CHICO UNIV FARM, CALIFORNIA

Monthly Total Heating Degree Days

(041715)

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
1906 265.50 n 312.00 383.00 187.50 127.62 a 27.50 0.00 0.00 1.00 83.50 378.00 512.00 2012.12
1907 636.50 313.50 453.00 142.50 85.50 23.50 0.00 0.00 4.00 46.00 328.50 547.50 2580.50
1908 521.00 485.00 350.00 131.50 114.00 15.50 0.00 0.00 8.00 l 139.50 311.00 689.00 2756.50
1909 480.00 450.50 441.50 141.00 76.00 3.50 0.00 0.00 5.00 110.05 a 344.48 a 676.50 2728.53
1910 689.00 497.50 257.00 106.07 b 35.50 3.00 q 0.00 0.00 6.50 g 60.00 h 296.00 515.12 a 2396.19
1911 574.50 535.50 298.00 238.50 119.50 0.00 0.00 0.00 15.00 117.50 338.00 584.50 2821.00
1912 521.50 374.00 412.00 282.50 61.50 3.00 0.00 0.00 21.00 193.00 345.00 606.00 2819.50
1913 682.00 451.77 b 407.50 207.00 67.50 0.00 0.00 0.00 5.00 80.00 371.50 599.50 2871.77
1914 525.00 428.50 205.50 135.50 12.00 17.00 0.00 0.00 13.00 90.00 308.50 663.50 2398.50
1915 617.50 431.50 267.50 175.50 143.50 0.00 0.00 0.00 7.50 69.50 376.00 557.50 2646.00
1916 686.00 345.00 278.00 115.34 a 88.50 3.50 0.00 f 0.50 0.00 188.50 496.50 656.50 2858.34
1917 710.50 434.00 487.50 260.00 129.50 2.50 0.00 0.00 22.50 48.50 348.50 508.00 2951.50
1918 578.00 489.50 403.00 230.00 74.50 0.00 0.00 0.50 8.00 115.50 460.00 666.50 3025.50
1919 596.00 486.00 433.00 155.00 14.50 1.50 0.00 0.00 28.50 196.50 411.50 666.00 2988.50
1920 501.00 410.50 445.00 253.00 72.00 2.50 0.00 0.00 15.50 214.50 439.00 601.06 d 2954.06
1921 617.50 442.00 323.50 250.50 115.50 3.00 0.00 0.00 13.00 83.00 346.00 541.00 2735.00
1922 759.50 533.00 479.50 289.50 80.50 0.00 0.00 0.00 4.50 144.50 520.50 542.00 3353.50
1923 569.50 465.50 349.50 245.00 73.50 31.50 0.00 0.00 36.50 158.00 311.00 726.00 2966.00
1924 805.00 411.00 498.50 192.50 31.50 2.50 0.00 2.00 12.00 183.50 438.50 772.00 3349.00
1925 592.50 386.50 289.00 177.41 a 28.50 17.00 0.00 0.00 18.50 140.50 455.50 629.00 2734.41
1926 736.00 401.00 160.00 102.00 44.50 0.00 0.00 0.00 30.50 92.00 252.00 596.50 2414.50
1927 560.00 405.50 357.00 226.50 80.50 0.00 0.00 0.00 11.50 68.00 337.00 651.00 2697.00
1928 602.00 430.50 246.00 195.00 13.00 0.00 0.00 0.00 10.50 116.00 395.00 667.50 2675.50
1929 676.00 476.00 340.00 262.00 29.00 24.00 0.00 0.00 16.00 43.00 271.00 451.50 2588.50
1930 661.50 316.50 276.00 118.00 85.00 0.00 0.00 0.00 17.50 109.50 253.00 589.00 2426.00
1931 535.50 347.00 233.50 95.50 0.00 0.00 0.00 0.00 4.50 79.50 406.50 612.00 2314.00
1932 608.00 492.50 235.50 208.50 66.50 11.00 0.00 0.00 0.00 102.50 243.50 766.50 2734.50
1933 736.50 537.00 328.50 147.50 162.50 7.50 0.00 0.00 5.00 40.50 335.00 658.75 a 2958.75
