00 901.00 745.00 506.00 279.50 60.00 0.00 22.00 104.00 492.50 766.50 1079.50 6212.00
1921 1251.00 1004.00 697.00 505.50 144.00 31.00 3.00 2.50 232.50 395.50 916.00 1252.50 6434.50
1922 1445.50 1248.50 882.00 500.00 257.00 1.00 0.00 14.50 67.00 389.00 867.50 1373.00 7045.00
1923 1124.50 1137.50 752.00 422.00 199.50 77.00 3.50 0.50 74.50 425.00 766.00 1140.50 6122.50
1924 1445.00 773.50 698.50 486.50 106.00 15.50 1.00 8.50 132.00 427.00 846.50 1341.50 6281.50
1925 1278.50 772.00 620.00 308.00 101.00 83.89 c 0.00 56.00 81.50 495.50 828.00 907.00 5531.39
1926 1111.35 a 751.50 511.00 266.50 167.83 b 24.00 0.00 0.52 a 250.00 435.00 735.50 1181.62 a 5434.81
1927 1270.50 949.50 750.50 463.00 270.50 4.50 0.00 2.50 151.50 465.50 882.00 1363.50 6573.50
1928 1211.50 868.50 653.00 518.50 123.50 47.50 0.00 7.00 129.00 535.50 866.00 1241.00 6201.00
1929 1526.00 1353.00 711.50 547.00 227.50 61.00 4.00 11.00 204.00 464.50 1031.00 1182.00 7322.50
1930 1661.00 903.00 621.50 311.50 220.00 81.00 8.00 3.50 119.50 533.00 910.50 1134.00 6506.50
1931 1038.50 954.50 690.50 402.50 132.00 42.00 2.00 0.00 140.50 434.50 888.00 1245.50 5970.50
1932 1339.50 1156.50 752.50 362.00 198.50 32.59 a 13.50 26.00 117.50 492.00 774.00 1258.50 6523.09
1933 1192.00 1246.50 756.00 418.50 325.00 71.00 0.50 7.50 203.50 453.50 720.00 1008.00 6402.00
1934 1016.50 750.50 573.50 214.50 173.00 23.50 2.50 3.50 239.00 380.00 666.50 1053.00 5096.00
1935 1238.50 835.50 764.50 505.50 234.50 39.00 19.00 9.00 76.00 505.50 958.00 1048.00 6233.00
1936 1088.00 1503.50 795.50 343.50 127.00 50.50 4.00 7.50 155.00 357.50 972.00 1053.00 6457.00
1937 1700.50 1206.00 716.00 468.50 214.50 77.50 0.00 56.50 111.00 418.00 786.50 1036.50 6791.50
1938 1065.50 985.50 775.00 417.50 198.50 44.50 0.00 14.50 35.50 407.00 939.50 1147.50 6030.50
1939 1020.50 1101.00 719.00 344.00 144.00 92.50 1.50 6.50 68.50 439.00 824.50 882.00 5643.00
1940 1071.50 902.50 578.00 350.00 74.00 l 30.00 0.00 2.00 39.50 350.00 971.00 1013.50 5308.00
1941 1026.00 809.50 567.50 313.00 174.50 37.50 0.00 28.50 245.50 492.50 756.50 986.00 5437.00
1942 1226.50 839.00 720.00 333.50 231.50 67.50 3.00 9.50 82.00 449.50 884.00 1119.50 5965.50
1943 1428.00 919.00 826.00 344.00 282.50 65.00 9.00 6.50 90.00 438.00 803.50 1101.50 6313.00
1944 1226.50 894.00 770.50 360.00 153.00 5.50 5.00 1.00 83.50 342.50 785.50 1161.00 5788.00
1945 1006.00 801.00 704.50 481.00 152.50 38.00 6.50 23.00 297.00 551.00 1014.50 1142.00 6217.00
1946 1233.50 1051.50 725.50 440.00 140.00 110.50 10.50 9.00 208.50 667.00 1023.50 1193.50 6813.00
1947 1354.00 965.00 656.00 460.00 132.00 98.00 22.50 36.50 166.50 509.50 878.50 1106.50 6385.00
1948 1376.00 1124.50 832.50 584.50 312.00 0.00 z 63.00 67.00 248.00 652.50 918.00 1590.00 7768.00
1949 1856.00 1305.00 795.00 437.50 166.00 105.00 23.00 24.59 b 186.50 627.75 c 749.50 1232.00 7507.84
1950 1832.50 1101.52 c 863.50 559.50 312.50 98.00 0.00 z 4.00 170.36 b 585.00 903.10 a 1010.00 7439.98
1951 1280.00 1048.50 1000.50 489.00 247.00 86.50 17.00 47.00 173.50 540.78 d 958.00 1417.50 7305.28
1952 1459.50 1101.00 847.33 a 441.96 b 211.00 100.38 d 21.00 47.50 120.50 412.50 971.00 1056.50 6790.18
