UKIAH, CALIFORNIA

Monthly Total Heating Degree Days

(049122)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1906 0.00 z 0.00 z 335.50 h 269.00 226.00 106.50 0.00 2.00 30.50 155.52 a 443.00 552.50 1785.02
1907 714.00 341.00 547.00 211.50 189.00 80.00 3.00 11.00 94.50 134.00 426.00 587.50 3338.50
1908 599.50 548.50 442.50 252.00 304.50 88.50 0.00 4.50 32.00 237.00 383.50 689.00 3581.50
1909 527.00 499.00 502.00 188.00 185.00 46.00 18.50 1.00 28.00 192.50 455.50 690.27 a 3332.77
1910 732.50 519.50 325.00 194.50 78.50 52.50 6.50 0.00 44.00 126.00 418.50 537.50 3035.00
1911 656.50 606.00 367.50 336.00 253.50 22.50 0.00 5.50 84.00 223.50 433.50 663.00 3651.50
1912 520.00 409.50 483.00 390.50 162.50 52.00 6.50 6.50 63.50 329.00 460.50 634.50 3518.00
1913 717.00 480.50 474.50 332.00 163.50 52.00 0.50 3.00 28.50 162.00 477.00 648.50 3539.00
1914 533.50 429.00 274.00 284.50 121.50 79.00 0.00 4.00 74.50 265.00 480.50 743.48 a 3288.98
1915 636.50 498.50 368.50 237.00 265.50 52.00 0.00 1.00 71.50 198.00 496.00 569.00 3393.50
1916 752.50 387.00 371.00 241.50 238.00 61.00 4.50 6.50 29.50 323.00 535.50 731.00 3681.00
1917 747.50 491.00 562.65 a 333.00 277.00 41.50 1.00 0.00 42.50 96.00 375.50 506.50 3474.15
1918 536.00 508.50 436.00 272.50 191.00 3.00 3.00 15.50 40.00 106.50 472.00 743.00 3327.00
1919 611.50 536.50 486.00 192.00 93.50 59.50 3.00 0.00 116.50 280.50 563.50 664.00 3606.50
1920 555.50 523.00 531.00 432.50 171.00 50.50 19.00 15.00 76.00 296.00 475.50 626.00 3771.00
1921 670.00 449.04 a 370.50 355.50 234.00 48.50 1.50 4.50 52.50 141.50 380.00 593.00 3300.54
1922 746.50 553.00 554.50 347.50 185.50 41.50 0.00 5.00 12.50 245.50 519.00 637.50 3848.00
1923 679.50 516.00 449.50 371.50 198.50 141.21 a 7.50 8.00 93.50 259.00 359.50 678.00 3761.71
1924 672.00 371.00 500.00 227.50 80.50 41.00 1.00 13.50 30.00 209.00 421.00 638.00 3204.50
1925 536.50 391.00 438.50 240.50 119.50 52.50 3.50 1.00 76.50 169.50 463.00 485.00 2977.00
1926 569.00 377.00 229.50 136.00 113.00 4.00 0.00 3.50 84.00 154.00 295.00 631.00 2596.00
1927 568.00 474.00 451.50 312.00 210.50 19.00 0.00 7.50 75.50 145.50 335.00 652.00 3250.50
1928 563.00 437.00 334.00 316.00 62.00 23.00 1.50 0.00 58.50 192.50 437.00 660.50 3085.00
1929 654.00 541.50 434.50 409.50 127.50 103.50 1.50 0.50 65.00 118.00 402.50 431.00 3289.00
1930 654.00 364.00 322.50 272.50 246.00 40.00 0.00 0.00 40.00 156.50 361.00 628.00 3084.50
1931 530.00 379.00 308.00 219.00 31.50 20.00 0.00 0.00 58.50 153.00 439.50 638.50 2777.00
1932 648.00 493.50 301.00 338.00 132.50 24.50 4.00 3.50 0.00 122.00 276.50 675.50 3019.00
1933 668.50 522.00 409.50 273.50 289.00 58.00 0.00 1.00 33.50 53.50 305.50 527.50 3141.50
1934 440.50 364.00 147.50 133.00 77.50 45.50 4.50 0.00 43.00 168.00 359.00 579.00 2361.50
1935 634.00 436.00 545.00 303.50 107.50 21.00 14.00 0.00 8.50 191.00 450.50 576.00 3287.00
1936 509.00 470.50 322.50 211.50 107.00 41.50 5.00 0.00 32.50 94.03 a 363.00 620.00 2776.53
1937 832.00 546.50 409.50 344.00 119.00 38.00 0.00 0.00 31.50 99.50 343.00 524.50 3287.50
1938 500.50 466.50 506.50 291.00 100.50 9.00 3.50 7.00 27.00 185.00 447.00 475.00 3018.50
1939 566.50 526.00 364.50 176.00 133.50 57.00 0.00 4.00 21.00 131.00 345.50 498.00 2823.00
1940 508.00 412.00 303.00 234.00 83.00 3.00 0.00 0.00 32.50 168.00 430.50 480.00 2654.00