1934 581.50 390.00 154.00 78.50 17.50 11.00 0.00 0.00 23.00 95.00 328.00 519.00 2197.50
1935 615.50 430.00 470.00 205.00 50.00 0.00 0.00 0.00 1.00 157.50 449.50 580.50 2959.00
1936 537.00 464.50 313.00 159.00 50.50 21.00 0.00 0.00 7.00 58.00 314.50 637.50 2562.00
1937 899.52 a 538.00 368.00 251.00 37.50 8.00 0.00 a 0.00 2.50 69.50 321.00 518.00 3013.02
1938 611.00 483.50 463.00 248.00 59.00 1.00 0.00 0.00 0.00 134.00 447.00 582.00 3028.50
1939 609.00 546.50 339.50 55.00 48.50 18.00 0.00 0.00 9.00 122.00 324.50 513.00 2585.00
1940 576.50 413.50 330.00 195.00 54.00 0.00 0.00 0.00 3.50 113.50 444.00 510.00 2640.00
1941 547.00 396.00 320.50 269.50 66.50 6.50 0.00 1.50 21.00 168.00 355.86 a 570.50 2722.86
1942 684.87 d 513.50 401.00 264.00 155.00 2.00 0.00 0.00 0.00 90.50 380.50 617.00 3108.37
1943 600.00 404.00 342.00 196.00 86.50 24.00 0.00 0.00 0.00 148.50 343.00 593.50 2737.50
1944 633.00 508.00 348.00 288.50 70.50 20.00 0.00 0.00 2.00 34.00 447.50 511.50 2863.00
1945 656.50 413.50 497.50 221.50 91.00 3.00 0.00 0.00 10.50 71.50 418.00 617.00 3000.00
1946 662.50 545.50 418.00 170.00 50.00 4.00 0.00 2.00 1.50 165.50 435.00 607.50 3061.50
1947 713.50 391.50 310.00 156.00 25.50 6.00 0.00 1.00 5.00 123.00 466.00 653.00 2850.50
1948 504.50 528.50 508.00 362.50 163.00 16.50 4.50 0.00 34.50 91.00 401.00 698.00 3312.00
1949 853.00 544.00 415.50 97.80 e 64.50 0.50 0.00 0.00 3.50 156.00 241.50 671.50 3047.80
1950 715.50 422.50 403.50 166.00 103.00 25.50 0.00 0.00 7.00 111.50 258.50 526.00 2739.00
1951 653.50 486.50 397.50 182.00 88.00 4.00 0.00 0.00 2.50 153.50 367.50 616.50 2951.50
1952 687.50 469.50 497.00 180.00 57.50 36.50 0.00 0.00 14.50 36.00 444.50 592.50 3015.50
1953 450.00 435.50 416.00 240.00 181.00 30.50 0.00 8.00 1.00 133.50 335.50 531.50 2762.50
1954 601.00 464.00 471.50 162.50 31.00 25.00 0.00 3.00 12.00 126.00 410.00 711.00 3017.00
1955 726.00 531.50 398.50 364.00 78.50 9.00 0.00 0.00 18.00 91.50 427.00 546.50 3190.50
1956 575.00 597.50 387.50 220.50 88.50 4.50 1.50 0.00 0.50 178.50 349.50 611.00 3014.50
1957 687.00 378.50 349.50 215.00 84.50 0.00 0.00 3.50 4.50 173.50 458.00 638.50 2992.50
1958 612.00 322.50 474.00 213.00 28.50 2.00 0.00 0.00 6.50 47.00 319.00 398.00 2422.50
1959 491.00 447.00 280.00 82.00 78.00 0.00 0.00 0.00 12.00 45.00 305.00 585.50 2325.50
1960 620.00 447.00 286.50 185.00 88.50 0.00 0.00 0.00 0.00 88.00 369.50 622.50 2707.00
1961 684.00 394.00 389.00 180.00 84.50 0.00 0.00 0.00 3.00 142.50 415.00 671.50 2963.50
1962 645.50 489.50 445.00 89.00 71.00 3.00 0.00 0.00 3.00 98.00 333.00 576.50 2753.50
1963 718.00 239.50 424.50 336.00 65.00 0.00 0.00 0.00 0.00 94.50 425.50 751.00 3054.00
