TUCSON WFO, ARIZONA

Monthly Total Heating Degree Days

(028815)

Base Temperature = 65 F

File last updated on Apr 3, 2013
*** Note *** Provisional Data *** After Year/Month 200801
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
1894 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 13.95 a 64.50 312.00 390.45
1895 403.50 311.00 219.00 48.46 d 0.00 1.50 0.00 a 0.00 0.00 23.00 298.00 508.50 1812.96
1896 42.50 z 142.00 r 158.00 85.50 5.50 0.00 f 0.00 0.00 0.00 36.50 208.50 351.16 b 845.16
1897 479.00 401.00 340.50 65.00 0.00 0.00 0.00 b 0.00 c 0.00 d 78.50 159.00 499.00 2022.00
1898 585.00 218.00 286.23 a 47.00 15.00 r 0.00 h 0.00 0.00 0.00 27.00 331.50 550.50 2045.23
1899 571.50 440.50 266.50 52.50 46.50 12.00 0.00 0.00 0.00 79.50 212.00 420.00 2101.00
1900 375.50 360.00 108.50 197.00 3.00 0.00 0.00 0.00 0.00 37.50 161.50 416.00 1659.00
1901 437.00 366.00 294.50 157.00 9.00 0.00 0.00 0.00 0.00 25.00 118.00 451.00 1857.50
1902 452.00 348.50 338.50 37.50 19.00 0.00 0.00 a 0.00 0.00 2.00 301.00 457.00 1955.50
1903 499.00 551.00 308.50 116.50 6.50 0.00 0.00 0.00 0.00 25.00 150.50 405.77 c 2062.77
1904 606.50 258.00 160.50 82.50 12.00 0.00 0.00 0.00 1.50 51.50 191.50 533.50 1897.50
1905 505.50 389.41 a 339.00 201.00 86.00 0.00 0.00 0.00 3.50 21.00 226.00 554.00 2325.41
1906 446.00 277.50 210.00 132.50 17.00 0.00 0.00 0.00 0.00 58.50 243.00 358.50 1743.00
1907 424.00 253.50 226.00 60.50 12.50 0.00 0.00 0.00 0.00 12.00 215.00 420.50 1624.00
1908 430.00 395.00 201.50 64.50 34.50 0.50 0.00 0.00 0.00 134.50 221.00 432.00 1913.50
1909 348.50 407.00 371.00 83.50 15.50 0.00 0.00 0.00 0.00 26.50 248.50 543.50 2044.00
1910 464.00 416.50 104.50 52.50 0.00 0.00 0.00 0.00 0.00 32.00 213.00 386.50 1669.00
1911 321.50 371.50 87.50 40.00 2.00 0.00 0.00 0.00 0.00 48.00 421.55 a 620.50 1912.55
1912 448.00 386.50 283.00 201.00 29.50 0.00 0.00 a 0.00 0.00 67.00 237.00 595.00 2247.00
1913 627.50 414.00 345.50 74.50 22.00 0.00 0.00 0.00 7.50 17.50 177.00 501.00 2186.50
1914 346.00 355.00 145.00 35.50 18.50 0.00 0.00 0.00 0.00 31.00 146.00 552.83 a 1629.83
1915 564.50 391.50 342.50 133.50 80.50 0.00 h 0.00 0.00 b 0.00 0.00 z 0.00 z 95.00 z 1512.50
1916 443.00 216.98 a 151.50 107.00 6.00 0.00 0.00 0.00 0.00 a 44.50 293.00 557.50 1819.48
1917 510.00 417.00 358.50 126.50 31.50 0.00 0.00 a 0.00 0.00 a 21.50 153.50 371.00 1989.50
1918 536.30 a 291.50 150.50 81.50 13.50 0.00 0.00 0.00 0.00 a 50.00 287.50 496.50 1907.30
1919 538.00 474.00 316.00 65.50 15.50 0.00 0.00 0.00 0.00 67.50 238.00 379.00 2093.50
1920 408.50 286.00 316.00 195.50 4.50 0.00 0.00 0.00 0.52 a 140.07 d 243.50 548.00 2142.59
1921 445.50 312.00 142.50 136.00 23.00 1.00 0.00 0.00 0.00 47.50 207.00 329.00 1643.50
