BOTHELL, WASHINGTON

Monthly Total Heating Degree Days

(450826)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 195905
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
1931 678.38 a 655.50 635.50 a 408.50 202.50 181.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2761.88
1932 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 120.38 a 246.50 415.50 575.50 935.68 a 2293.57
1933 868.00 855.00 706.00 561.43 b 463.00 274.00 178.50 112.00 315.50 480.00 637.50 717.50 6168.43
1934 688.50 590.00 519.50 362.00 323.00 220.50 164.00 113.00 284.00 423.09 d 533.50 765.00 4986.09
1935 826.00 650.22 a 773.50 581.00 415.00 205.00 157.50 161.00 218.50 514.00 763.00 740.00 6004.72
1936 756.50 956.48 a 751.50 456.50 297.50 167.00 127.00 115.98 b 286.50 385.50 605.50 633.43 a 5539.40
1937 1199.00 759.36 c 585.38 a 362.50 k 274.00 j 166.50 68.50 o 125.03 a 245.17 a 392.00 592.00 738.00 4802.45
1938 830.50 671.00 676.50 468.00 370.50 196.00 110.00 194.50 169.00 431.50 721.50 777.00 5616.00
1939 726.00 763.00 676.50 446.50 363.00 253.39 b 133.00 108.00 256.50 473.50 540.58 d 665.43 b 5405.40
1940 732.00 619.74 b 552.00 438.00 284.00 176.00 93.50 107.50 146.50 343.21 c 718.97 a 729.00 4940.42
1941 730.50 569.50 506.85 a 423.00 335.50 200.00 c 60.40 b 106.29 c 222.00 f 426.00 587.00 767.50 4712.53
1942 845.50 717.50 664.50 483.00 372.50 242.00 80.00 65.50 249.50 381.50 708.10 a 745.00 5554.60
1943 1024.07 b 642.50 714.00 437.50 411.50 255.50 140.00 149.00 178.50 425.00 618.50 853.00 5849.07
1944 778.50 746.50 702.67 a 486.96 b 367.50 221.90 a 101.00 146.50 148.39 b 401.50 638.00 833.00 5572.42
1945 737.00 667.00 724.50 620.00 324.47 a 288.10 a 94.50 122.00 281.00 432.00 724.50 860.50 5875.57
1946 838.00 699.50 672.50 543.00 298.50 243.50 91.50 113.00 196.00 552.00 759.50 831.50 5838.50
1947 950.00 617.00 579.50 452.50 264.00 188.50 117.00 122.50 232.00 448.00 688.50 751.50 5411.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 168.50 130.00 120.90 a 275.17 a 475.85 a 716.90 a 940.00 2827.32
1949 1141.32 a 838.96 a 620.52 a 462.00 284.50 248.00 159.00 112.50 168.00 545.00 486.50 803.00 5869.30
1950 1262.50 731.11 a 691.82 a 559.66 a 439.17 a 187.76 a 117.50 87.50 190.86 a 477.00 652.00 630.50 6027.37
1951 862.00 684.96 a 783.27 a 490.34 a 367.35 a 175.00 76.00 125.50 182.00 442.00 634.50 861.50 5684.42
1952 900.50 695.00 695.00 505.00 375.50 309.50 84.50 g 110.00 151.00 285.50 698.50 729.50 5455.00
1953 643.50 653.50 656.00 514.00 360.00 259.50 101.00 92.00 198.50 390.50 523.00 718.50 5110.00
1954 902.00 618.00 752.50 561.00 371.00 306.00 205.50 173.50 217.00 494.50 505.50 768.50 5875.00
1955 849.50 775.00 854.50 627.00 472.00 261.50 183.00 197.50 303.00 463.00 847.50 873.00 6706.50
1956 869.50 915.50 753.30 a 524.50 312.00 271.00 98.00 132.50 78.50 s 378.50 h 710.89 b 734.00 5321.19
1957 1043.00 695.00 591.50 417.00 226.00 114.00 h 114.50 77.00 k 113.00 445.50 662.00 652.50 4960.00
1958 671.15 a 451.50 639.50 447.69 d 187.07 b 91.00 28.70 d 29.00 h 186.50 353.50 714.44 c 435.00 i 3771.06
1959 763.00 671.50 615.00 466.00 370.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2886.00
Period of Record Statistics
MEAN 856.16 700.36 670.14 490.08 340.68 221.43 119.21 125.36 217.54 434.49 650.51 771.31 5686.01
S.D. 160.35 106.70 82.96 66.38 72.89 51.63 41.29 30.81 55.17 60.67 88.70 83.68 424.00
SKEW 1.01 0.41 -0.05 0.40 -0.29 -0.29 0.11 0.80 0.06 -0.19 -0.05 0.27 0.21
MAX 1262.50 956.48 854.50 627.00 472.00 309.50 205.50 197.50 315.50 552.00 847.50 940.00 6706.50
MIN 643.50 451.50 506.85 362.00 187.07 91.00 28.70 65.50 113.00 285.50 486.50 630.50 4940.42
NO YRS 27 27 27 26 26 26 24 25 25 26 27 26 19