CLEARWATER, WASHINGTON

Monthly Total Heating Degree Days

(451496)

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
1895 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 150.00 i 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1896 0.00 z 387.50 h 0.00 z 0.00 z 489.00 297.50 112.50 106.00 297.00 423.50 830.50 636.00 3192.00
1897 720.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 230.36 b 51.00 y 0.00 z 0.00 z 950.86
1898 795.50 605.50 680.50 510.00 339.50 193.00 131.50 65.00 191.50 416.43 a 645.50 890.00 5463.93
1899 763.00 769.00 0.00 z 0.00 z 126.50 v 324.00 143.50 186.00 202.00 476.50 445.50 701.00 4010.50
1900 751.50 669.00 542.50 469.50 326.00 198.50 118.00 144.00 283.50 485.00 573.50 f 454.50 j 3987.50
1901 835.50 743.04 a 659.00 613.00 439.50 335.69 a 260.00 122.93 b 308.50 290.07 c 518.00 721.50 5846.73
1902 808.00 85.00 y 393.50 m 551.50 361.00 269.00 184.45 a 156.50 293.50 394.96 d 619.29 b 620.00 g 3638.20
1903 725.50 744.07 a 734.00 584.46 b 409.50 198.89 c 207.70 a 140.00 262.00 400.00 652.50 745.00 5803.63
1904 784.30 a 806.50 738.12 b 416.00 432.97 a 300.52 a 168.50 172.00 217.50 391.63 a 504.31 a 725.00 5657.35
1905 797.50 703.00 549.50 470.50 392.00 244.50 155.52 a 180.12 b 241.00 581.00 647.50 766.50 5728.64
1906 781.50 654.50 691.00 436.50 414.50 250.96 d 26.50 69.00 205.00 368.50 619.14 a 739.00 5256.10
1907 1008.53 a 573.46 b 722.50 483.50 321.22 b 194.00 94.07 b 152.00 193.93 b 0.00 z 513.00 703.50 4959.72
1908 770.87 a 754.00 b 667.03 b 546.50 0.00 z 0.00 z 40.50 z 0.00 z 17.00 z 546.63 a 272.00 p 863.19 b 4148.22
1909 1008.65 d 710.00 740.50 604.66 a 483.60 a 142.00 q 158.50 j 266.00 308.00 492.00 671.79 b 0.00 z 5285.19
1910 907.50 816.67 a 652.50 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 2376.67
1911 0.00 z 0.00 z 0.00 z 0.00 z 70.50 x 289.66 a 124.52 a 137.36 b 304.29 b 441.00 627.00 532.50 h 1923.82
1912 700.00 625.00 464.50 j 563.00 377.17 a 325.50 217.00 201.50 a 218.00 481.00 603.50 555.00 g 4311.67
1913 910.07 c 703.00 719.00 528.50 421.00 243.00 149.00 123.47 b 225.50 466.00 611.00 716.00 5815.54
1914 715.50 605.50 590.50 485.50 358.05 a 317.00 196.52 c 70.00 v 288.89 c 320.33 a 558.10 a 870.50 5306.39
1915 792.57 a 602.50 495.00 449.50 364.00 266.00 190.77 e 97.00 h 253.39 b 393.00 681.96 b 753.41 c 5242.10
1916 1068.50 667.50 0.00 z 563.28 a 502.20 a 331.07 b 0.00 z 18.00 z 270.00 c 536.50 693.10 a 844.75 c 5476.90
1917 853.00 751.00 783.00 606.50 478.43 a 359.48 a 285.95 b 254.00 245.00 c 416.36 b 468.50 0.00 z 5501.23
1918 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
1919 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
1920 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
1921 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
1922 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
1923 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
1924 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
1925 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
1926 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
1927 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
1928 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
1929 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
1930 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
1931 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
1932 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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
1939 0.00 z 0.00 z 0.00 z 0.00 z 264.00 i 328.00 204.00 143.50 213.50 435.50 492.00 602.00 2418.50
1940 681.00 594.00 553.00 441.50 329.50 256.00 178.00 128.00 149.00 326.50 681.50 0.00 z 4318.00
1941 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