1922 526.00 347.50 326.00 162.50 17.50 0.00 0.00 0.00 0.00 46.00 358.50 353.00 2137.00
1923 338.50 316.50 280.00 63.00 2.00 0.00 0.00 0.00 0.00 52.50 271.50 470.50 1794.50
1924 504.00 307.50 384.92 a 120.50 0.00 0.00 0.00 0.00 0.00 23.00 198.00 452.50 1990.42
1925 539.00 242.50 169.00 81.50 0.00 0.00 a 0.00 d 0.00 0.00 38.50 262.76 a 455.00 1788.26
1926 583.50 274.00 175.50 81.00 8.50 0.00 0.00 a 0.00 0.00 5.50 182.50 447.50 1758.00
1927 314.50 239.50 248.00 106.50 19.50 0.00 0.00 0.00 0.00 b 16.50 105.50 523.38 a 1573.38
1928 439.00 378.00 153.50 109.50 7.50 0.00 c 0.00 a 0.00 0.00 23.50 227.50 469.50 1808.00
1929 526.50 428.50 292.00 107.00 1.00 0.00 0.00 0.00 0.00 81.00 335.00 379.00 2150.00
1930 471.50 256.50 261.50 37.00 53.50 0.00 a 0.00 0.00 0.00 18.50 246.00 455.70 a 1800.20
1931 473.00 321.00 227.00 16.50 0.00 0.00 0.00 0.00 0.00 29.50 354.50 512.00 1933.50
1932 673.50 301.50 236.00 99.83 a 15.50 2.00 0.00 0.00 a 0.00 53.00 158.00 554.00 2093.33
1933 540.00 489.50 224.50 143.00 66.65 a 0.00 a 0.00 0.00 0.00 0.00 182.50 396.00 2042.15
1934 483.50 242.00 68.00 42.50 3.50 0.00 0.00 0.00 0.00 a 19.63 a 279.00 410.20 c 1548.33
1935 399.50 281.50 308.00 62.50 40.50 0.00 0.00 0.00 0.00 57.00 314.00 418.50 1881.50
1936 502.50 345.00 191.00 83.00 6.50 0.00 0.00 0.00 5.00 40.76 d 173.28 a 441.00 1788.04
1937 736.50 342.50 283.50 86.50 2.00 0.00 0.00 0.00 0.00 0.00 171.11 c 333.00 1955.11
1938 390.50 303.50 235.50 65.69 a 22.50 0.00 0.00 0.00 0.00 20.00 0.00 z 370.00 1407.69
1939 453.00 546.00 204.50 37.50 0.00 a 0.00 0.00 0.00 0.00 a 19.50 117.00 279.50 1657.00
1940 388.00 353.50 168.50 60.50 0.00 h 0.00 0.00 0.00 0.00 a 11.33 e 270.50 277.50 1529.83
1941 393.50 222.00 231.50 158.50 27.00 0.00 0.00 0.00 0.00 55.00 193.00 421.00 1701.50
1942 399.50 396.00 310.00 76.00 6.50 0.00 0.00 0.00 0.00 57.50 167.00 425.00 1837.50
1943 430.50 256.00 191.00 58.50 6.95 b 0.00 0.00 0.00 0.00 53.00 192.50 346.00 f 1188.45
1944 510.50 406.00 267.50 76.50 3.50 0.00 0.00 0.00 0.00 4.00 312.50 452.50 2033.00
1945 390.50 f 340.00 305.00 111.00 0.00 0.00 0.00 0.00 5.50 22.00 288.00 523.00 1594.50
1946 557.00 395.50 192.50 23.00 0.00 0.00 0.00 0.00 0.00 90.50 372.50 395.00 2026.00
1947 559.50 270.00 218.00 80.50 2.00 0.00 0.00 0.00 0.00 29.00 271.00 f 534.50 1693.50
1948 433.00 403.00 340.50 41.50 0.50 0.00 0.00 0.00 0.00 13.50 338.50 392.50 1963.00
1949 657.50 395.50 199.00 54.50 0.00 0.00 0.00 0.00 0.00 85.50 82.00 438.00 1912.00
1950 445.50 224.50 154.50 20.50 16.00 0.00 0.00 0.00 0.00 0.00 66.50 230.00 1157.50
1951 414.00 272.50 192.50 53.00 17.50 0.00 0.00 0.00 0.00 18.00 162.50 403.00 1533.00