1941 515.50 385.00 339.50 304.50 144.50 92.50 0.00 14.00 54.50 198.00 324.50 533.50 2906.00
1942 543.50 477.50 429.50 338.00 234.50 36.00 0.00 4.00 10.50 129.50 406.50 561.50 3171.00
1943 582.00 397.00 348.50 240.52 a 157.00 95.00 0.00 4.00 4.00 197.50 334.50 556.00 2916.02
1944 609.50 514.50 351.50 384.00 143.00 79.50 0.00 3.50 20.50 83.50 441.00 517.00 3147.50
1945 535.50 404.50 518.50 269.50 171.50 37.00 0.00 0.00 19.14 a 121.50 412.00 561.50 3050.64
1946 600.00 540.50 449.50 253.50 111.50 70.50 7.00 0.50 18.50 241.00 475.50 537.50 3305.50
1947 635.50 339.00 288.00 164.00 52.00 43.00 6.00 6.00 18.50 143.00 410.00 576.50 2681.50
1948 509.50 526.00 496.50 417.50 221.00 30.50 23.50 1.00 61.00 114.00 320.00 f 706.36 c 3106.86
1949 790.50 537.00 455.00 165.50 129.00 16.50 0.00 1.50 3.00 159.00 212.50 609.00 3078.50
1950 731.00 403.00 420.50 220.00 131.50 51.50 0.00 0.00 19.50 153.50 258.50 444.50 2833.50
1951 571.00 429.50 380.00 198.50 122.50 15.50 7.00 5.00 4.50 142.00 368.50 602.00 2846.00
1952 695.00 468.00 475.00 200.50 98.50 66.50 0.00 0.00 13.00 64.50 411.00 538.00 3030.00
1953 442.00 367.50 385.00 252.00 221.00 97.00 0.00 4.50 6.50 160.88 b 330.50 516.00 2782.88
1954 565.00 315.50 424.00 183.00 78.50 89.00 2.50 18.00 39.00 174.50 353.00 598.50 2840.50
1955 655.00 471.00 418.00 413.00 110.00 29.50 18.00 0.00 15.50 100.00 404.50 517.00 3151.50
1956 550.00 552.00 391.50 232.50 135.37 a 31.50 0.00 d 0.00 10.50 211.00 382.00 586.50 3082.87
1957 724.50 414.00 396.00 227.00 159.50 10.00 1.50 3.50 9.50 204.50 392.50 558.00 3100.50
1958 554.00 347.50 517.50 264.50 45.00 33.50 0.00 0.00 20.00 83.50 350.00 451.50 2667.00
1959 513.50 489.00 327.50 138.50 184.00 40.00 0.00 6.00 36.00 89.00 331.50 573.50 2728.50
1960 626.95 b 465.50 324.50 298.00 190.00 0.50 0.00 4.00 3.50 123.00 260.00 j 513.00 2548.95
1961 506.50 393.50 459.00 234.50 222.50 23.50 6.72 a 4.00 11.50 182.00 406.50 580.50 3030.72
1962 541.50 489.00 482.50 177.00 198.50 23.00 0.00 0.50 17.00 141.00 343.50 493.50 2907.00
1963 619.50 249.50 485.00 424.00 131.00 41.50 15.50 3.00 3.50 143.50 400.50 541.00 3057.50
1964 631.00 439.00 466.50 299.00 207.00 67.50 11.50 4.00 27.50 85.50 459.50 530.00 3228.00
1965 528.50 434.00 385.50 299.00 171.50 57.50 1.00 0.00 34.50 61.00 378.00 659.00 3009.50
1966 594.00 495.00 379.00 148.45 a 81.50 50.50 10.50 8.50 22.50 100.50 360.50 514.50 2765.45
1967 548.50 362.50 492.50 536.00 140.00 51.50 0.00 0.00 0.00 81.00 283.50 615.50 3111.00
1968 614.00 299.00 338.00 233.50 165.00 34.00 0.00 17.50 12.00 146.00 390.00 649.50 2898.50
1969 638.00 538.50 400.00 320.50 66.50 24.50 0.00 0.00 10.50 182.50 337.00 471.50 2989.50
1970 494.50 367.00 354.00 383.50 100.00 30.50 0.00 0.00 15.50 191.50 345.00 634.50 2916.00
1971 543.00 422.00 458.50 361.00 174.00 54.00 1.50 6.50 53.50 268.50 445.00 702.50 3490.00
1972 634.00 444.00 279.00 303.00 117.50 26.90 a 0.00 9.00 53.00 206.00 453.00 707.50 3232.90
1973 623.50 403.00 489.50 207.50 92.00 20.50 0.00 7.00 18.50 140.50 444.00 516.00 2962.00
1974 619.00 504.50 401.00 296.50 144.50 20.50 16.50 0.00 2.00 101.00 416.00 560.50 3082.00
1975 551.00 470.50 447.50 432.00 114.50 28.50 11.00 2.50 0.00 220.00 467.50 520.00 3265.00
1976 560.50 473.00 453.50 379.00 104.50 0.00 z 4.00 28.00 20.00 111.50 235.50 552.50 2922.00