1942 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 68.41 b 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 68.41
1943 0.00 z 0.00 z 0.00 z 0.00 z 344.00 m 387.86 b 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 387.86
1944 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
1945 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
1946 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
1947 0.00 z 0.00 z 560.50 502.50 373.50 270.00 211.50 251.21 b 0.00 z 0.00 z 0.00 z 0.00 z 2169.21
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 215.50 250.50 200.00 287.00 341.50 f 666.50 892.00 2511.50
1949 1034.50 780.50 630.00 505.50 383.00 369.00 291.00 199.50 222.00 546.67 e 458.65 d 797.73 a 6218.06
1950 1179.00 725.50 707.50 584.00 521.50 233.50 236.00 189.00 279.00 449.00 634.50 578.00 6316.50
1951 818.50 662.00 799.00 519.50 397.50 283.00 185.50 245.50 246.50 414.50 577.00 798.50 5947.00
1952 932.00 690.00 695.00 551.50 405.50 372.50 203.00 176.50 205.00 293.00 624.00 708.00 5856.00
1953 624.50 631.00 665.00 545.50 396.50 350.00 211.00 140.00 219.50 348.00 534.00 674.50 5339.50
1954 872.50 672.00 741.50 625.00 427.00 345.50 287.50 225.00 231.50 421.00 469.50 760.00 6078.00
1955 759.50 709.50 789.50 666.00 534.00 319.00 257.00 286.00 281.50 439.00 727.00 809.50 6577.50
1956 805.00 834.50 744.00 513.00 368.50 316.00 142.00 g 171.50 248.00 476.50 646.50 729.00 5852.50
1957 913.50 715.00 645.00 510.50 355.50 258.00 252.50 227.00 115.00 380.00 539.00 630.00 5541.00
1958 645.00 482.00 670.00 533.50 304.50 129.50 104.50 159.50 215.50 375.00 657.00 616.50 4892.50
1959 715.00 633.50 672.50 506.50 435.66 c 301.00 174.50 271.77 a 299.50 440.72 a 631.50 743.00 5825.14
1960 792.50 665.50 685.50 498.00 433.50 373.00 219.50 226.50 262.00 430.00 639.00 708.00 5933.00
1961 701.38 c 580.50 638.50 531.50 409.20 a 224.50 145.50 113.50 279.50 500.50 718.00 765.00 5607.58
1962 798.50 572.00 706.00 484.50 479.00 322.50 237.00 178.00 238.50 383.00 540.00 657.50 5596.50
1963 855.00 486.50 670.00 511.00 405.00 299.50 173.50 150.50 110.50 0.00 z 577.50 666.50 4905.50
1964 715.00 665.50 667.00 594.00 476.00 256.00 214.50 158.00 246.50 333.50 646.00 821.00 5793.00
1965 808.00 606.67 a 599.00 502.50 480.00 313.50 157.00 132.00 278.50 329.00 477.00 737.50 5420.67
1966 725.50 613.50 669.00 473.50 417.50 265.00 209.50 187.00 175.00 422.50 559.50 302.00 p 4717.50
1967 677.00 601.00 706.50 595.50 385.50 189.50 141.50 67.50 95.00 365.00 570.00 798.50 5192.50
1968 762.50 562.50 579.50 592.50 397.00 312.00 156.00 156.50 229.50 456.00 569.50 857.50 5631.00
1969 989.00 716.00 633.00 532.50 352.50 160.00 207.50 233.50 238.00 455.50 561.50 644.50 5723.50
1970 712.00 535.50 612.00 602.50 454.50 244.00 219.50 205.50 295.00 454.00 616.00 797.50 5748.00
1971 784.00 639.00 743.50 550.00 413.00 353.50 187.50 123.50 285.00 441.50 586.50 834.50 5941.50
1972 882.00 698.00 618.00 623.50 338.50 273.50 145.00 149.50 322.00 503.00 611.00 827.00 5991.00
1973 797.00 603.50 657.00 285.50 n 213.50 n 0.00 z 183.23 c 286.23 a 224.00 468.00 719.50 702.50 4640.97
1974 845.00 671.50 663.50 514.50 508.00 324.64 b 231.00 188.50 174.50 460.50 590.00 705.80 c 5877.45
1975 784.30 a 659.00 718.00 646.00 419.50 333.00 175.87 e 222.50 215.00 465.50 640.50 755.00 6034.17
1976 689.00 708.50 758.50 558.00 436.00 358.50 0.00 z 206.00 208.50 340.00 573.50 680.50 5517.00
1977 793.00 517.00 718.17 a 0.00 z 0.00 z 0.00 z 235.50 f 130.00 267.00 462.50 700.00 766.73 a 4354.40
1978 658.00 552.00 586.00 509.50 452.50 0.00 z 190.50 200.00 286.50 416.00 723.50 916.50 5491.00
1979 998.50 0.00 z 0.00 z 503.50 309.00 h 340.00 c 168.50 161.50 0.00 z 0.00 z 688.85 d 624.13 a 3484.98
1980 0.00 z 0.00 z 618.97 a 461.00 381.50 283.50 158.00 192.00 198.00 370.50 549.50 638.50 3851.47