1952 355.00 357.50 368.50 51.00 0.00 0.00 0.00 0.00 0.00 0.00 267.50 437.00 1836.50
1953 325.50 321.50 149.00 65.50 42.00 0.00 0.00 0.00 0.00 35.00 154.00 486.00 1578.50
1954 352.00 136.50 176.50 7.00 5.17 a 0.00 0.00 0.00 0.00 28.00 154.00 392.50 1251.67
1955 581.00 458.00 201.00 101.00 15.00 0.00 0.00 0.00 0.00 4.50 206.00 306.00 1872.50
1956 269.50 449.50 149.00 72.50 0.00 0.00 0.00 0.00 0.00 34.00 201.50 359.00 1535.00
1957 310.50 124.50 137.50 53.50 18.50 0.00 0.00 0.00 0.00 29.50 293.50 291.50 1259.00
1958 391.00 249.00 314.50 98.00 0.00 0.00 0.00 0.00 0.00 17.50 174.50 247.50 1492.00
1959 289.50 316.50 153.50 0.00 8.00 0.00 0.00 0.00 0.00 a 33.00 146.50 353.50 1300.50
1960 483.50 423.50 84.50 28.00 2.50 0.00 0.00 0.00 0.00 d 25.00 135.50 423.50 1606.00
1961 301.00 273.00 135.00 20.00 1.00 0.00 0.00 0.00 0.00 46.50 251.00 408.50 1436.00
1962 416.00 233.50 295.50 4.14 a 3.00 0.00 0.00 0.00 0.00 6.50 132.93 a 318.00 1409.57
1963 496.50 219.00 220.10 a 78.50 0.00 0.00 0.00 a 0.00 0.00 a 3.32 c 186.50 370.00 1573.92
1964 523.50 467.50 316.09 c 105.00 24.50 0.00 a 0.00 a 0.00 0.00 1.00 281.00 378.20 a 2096.79
1965 356.50 a 351.04 a 267.63 a 97.00 18.08 a 0.00 0.00 0.00 0.54 b 20.67 a 0.00 z 0.00 z 1111.46
1966 496.00 443.00 157.00 19.50 0.00 0.00 0.00 0.00 0.00 16.50 144.50 437.50 1714.00
1967 480.50 288.81 a 112.12 a 102.41 a 21.00 0.00 0.00 a 0.00 0.00 8.00 82.00 422.50 1517.35
1968 327.00 122.50 135.00 63.00 3.00 0.00 c 0.00 b 0.00 0.00 5.50 208.50 426.50 1291.00
1969 267.50 292.50 281.50 6.00 24.59 b 0.00 0.00 0.00 0.00 24.00 131.25 b 300.50 1327.84
1970 396.00 157.00 248.50 105.00 5.50 0.00 0.00 0.00 0.00 43.50 89.50 339.50 1384.50
1971 402.00 278.50 146.50 71.00 1.50 0.00 0.00 0.00 0.00 92.50 184.50 465.00 1641.50
1972 360.00 189.00 60.00 28.50 0.00 0.00 0.00 0.00 0.00 50.00 259.00 385.00 1331.50
1973 403.50 240.00 315.00 96.50 9.50 0.00 0.00 0.00 0.00 3.50 150.00 297.50 1515.50
1974 342.00 255.50 108.50 26.50 5.00 0.00 0.00 0.00 0.00 34.00 112.50 h 473.55 b 1245.05
1975 384.50 305.50 206.27 e 118.85 d 9.50 0.00 0.00 0.00 0.00 20.50 159.00 335.50 1539.62
1976 328.50 149.00 173.00 80.50 1.50 0.00 0.00 0.00 0.00 42.50 157.00 331.00 1263.00
1977 407.00 234.50 266.50 56.00 2.50 0.00 0.00 0.00 0.00 0.00 94.00 182.50 1243.00
1978 320.00 273.50 119.00 41.00 19.00 0.00 0.00 0.00 0.00 9.00 192.00 466.50 1440.00
1979 514.00 283.00 202.50 55.50 11.50 0.00 0.00 0.00 0.00 20.50 204.50 233.00 1524.50
1980 273.50 171.00 164.00 53.50 0.50 0.00 0.00 0.00 0.00 31.50 116.50 116.00 926.50
1981 211.50 147.50 157.00 15.50 0.00 0.00 0.00 0.00 0.00 19.00 73.50 242.00 866.00
1982 384.00 199.00 144.50 7.50 1.50 0.00 0.00 0.00 0.00 17.50 137.00 373.00 1264.00