1977 571.50 328.50 469.65 a 189.00 304.00 8.50 4.50 1.00 33.50 135.00 386.50 490.50 2922.15
1978 473.00 382.00 275.00 351.00 115.00 23.00 8.50 15.00 26.00 77.50 427.50 618.50 2792.00
1979 595.00 483.50 329.50 271.00 90.50 19.50 2.50 3.00 3.50 123.48 a 399.50 508.00 2828.98
1980 493.00 340.00 405.07 a 228.50 157.00 104.00 14.00 0.50 21.50 141.00 340.00 464.00 2708.57
1981 467.50 346.50 379.00 245.00 115.00 15.50 0.00 0.00 29.50 194.00 309.00 451.50 2552.50
1982 630.00 386.50 479.00 322.00 89.50 48.00 5.50 0.00 42.50 151.50 450.50 572.50 3177.50
1983 504.50 367.00 405.00 361.50 138.50 17.50 14.50 1.50 6.50 0.00 z 412.50 489.50 2718.50
1984 453.50 447.50 294.50 311.50 99.00 42.00 0.00 0.00 8.50 239.50 455.50 640.50 2992.00
1985 593.50 0.00 z 462.50 0.00 z 140.50 14.50 2.00 0.00 52.50 177.50 0.00 z 565.00 2008.00
1986 455.00 337.50 243.50 248.00 166.00 15.50 0.00 0.00 113.00 103.50 354.50 562.50 2599.00
1987 603.00 404.00 398.00 146.00 85.00 9.00 10.50 0.00 4.50 59.50 403.00 617.50 2740.00
1988 562.50 367.50 322.00 247.00 191.00 79.00 3.50 0.00 17.50 58.00 394.00 576.50 2818.50
1989 598.00 555.00 387.50 167.50 162.50 15.50 10.00 0.00 z 34.00 179.50 376.00 568.00 3053.50
1990 583.50 533.50 352.50 149.50 186.50 28.50 3.50 3.50 4.00 105.50 441.50 756.50 3148.50
1991 565.50 309.00 529.50 329.50 205.00 62.00 0.00 2.50 0.50 110.00 356.00 592.00 3061.50
1992 582.00 352.50 321.00 163.00 24.50 43.00 1.50 0.00 0.50 80.00 391.50 626.50 2586.00
1993 633.00 506.50 293.00 298.50 130.50 66.00 1.00 2.50 20.00 87.50 454.50 632.50 3125.50
1994 536.00 514.50 310.00 252.00 129.50 46.00 0.00 0.50 17.50 179.00 571.00 659.50 3215.50
1995 485.00 328.50 476.50 322.00 214.00 99.00 9.00 3.00 14.50 110.00 258.50 471.00 2791.00
1996 534.00 388.00 306.50 243.00 118.00 17.50 0.00 0.00 13.00 192.00 362.00 513.00 2687.00
1997 526.00 426.00 322.00 244.00 64.00 32.50 2.00 0.00 14.00 189.00 342.50 582.50 2744.50
1998 497.00 496.50 391.50 322.00 294.00 22.00 2.50 0.00 25.50 211.50 450.00 651.50 3364.00
1999 577.00 532.50 524.00 301.00 190.00 65.50 9.50 6.00 0.00 z 113.50 342.50 578.50 3240.00
2000 555.00 419.00 372.00 a 214.50 155.00 a 23.50 8.00 1.50 29.50 173.00 485.00 550.50 2986.50
2001 626.72 a 513.50 294.00 365.69 a 40.50 38.00 3.00 0.00 z 8.50 82.67 a 372.50 552.00 2897.07
2002 622.58 a 387.00 423.50 245.17 a 163.50 13.00 0.00 0.00 z 36.00 183.50 341.50 537.00 2952.76
2003 398.50 436.50 353.50 436.00 168.00 18.00 0.00 1.50 12.00 75.50 486.00 568.50 2954.00
2004 555.50 485.50 200.50 0.00 z 120.00 27.50 0.00 0.00 32.00 199.50 434.00 559.00 2613.50
2005 579.50 396.00 314.00 333.00 0.00 z 88.50 0.00 0.00 44.00 155.50 376.00 522.00 2808.50
2006 549.00 429.00 585.00 323.89 c 91.45 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1978.34
Period of Record Statistics
MEAN 585.91 441.35 399.99 277.86 148.96 43.43 3.72 3.53 31.16 155.79 397.59 579.97 3069.78
S.D. 80.78 73.44 86.62 80.95 62.36 27.91 5.31 4.99 26.06 59.77 67.17 73.42 305.43
SKEW 0.51 -0.14 -0.18 0.38 0.47 0.92 1.67 2.24 1.19 0.59 -0.12 0.26 0.37
MAX 832.00 606.00 585.00 536.00 304.50 141.21 23.50 28.00 116.50 329.00 571.00 756.50 3848.00
MIN 398.50 249.50 147.50 133.00 24.50 0.50 0.00 0.00 0.00 53.50 212.50 431.00 2361.50
NO YRS 100 99 100 99 100 99 100 97 99 99 97 100 88