1964 640.00 478.00 418.00 208.50 96.50 29.00 1.50 2.50 8.50 61.00 475.00 487.00 2905.50
1965 625.50 468.00 350.00 219.50 66.00 9.50 0.00 0.00 27.00 50.50 331.00 729.50 2876.50
1966 610.50 506.50 347.50 86.00 8.50 8.00 0.00 0.00 3.00 75.50 339.00 597.50 2582.00
1967 580.50 450.50 412.00 469.00 96.50 35.00 0.00 0.00 0.00 42.50 257.50 610.50 2954.00
1968 651.00 284.00 306.00 177.00 57.50 0.00 0.00 1.50 10.50 101.00 408.00 676.50 2673.00
1969 666.50 523.00 398.50 221.00 20.50 0.00 0.00 0.00 1.50 165.00 351.00 509.00 2856.00
1970 488.50 361.00 329.50 281.00 40.00 6.50 0.00 0.00 7.00 160.00 330.50 620.50 2624.50
1971 609.50 469.00 404.00 236.00 108.00 9.00 0.00 0.00 24.50 233.00 398.50 706.50 3198.00
1972 730.50 410.50 230.43 a 203.00 51.50 7.00 0.00 0.00 24.00 140.50 452.50 772.00 3021.93
1973 672.00 388.00 450.00 168.00 0.00 z 0.52 a 0.00 b 0.00 b 5.50 0.00 z 0.00 z 402.50 h 1684.02
1974 335.00 k 0.00 z 170.00 l 288.00 57.50 5.50 6.50 0.00 0.00 c 66.50 413.04 b 650.00 1487.04
1975 689.00 493.50 452.50 410.69 a 88.87 a 12.50 0.50 0.00 0.00 207.50 454.00 600.76 b 3409.81
1976 638.00 454.50 436.00 306.35 d 12.00 11.00 0.00 6.41 b 16.50 80.27 c 298.93 b 597.00 2856.96
1977 748.50 374.89 a 460.50 126.50 200.00 3.50 0.00 0.00 24.50 67.00 382.00 508.50 2895.89
1978 494.50 423.50 252.28 b 292.50 b 59.42 a 0.00 0.00 a 8.61 d 25.00 f 16.00 g 412.50 b 579.00 g 1943.30
1979 631.48 d 479.00 343.67 b 210.50 f 75.84 c 0.00 z 0.00 b 0.00 b 2.59 a 130.09 c 0.00 z 395.50 i 1662.67
1980 0.00 z 409.62 a 400.86 b 127.50 g 94.15 d 0.00 z 0.50 j 0.00 z 5.00 m 80.00 i 203.00 l 0.00 z 904.64
1981 318.00 l 388.08 c 406.58 e 95.50 l 54.77 a 0.00 h 1.00 j 0.00 16.20 e 158.50 h 174.50 n 327.50 k 865.62
1982 500.00 j 424.50 404.50 282.00 24.91 c 7.00 i 0.00 j 0.00 a 28.50 127.50 451.00 611.50 2354.41
1983 683.00 418.50 374.00 322.50 108.50 1.50 2.00 j 0.00 j 3.00 14.50 q 403.00 380.50 i 2314.00
1984 600.50 511.50 267.00 250.50 43.40 a 15.00 0.00 1.50 4.00 219.67 b 440.50 418.50 j 2353.57
1985 733.31 b 436.00 482.50 128.28 a 67.17 a 22.50 0.00 0.00 32.50 143.00 499.50 725.29 b 3270.05
1986 504.50 351.50 248.50 188.50 76.00 1.50 0.00 0.00 93.00 95.00 304.00 638.50 2501.00
1987 709.50 436.00 390.50 91.00 27.50 0.00 5.50 1.00 2.00 33.00 387.50 606.00 2689.50
1988 591.00 359.00 319.50 169.50 117.50 36.50 0.00 0.00 2.00 0.00 z 352.00 572.50 2519.50
1989 667.50 514.00 333.50 118.50 58.00 2.50 0.00 0.00 19.00 139.00 356.50 605.00 2813.50
1990 607.50 554.00 295.50 73.50 69.00 11.50 0.00 0.00 0.00 36.00 i 425.50 448.00 k 2036.50
1991 618.50 307.50 500.00 258.00 126.50 10.50 0.00 0.00 0.50 30.50 n 325.50 633.50 2780.50
