TRONA, CALIFORNIA

Monthly Total Heating Degree Days

(049035)

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
1920 258.50 n 410.50 339.50 101.00 14.50 0.00 0.00 0.00 3.50 165.50 407.00 681.50 2123.00
1921 689.00 378.00 195.00 151.00 78.00 1.50 0.00 0.00 0.00 63.00 336.00 525.50 2417.00
1922 785.50 541.50 376.00 197.00 31.00 0.00 0.00 0.00 0.00 69.00 498.50 541.00 3039.50
1923 647.00 488.00 295.50 125.50 7.00 4.00 0.00 0.00 7.00 105.50 314.00 623.50 2617.00
1924 818.00 348.50 413.50 94.50 0.00 0.00 0.00 0.00 0.00 122.50 387.50 707.00 2891.50
1925 692.00 326.00 270.00 120.50 4.00 8.00 0.00 0.00 0.50 73.00 431.50 553.00 2478.50
1926 652.50 356.00 141.50 59.50 8.00 0.00 0.00 0.00 2.00 7.50 242.00 652.00 2121.00
1927 656.00 389.00 301.00 130.00 22.00 0.00 0.00 0.00 0.00 41.50 311.50 681.00 2532.00
1928 657.00 437.50 183.00 76.00 7.00 0.00 0.00 0.00 0.00 84.50 385.00 716.50 2546.50
1929 713.00 533.50 271.50 169.00 0.00 3.50 0.00 0.00 0.00 59.50 360.00 524.50 2634.50
1930 712.00 330.50 272.00 56.00 93.50 0.00 0.00 0.00 6.00 100.00 380.50 838.00 2788.50
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 728.00 475.50 193.00 95.00 20.00 0.00 0.00 0.00 0.00 45.00 274.50 725.50 2556.50
1933 729.50 597.50 236.00 134.00 74.00 0.00 0.00 0.00 0.00 0.00 330.50 620.00 2721.50
1934 540.00 301.00 27.50 14.00 1.00 1.50 0.00 0.00 6.50 54.00 286.00 500.00 1731.50
1935 635.00 367.50 356.50 74.00 11.50 0.00 0.00 0.00 0.00 93.00 470.00 621.00 2628.50
1936 588.50 443.50 176.50 68.50 1.50 0.00 0.00 0.00 0.00 36.50 326.50 667.50 2309.00
1937 956.00 476.00 283.50 92.50 0.00 0.00 0.00 0.00 0.00 11.50 276.50 473.50 2569.50
1938 588.00 440.50 302.00 66.50 9.00 0.00 0.00 0.00 0.00 48.50 485.50 492.00 2432.00
1939 529.00 516.00 236.00 18.50 0.00 0.00 0.00 0.00 0.00 44.50 298.50 527.00 2169.50
1940 490.00 384.50 158.00 56.00 0.00 0.00 0.00 0.00 0.00 59.00 413.50 547.00 2108.00
1941 480.00 309.00 264.00 176.50 0.50 0.00 0.00 0.00 1.00 114.00 326.50 571.00 2242.50
1942 599.00 442.00 271.00 50.00 11.50 0.00 0.00 0.00 0.00 51.00 299.50 528.50 2252.50
1943 548.00 335.50 151.50 56.00 6.00 0.00 0.00 0.00 0.00 63.00 323.50 575.50 2059.00
1944 607.00 499.50 255.00 86.00 3.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 580.00 2030.50
1945 603.00 348.50 352.00 108.00 5.00 0.00 0.00 0.00 0.00 31.50 316.00 627.00 2391.00
1946 573.50 414.00 264.50 55.00 0.00 0.00 0.00 0.00 0.00 100.50 423.50 522.00 2353.00
1947 642.50 321.00 150.00 65.50 8.50 0.00 0.00 0.00 0.00 13.00 399.50 616.00 2216.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 8.50 41.50 310.20 e 674.50 1034.70
1949 869.00 519.00 296.50 42.50 13.50 0.00 0.00 0.00 a 0.00 92.00 160.86 a 631.88 a 2625.25
1950 665.00 285.50 194.50 46.50 31.50 0.00 a 0.00 0.00 0.00 3.50 181.50 376.13 a 1784.13
1951 559.00 378.00 246.00 74.50 16.50 0.00 0.00 0.00 0.00 45.00 329.50 618.00 2266.50
1952 708.50 408.50 310.50 h 78.50 0.00 1.50 0.00 a 0.00 a 2.07 a 3.00 g 399.11 b 656.68 a 2254.86