1983 309.50 250.50 186.00 125.00 2.50 0.00 0.00 0.00 0.00 0.00 195.00 291.50 1360.00
1984 346.50 263.50 76.50 71.50 0.00 0.00 0.00 0.00 0.00 28.00 213.00 389.00 1388.00
1985 395.00 273.50 139.00 24.00 0.00 0.00 0.00 0.00 0.00 4.50 235.00 309.50 1380.50
1986 131.50 191.00 107.50 14.00 1.50 0.00 0.00 0.00 0.00 5.50 112.00 344.00 907.00
1987 393.50 227.00 176.50 14.50 0.00 0.00 0.00 0.00 0.00 0.00 128.50 396.00 1336.00
1988 367.00 175.50 141.50 53.00 8.00 0.00 0.00 0.00 0.00 0.00 197.50 351.50 1294.00
1989 411.00 153.00 67.50 1.50 2.00 0.00 0.00 0.00 0.00 26.00 89.00 337.50 1087.50
1990 399.00 331.50 159.50 19.50 2.50 0.00 0.00 0.00 0.00 3.00 129.00 396.50 1440.50
1991 362.00 123.00 253.00 29.50 0.00 0.00 0.00 0.00 0.00 50.00 187.50 305.50 1310.50
1992 375.00 158.50 137.00 15.00 0.00 0.00 0.00 0.00 0.00 0.00 210.00 356.50 1252.00
1993 219.00 218.00 80.00 8.50 0.00 0.00 0.00 0.00 0.00 0.00 83.50 307.00 916.00
1994 308.50 222.50 68.00 18.00 0.00 0.00 0.00 0.00 0.00 6.50 180.00 261.00 1064.50
1995 297.50 66.50 81.50 70.00 11.50 0.00 0.00 0.00 0.00 0.00 37.00 275.00 839.00
1996 279.50 127.50 86.50 10.00 0.00 0.00 0.00 0.00 0.00 78.50 121.00 316.00 1019.00
1997 362.50 253.50 45.00 0.00 z 0.00 0.00 0.00 0.00 0.00 z 28.50 0.00 z 0.00 z 689.50
1998 367.00 400.08 b 230.00 136.50 1.00 0.00 0.00 0.00 0.00 16.00 141.50 395.50 1687.58
1999 336.00 218.00 118.83 a 170.00 c 5.50 0.00 0.00 0.00 0.00 0.50 67.78 c 425.70 c 1342.31
2000 295.05 c 186.00 159.50 18.00 0.00 c 0.00 0.00 0.00 0.00 53.50 351.00 326.00 1389.05
2001 453.00 317.00 147.00 82.50 0.00 0.00 0.00 0.00 0.00 0.00 126.00 457.50 1583.00
2002 375.50 201.00 172.00 2.00 0.00 0.00 0.00 0.00 0.00 18.00 105.00 410.00 1283.50
2003 197.00 263.50 165.00 51.00 0.00 0.00 0.00 0.00 0.00 0.00 167.50 335.50 1179.50
2004 336.50 369.50 81.00 38.50 0.00 0.00 0.00 0.00 0.00 31.50 246.00 347.50 1450.50
2005 295.50 222.50 154.00 21.00 0.00 0.00 z 0.00 0.00 0.00 0.00 0.00 z 305.50 998.50
2006 301.50 164.00 172.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 87.00 411.50 1136.00
2007 0.00 z 227.00 110.50 29.50 0.00 0.00 0.00 0.00 0.00 0.00 59.00 464.50 890.50
2008 377.50 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 0.00 z 0.00 z 377.50
Period of Record Statistics
MEAN 417.47 296.61 202.57 69.82 10.44 0.16 0.00 0.00 0.21 29.24 194.25 398.87 1622.92
S.D. 105.40 98.47 84.25 47.63 15.93 1.18 0.00 0.00 1.05 27.30 79.30 91.16 348.62
SKEW 0.28 0.18 0.28 0.79 2.59 9.56 0.00 0.00 5.38 1.49 0.42 -0.10 -0.21
MAX 736.50 551.00 384.92 201.00 86.00 12.00 0.00 0.00 7.50 140.07 421.55 620.50 2325.41
MIN 131.50 66.50 45.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 37.00 116.00 839.00
NO YRS 111 112 113 111 110 108 112 112 112 112 107 110 99