1953 950.50 797.50 720.00 506.00 304.50 145.50 3.50 31.50 0.00 z 450.50 818.00 1029.50 5757.00
1954 1332.00 896.00 e 846.00 565.34 a 226.50 166.50 29.50 53.50 162.50 604.00 721.00 1133.00 6735.84
1955 1220.00 1108.59 a 1017.50 629.00 350.50 66.00 37.64 c 3.00 216.00 576.50 1160.50 1398.00 7783.24
1956 1248.50 1384.50 1004.50 405.00 169.50 90.58 d 12.00 24.50 146.50 578.00 968.50 1152.50 7184.58
1957 1608.26 b 1097.50 791.50 415.18 b 114.00 63.50 11.00 13.00 101.00 494.00 f 900.00 1030.50 6145.44
1958 1047.50 724.50 748.50 515.50 111.00 18.50 0.00 3.50 222.00 565.50 1012.00 1086.00 6054.50
1959 1196.50 1094.50 613.50 h 456.00 359.50 91.00 37.00 65.00 270.50 450.50 h 1044.50 1160.00 5774.50
1960 1413.00 1007.00 791.50 483.50 359.08 a 77.00 0.00 h 70.50 146.50 482.50 931.50 1235.00 6997.08
1961 1093.00 802.50 725.50 514.50 262.00 33.00 6.50 3.00 238.50 621.50 1063.00 1253.50 6616.50
1962 1343.00 899.50 862.50 420.50 311.50 103.50 41.00 37.50 127.00 520.00 784.50 1004.50 6455.00
1963 1332.50 832.50 717.50 528.62 a 238.00 80.00 17.00 17.00 80.50 461.00 866.50 1220.00 6391.12
1964 1215.00 1139.00 852.50 524.00 308.50 57.50 21.00 70.00 251.00 546.00 861.50 1307.50 7153.50
1965 1166.50 990.50 853.50 433.50 290.50 57.50 16.50 42.00 247.00 482.00 808.00 899.00 f 5387.50
1966 1301.50 950.50 786.00 492.00 241.00 119.50 27.50 37.00 55.50 571.50 784.14 a 1000.50 6366.64
1967 1015.00 758.07 a 770.50 599.00 300.50 33.00 3.00 0.50 84.00 533.00 841.00 1224.00 6161.57
1968 1232.00 808.50 685.00 579.50 266.00 78.50 5.50 62.50 161.50 651.50 858.50 1284.00 6673.00
1969 1679.50 1181.00 950.00 481.00 157.00 38.00 21.00 38.00 188.50 616.00 919.50 1105.15 a 7374.65
1970 1342.00 913.50 794.00 577.00 256.50 60.50 11.00 3.50 304.50 621.50 992.07 a 1409.50 7285.57
1971 1382.50 1012.00 982.50 529.00 203.00 139.00 47.00 30.00 290.50 625.50 896.50 1429.00 7566.50
1972 1459.00 1063.00 750.50 623.00 232.00 91.50 42.00 21.00 326.50 605.50 805.50 1185.75 c 7205.25
1973 1311.50 1026.50 718.00 482.00 258.00 122.00 25.50 50.00 198.00 571.50 987.50 1041.50 6792.00
1974 1242.50 830.00 782.50 486.50 379.00 101.54 d 29.97 a 15.50 137.00 554.50 830.50 1101.00 6490.50
1975 1372.00 1253.78 a 948.00 572.00 290.50 120.00 2.50 59.00 147.50 586.00 894.31 a 1130.50 7376.09
1976 1184.00 919.00 882.00 514.00 119.00 u 172.00 21.00 57.50 96.00 548.04 c 890.50 1166.00 6450.04
1977 1384.00 839.00 763.00 410.50 347.50 47.50 23.50 j 28.50 131.50 g 579.00 955.50 1219.50 6574.00
1978 1204.50 898.00 691.82 a 485.00 335.50 71.90 a 6.50 49.00 208.00 571.50 1048.50 1445.50 7015.71
1979 1589.02 b 1069.50 692.50 523.50 204.00 68.00 23.50 0.00 29.50 o 408.50 982.00 0.00 z 5560.52
1980 1452.50 997.00 786.50 369.50 0.00 z 126.21 a 0.00 p 13.50 94.50 401.50 0.00 z 0.00 z 4241.21
1981 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 0.00 z 0.00
1982 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 0.00 z 0.00
1983 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 0.00 z 0.00
1984 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 0.00 z 0.00
1985 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 0.00 z 0.00
1986 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 0.00 z 0.00