1953 521.66 b 486.50 260.50 100.50 56.00 2.50 0.00 0.00 0.00 64.50 94.50 m 407.00 l 1492.16
1954 531.43 c 239.50 345.00 24.44 c 14.50 4.00 0.00 0.00 0.00 49.00 236.50 654.00 2098.37
1955 701.93 c 484.40 c 238.50 159.11 b 50.00 0.50 0.00 0.00 1.00 10.00 338.50 492.50 2476.44
1956 469.50 477.00 232.50 107.00 6.00 0.00 0.00 0.00 0.00 72.00 419.44 c 612.50 2395.94
1957 679.00 264.50 169.50 69.50 32.00 0.00 0.00 0.00 a 0.00 a 60.00 387.00 608.00 2269.50
1958 537.00 293.50 391.50 143.00 1.50 0.00 0.00 0.00 1.00 18.50 327.00 549.50 2262.50
1959 457.25 c 360.00 f 147.50 5.50 27.00 0.00 a 0.00 0.00 0.00 a 19.50 307.00 558.00 1521.75
1960 706.50 465.50 160.00 82.50 12.50 0.00 0.00 0.00 0.00 49.00 361.50 618.50 2456.00
1961 645.50 363.00 229.00 71.50 11.00 2.00 0.00 0.00 0.00 82.00 378.00 657.50 2439.50
1962 686.00 414.00 393.50 10.50 33.00 2.59 a 0.00 0.00 0.00 14.50 265.00 636.00 2455.09
1963 729.00 210.52 a 301.50 189.50 6.72 a 0.00 0.00 0.00 0.00 8.50 295.00 656.50 2397.24
1964 665.98 a 520.00 359.50 141.50 73.00 3.00 0.00 0.00 0.00 18.00 425.17 a 500.00 2706.16
1965 578.00 385.26 a 280.00 221.50 35.00 1.00 0.00 0.00 4.50 16.00 268.00 661.00 2450.26
1966 709.00 538.00 247.50 45.50 2.00 0.00 0.00 a 0.00 0.00 a 52.91 b 296.38 a 592.50 2483.79
1967 612.50 381.50 210.00 346.00 45.50 9.50 0.00 0.00 0.00 5.50 174.50 704.00 2489.00
1968 628.00 348.50 240.00 102.00 14.50 1.50 0.00 w 0.00 1.50 26.50 293.50 751.50 2407.50
1969 520.00 529.00 343.00 90.00 32.00 8.00 0.00 0.00 0.00 75.50 308.00 593.50 2499.00
1970 608.00 356.50 220.74 b 192.41 a 1.00 0.00 0.00 a 0.00 0.00 92.00 297.00 637.50 2405.16
1971 661.00 354.50 301.00 86.50 42.50 9.00 0.00 0.00 12.00 135.50 343.00 719.50 2664.50
1972 662.00 388.00 118.12 b 93.00 11.50 0.00 0.00 0.00 0.00 78.50 385.50 697.50 2434.12
1973 704.00 431.93 a 374.00 83.50 6.50 0.00 0.00 0.00 0.00 38.50 338.00 556.50 2532.93
1974 627.50 440.00 224.50 82.00 23.50 0.00 0.00 0.00 0.00 38.50 306.50 0.00 z 1742.50
1975 597.50 445.50 378.00 261.50 32.50 0.00 0.00 0.00 0.00 89.00 367.00 539.00 2710.00
1976 569.00 366.00 275.00 151.50 1.00 0.00 0.00 0.00 0.00 29.00 215.50 658.50 2265.50
1977 625.00 327.00 410.00 47.50 87.50 0.00 0.00 0.00 0.00 21.50 265.50 445.00 2229.00
1978 517.50 357.00 186.50 121.50 4.00 0.00 0.00 0.00 0.50 18.50 358.50 743.50 2307.50
1979 691.00 427.50 235.50 0.00 z 0.00 z 0.00 0.00 a 0.00 0.00 35.50 374.50 335.00 k 1764.00
1980 369.50 293.50 65.00 x 85.50 11.00 l 0.00 m 0.00 0.00 0.00 64.50 297.00 494.50 1604.50
1981 552.00 361.00 134.50 i 43.50 2.00 0.00 0.00 0.00 0.00 71.00 0.00 z 0.00 z 1029.50
1982 608.00 294.00 284.50 90.00 13.00 0.00 0.00 0.00 6.50 36.50 416.50 598.50 2347.50
1983 638.50 404.50 246.00 155.50 14.50 0.00 0.00 0.00 2.50 4.50 252.50 481.50 2200.00
1984 487.00 381.00 166.50 112.50 0.50 0.00 0.00 0.00 0.00 94.00 258.00 681.50 2181.00
1985 631.50 390.50 296.50 22.50 0.00 0.00 0.00 0.00 7.50 23.50 363.00 572.00 2307.00
1986 402.50 255.00 131.00 65.00 7.50 0.00 0.00 0.00 8.00 26.50 226.50 569.50 1691.50