1992 691.50 318.50 292.00 106.50 2.50 21.00 1.50 0.00 0.00 53.50 366.50 654.00 2507.50
1993 655.00 500.00 0.00 z 0.00 z 46.00 30.00 0.00 0.00 1.50 37.00 j 429.00 639.50 2301.00
1994 569.50 504.50 289.50 171.00 68.50 3.00 0.00 0.00 1.50 132.50 575.50 682.00 2997.50
1995 496.00 363.50 424.00 231.00 123.50 33.00 0.00 0.00 4.00 62.50 218.50 501.50 2457.50
1996 566.00 384.00 319.00 193.50 68.00 1.50 0.00 0.00 3.50 177.00 340.50 506.00 2559.00
1997 566.00 421.00 259.00 177.00 17.00 1.50 0.00 0.00 2.00 111.50 344.00 612.50 2511.50
1998 535.00 473.00 340.00 265.50 180.00 8.00 0.00 0.00 14.00 123.50 406.00 670.50 3015.50
1999 655.00 522.00 443.50 237.50 86.00 32.50 0.00 0.00 a 0.00 b 64.50 192.50 j 581.00 2622.00
2000 558.50 430.70 b 332.45 b 124.82 b 102.50 1.61 b 0.00 d 0.53 b 13.50 110.00 j 390.50 f 457.50 g 1564.61
2001 625.17 a 487.85 b 264.03 b 277.50 d 5.74 d 3.50 f 0.00 j 0.00 k 0.00 l 29.00 l 325.80 e 289.00 o 1986.09
2002 624.50 391.00 409.00 155.50 59.50 j 0.00 z 0.00 0.00 3.00 65.50 n 148.50 o 209.50 r 1583.00
2003 280.50 k 436.50 242.00 g 243.00 f 52.50 l 0.00 i 0.00 l 0.00 j 0.00 j 14.50 i 238.50 l 291.00 n 436.50
2004 390.50 k 278.50 j 110.00 j 109.50 h 10.50 l 0.00 j 0.00 n 0.00 n 2.50 i 93.00 m 243.00 k 199.50 r 0.00
2005 373.00 l 237.00 h 144.00 n 100.00 m 46.00 m 0.00 z 0.00 m 0.00 i 1.50 j 44.50 j 157.50 l 227.00 s 0.00
2006 313.50 k 252.00 j 325.00 j 149.50 j 1.00 l 2.00 k 0.00 o 0.00 n 4.00 k 108.00 l 225.00 l 198.50 r 0.00
2007 281.50 p 173.00 q 84.50 p 97.00 n 21.00 r 6.50 k 0.00 m 0.00 r 15.50 m 29.00 n 97.50 p 251.50 p 0.00
2008 0.00 z 0.00 z 0.00 z 134.50 l 16.50 n 0.00 u 0.00 k 0.00 l 2.50 j 44.00 j 158.50 o 240.50 s 0.00
2009 280.50 p 290.50 i 215.50 n 104.00 m 16.00 q 0.50 j 0.00 n 0.00 r 3.00 k 119.50 j 214.00 n 269.50 s 0.00
2010 340.50 n 216.50 m 206.50 p 159.50 o 113.50 l 2.00 p 0.00 l 0.00 r 20.50 i 92.00 k 194.50 m 188.00 r 0.00
2011 315.50 p 192.50 p 204.50 o 133.00 k 83.00 o 41.00 k 0.00 m 0.00 h 0.00 p 74.50 m 144.00 s 294.00 p 0.00
2012 175.00 u 264.50 j 244.00 l 94.50 r 7.50 k 18.00 l 0.00 p 0.00 j 0.00 o 57.50 k 153.50 q 185.50 t 0.00
2013 384.50 m 246.00 m 103.00 s 2.50 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
Period of Record Statistics
MEAN 626.76 439.49 364.66 202.35 72.16 9.43 0.24 0.47 10.14 112.29 374.51 608.54 2822.45
S.D. 82.16 68.75 81.50 77.08 41.83 10.86 1.03 1.48 12.83 49.16 68.81 74.46 260.13
SKEW 0.42 -0.33 -0.29 0.59 0.70 1.08 4.91 4.11 3.29 0.36 0.12 -0.05 -0.05
MAX 899.52 597.50 508.00 469.00 200.00 36.50 6.50 8.61 93.00 233.00 575.50 772.00 3409.81
MIN 450.00 239.50 154.00 55.00 0.00 0.00 0.00 0.00 0.00 33.00 218.50 398.00 2197.50
NO YRS 92 97 95 93 95 90 91 94 92 84 90 86 76