1981 652.00 592.00 537.00 504.00 361.50 259.00 157.50 102.50 197.50 451.50 584.50 768.50 5167.50
1982 876.00 657.00 664.00 606.50 416.00 229.50 195.50 133.50 165.50 392.50 714.50 794.00 5844.50
1983 633.50 549.50 523.50 472.50 311.00 238.50 140.00 115.50 252.00 471.50 570.00 944.50 5222.00
1984 754.00 607.00 539.50 513.50 424.50 293.50 173.00 161.00 230.50 507.00 643.50 910.50 5757.50
1985 870.00 704.00 718.00 494.50 353.50 251.50 92.00 142.50 257.00 475.50 863.00 934.50 6156.00
1986 661.00 659.50 512.50 558.50 377.00 168.00 205.50 62.50 250.00 346.50 589.50 725.00 5115.50
1987 763.50 0.00 z 562.50 425.00 346.50 241.50 185.00 155.00 205.50 378.00 509.00 841.50 4613.00
1988 811.00 613.50 628.50 487.50 391.50 286.50 175.50 154.50 266.50 346.00 631.00 767.50 5559.50
1989 792.50 859.00 706.50 428.50 364.00 216.00 198.00 165.00 203.50 417.00 604.50 685.00 5639.50
1990 717.00 728.00 596.00 445.50 393.50 251.00 112.00 88.00 166.50 523.50 603.50 923.00 5547.50
1991 823.50 522.00 705.50 530.00 406.50 306.50 153.00 185.00 178.50 447.50 566.00 680.50 5504.50
1992 664.00 546.00 497.50 443.50 307.50 178.00 129.00 144.50 272.00 408.00 603.00 849.00 5042.00
1993 921.00 678.50 587.50 479.50 258.00 244.50 209.00 148.50 289.00 387.50 715.00 739.50 5657.50
1994 648.00 693.50 597.00 450.00 355.00 289.50 195.00 163.50 167.00 482.50 745.50 777.50 5564.00
1995 682.50 569.50 599.50 492.00 351.50 258.00 114.50 204.00 144.00 441.50 535.50 719.50 5112.00
1996 756.50 660.50 600.50 455.00 444.00 282.00 132.00 140.50 283.00 483.00 654.00 807.00 5698.00
1997 723.50 630.00 656.50 504.00 295.50 232.00 150.00 74.50 136.50 395.00 539.00 733.50 5070.00
1998 709.50 588.50 585.50 534.00 354.00 238.50 110.50 154.50 239.50 429.50 561.50 805.50 5311.00
1999 727.95 c 667.92 d 706.28 a 569.50 486.70 a 298.50 212.87 a 147.00 289.50 494.97 a 568.39 b 739.00 5908.57
2000 826.84 b 667.00 662.50 478.97 a 438.65 a 260.50 181.50 201.50 233.50 454.67 a 725.50 780.00 5911.13
2001 718.00 700.50 643.00 548.50 422.63 a 335.89 b 243.50 171.00 269.50 485.15 a 588.33 c 790.50 b 5916.51
2002 760.53 a 672.56 c 715.58 a 536.38 a 486.24 d 252.41 a 141.16 c 181.19 b 265.50 489.50 559.14 a 736.54 d 5796.74
2003 635.00 655.00 594.17 a 511.03 a 416.29 c 220.34 a 130.20 a 132.00 h 209.00 358.64 b 0.00 z 645.00 f 3729.67
2004 707.50 616.50 563.68 a 446.38 a 368.12 c 230.89 b 87.66 b 67.50 237.50 394.50 604.00 737.50 5061.74
2005 720.50 627.00 553.00 470.50 254.50 225.60 e 151.50 97.00 320.50 405.50 682.50 765.50 5273.60
2006 656.00 680.50 672.00 512.50 383.50 209.50 148.50 198.00 246.50 466.00 661.00 595.50 h 4834.00
2007 820.00 630.50 611.50 517.50 d 425.50 273.50 122.50 137.00 264.00 489.11 d 688.00 620.00 h 4979.11
2008 894.83 e 694.00 704.50 626.00 393.00 333.00 194.00 129.00 229.50 472.50 566.38 a 880.50 6117.21
2009 853.50 692.50 734.00 561.00 419.50 224.00 131.00 161.00 154.50 434.00 593.40 e 891.00 5849.40
2010 575.00 528.00 599.00 524.00 502.00 266.50 191.00 189.50 174.50 401.50 675.50 719.50 5346.00
2011 775.00 c 502.00 g 665.00 640.00 479.98 a 274.50 192.50 147.25 a 158.79 a 432.97 a 719.00 777.50 5262.49
2012 757.95 a 647.28 d 708.35 a 498.62 a 434.00 207.50 k 182.00 120.50 243.00 460.00 1065.00 1057.50 6174.20
2013 846.00 684.00 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 1530.00
Period of Record Statistics
MEAN 787.99 653.85 650.44 523.90 402.53 274.31 175.16 163.86 233.48 430.66 619.46 765.79 5657.19
S.D. 109.61 76.84 71.80 57.35 59.27 54.96 50.15 50.52 50.43 59.29 93.20 90.10 355.54
SKEW 0.94 0.16 -0.19 0.38 -0.06 -0.13 -0.07 0.23 -0.55 -0.14 1.41 0.47 -0.06
MAX 1179.00 859.00 799.00 666.00 534.00 387.86 291.00 286.23 322.00 581.00 1065.00 1057.50 6577.50
MIN 575.00 482.00 495.00 416.00 254.50 129.50 26.50 62.50 95.00 290.07 445.50 578.00 4892.50
NO YRS 85 80 80 81 80 83 83 83 86 83 84 76 56