1987 653.00 323.50 239.00 28.50 2.00 0.00 0.00 0.00 0.00 11.00 285.00 664.00 2206.00
1988 572.50 310.50 133.00 72.50 40.00 6.00 0.00 0.00 2.50 0.00 250.00 585.50 1972.50
1989 637.50 392.50 102.00 28.00 9.50 0.00 0.00 0.00 1.00 76.50 219.50 592.50 2059.00
1990 575.00 393.00 145.50 4.50 0.00 0.00 0.00 0.00 0.00 4.50 222.50 725.00 2070.00
1991 636.00 232.50 395.50 52.50 24.28 a 0.00 0.00 0.00 0.00 61.50 217.50 544.00 2163.78
1992 593.50 269.00 153.50 7.50 0.00 0.00 0.00 z 0.00 0.00 0.00 243.50 605.00 1872.00
1993 557.00 332.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4.50 x 0.00 z 695.90 b 1584.90
1994 493.00 i 354.50 k 225.00 91.00 18.50 0.00 0.00 0.00 0.00 7.00 201.50 q 64.50 y 341.50
1995 0.00 z 0.00 z 187.50 o 99.50 31.50 21.00 0.00 0.00 0.00 11.50 94.50 375.50 633.50
1996 223.50 105.64 a 54.00 4.00 0.50 0.00 0.00 0.00 0.00 57.00 139.50 0.00 z 584.14
1997 356.50 a 201.00 59.50 48.62 a 0.00 z 0.00 a 0.00 0.00 0.00 b 0.00 116.38 a 409.50 1191.50
1998 394.22 a 342.50 174.00 109.00 7.23 a 0.00 0.00 0.00 0.00 a 23.00 411.00 497.03 a 1957.98
1999 422.63 a 0.00 z 269.50 181.00 h 0.00 c 2.50 f 0.00 0.00 0.00 0.00 c 147.50 372.00 b 1211.63
2000 359.17 b 320.00 185.47 b 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 54.50 372.00 481.00 1772.14
2001 616.50 478.92 d 173.60 a 138.00 0.00 0.00 0.00 a 0.00 0.00 3.00 169.82 b 517.18 a 2097.02
2002 0.00 z 322.50 256.00 47.50 8.00 0.00 k 0.00 z 0.00 0.00 d 15.50 193.00 501.50 1344.00
2003 357.50 382.50 g 509.50 470.50 146.50 0.00 0.00 0.00 0.00 73.00 770.50 957.00 3284.50
2004 962.00 783.00 0.00 z 39.00 t 46.50 0.00 z 0.00 0.00 1.00 89.50 347.00 551.00 2780.00
2005 491.50 363.00 189.00 92.50 12.00 0.00 0.00 0.00 0.00 15.50 220.50 511.00 1895.00
2006 528.50 359.50 364.50 106.00 0.50 0.00 0.00 0.00 0.00 34.50 201.50 623.50 2218.50
2007 641.00 321.00 106.43 a 54.00 0.50 0.00 0.00 0.00 2.50 22.00 177.00 656.00 1980.43
2008 629.50 402.00 155.50 58.00 17.50 0.00 0.00 0.00 0.00 27.50 198.50 588.50 2077.00
2009 520.50 423.50 244.50 112.00 0.00 e 0.00 0.00 0.00 0.00 58.00 256.00 657.00 2271.50
2010 581.50 351.00 236.38 c 167.50 24.50 0.00 0.00 0.00 0.00 40.00 315.50 499.00 2215.38
2011 563.88 b 461.00 245.00 83.28 a 43.00 0.00 a 0.00 a 0.00 c 0.00 c 44.95 a 372.50 637.50 2451.11
2012 539.63 d 383.00 224.00 96.21 a 3.50 0.00 a 0.00 a 0.00 0.00 a 33.14 b 250.34 a 512.07 d 2041.89
2013 694.29 b 425.70 a 143.00 0.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 28.00 z 1263.00
Period of Record Statistics
MEAN 603.38 388.18 242.47 96.66 18.76 1.07 0.00 0.00 0.98 46.52 310.58 595.26 2333.05
S.D. 120.99 96.46 90.36 71.12 25.46 3.01 0.00 0.00 2.32 34.90 98.87 98.10 263.90
SKEW -0.05 0.56 0.22 2.35 2.40 4.31 0.00 0.00 2.74 0.78 0.94 0.36 -0.04
MAX 962.00 783.00 509.50 470.50 146.50 21.00 0.00 0.00 12.00 165.50 770.50 957.00 3039.50
MIN 223.50 105.64 27.50 4.00 0.00 0.00 0.00 0.00 0.00 0.00 94.50 372.00 1691.50
NO YRS 88 87 86 86 86 85 88 91 91 89 87 86 70