1987 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 0.00 z 0.00
1988 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 0.00 z 0.00
1989 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 0.00 z 0.00
1990 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 0.00 z 0.00
1991 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 664.00 k 0.00
1992 755.50 i 499.50 j 376.00 i 380.50 176.50 28.00 18.00 44.50 170.50 328.00 i 881.00 1375.00 3074.00
1993 913.00 k 1062.50 806.00 512.00 132.50 89.50 43.50 22.50 141.00 0.00 z 612.50 k 757.00 i 2809.50
1994 617.50 l 577.50 k 617.00 323.00 191.00 87.00 7.50 3.00 32.00 286.00 j 453.50 p 620.50 m 1260.50
1995 727.00 k 541.50 i 0.00 z 449.00 137.00 0.00 z 1.50 0.00 z 0.00 z 350.50 k 0.00 z 0.00 z 587.50
1996 0.00 z 733.00 i 0.00 z 445.00 313.00 62.50 15.50 17.00 179.00 580.00 298.50 u 779.50 m 1612.00
1997 928.00 i 751.00 h 839.00 356.00 i 106.50 k 72.50 i 12.50 o 5.50 l 89.00 351.50 i 450.00 m 758.00 i 928.00
1998 725.00 l 775.00 496.50 i 420.50 88.00 u 16.50 j 0.00 i 3.50 k 23.50 j 327.50 k 398.50 n 645.00 m 1195.50
1999 607.00 m 591.50 i 570.00 h 403.50 h 195.00 l 83.00 h 15.00 j 9.50 j 54.50 k 307.00 l 384.00 n 647.50 j 0.00
2000 800.00 k 705.00 i 513.00 i 233.50 j 167.00 i 50.00 i 19.00 j 12.50 h 96.00 k 329.00 j 0.00 z 803.50 l 0.00
2001 473.00 r 658.00 j 506.00 j 237.50 o 0.00 z 29.00 r 8.00 j 4.59 d 32.00 p 372.50 i 456.00 k 712.50 k 4.59
2002 683.50 k 612.00 i 609.00 k 462.00 186.50 k 33.50 k 3.00 k 8.50 l 110.00 545.50 813.00 982.50 2913.00
2003 1010.00 863.00 687.00 457.50 233.65 d 42.00 0.00 z 0.00 100.50 346.00 1011.00 1161.00 5911.65
2004 1218.00 948.50 583.00 337.00 195.76 d 45.00 5.00 h 11.00 113.00 412.00 809.50 1031.50 5704.26
2005 1253.50 799.50 597.50 400.80 e 159.00 7.50 z 0.00 z 0.00 z 47.00 x 415.00 934.80 e 1002.00 g 4560.10
2006 977.00 897.00 718.00 324.50 g 245.50 53.50 0.00 g 13.50 l 69.50 f 461.00 937.20 e 796.50 k 4289.20
2007 1295.28 a 908.78 e 665.43 b 468.50 183.00 91.00 4.00 14.98 a 164.50 544.80 d 668.50 j 1239.00 5579.28
2008 1362.45 a 1019.50 817.00 590.69 a 178.50 103.00 3.62 a 26.35 a 105.50 497.50 806.38 a 1393.50 6903.99
2009 1320.50 1032.00 866.00 481.00 253.00 0.00 z 2.00 0.00 z 88.00 594.00 771.72 a 1305.32 c 6713.55
2010 1018.00 764.00 671.00 473.00 254.00 g 96.92 d 31.00 20.50 g 96.00 g 442.00 990.50 0.00 z 4486.42
2011 1187.00 1012.00 756.00 418.50 k 307.50 62.00 p 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3262.50
2012 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 362.00 h 772.50 1031.78 a 1804.28
2013 1292.91 b 966.00 711.50 5.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 44.00 z 2970.41
Period of Record Statistics
MEAN 1290.79 992.05 760.49 448.70 223.87 71.11 12.69 22.50 151.17 501.76 883.44 1178.50 6547.83
S.D. 194.83 163.22 105.90 87.22 69.96 36.24 13.82 21.33 69.98 83.90 99.74 143.95 582.17
SKEW 0.63 0.60 0.33 -0.21 0.20 0.36 1.32 0.81 0.41 -0.02 0.20 0.41 -0.11
MAX 1856.00 1503.50 1017.50 629.00 379.00 172.00 63.00 70.50 326.50 667.00 1160.50 1590.00 7783.24
MIN 950.50 724.50 511.00 214.50 101.00 1.00 0.00 0.00 11.00 342.50 666.50 882.00 5096.00
NO YRS 81 83 81 84 80 79 75 80 79 78 79 77 58