TUCSON WFO, ARIZONA

Monthly Total Cooling 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 435.00 208.22 a 35.00 0.00 678.22
1895 0.00 0.00 33.50 66.92 d 302.50 484.00 656.68 a 551.50 474.00 142.00 0.00 0.00 2711.11
1896 0.00 z 2.00 r 48.50 51.00 270.00 486.00 f 620.50 589.50 469.50 154.00 1.50 0.00 b 2204.50
1897 0.00 0.00 0.50 71.00 330.00 452.50 645.12 b 586.23 c 448.27 d 157.50 22.00 0.00 2713.12
1898 0.00 0.50 0.00 a 119.00 53.00 r 401.50 h 660.00 613.00 429.00 134.00 16.50 0.00 1972.00
1899 0.00 0.00 3.50 74.00 137.50 489.00 668.00 575.50 522.50 143.50 2.00 0.00 2615.50
1900 0.00 0.00 36.50 19.50 302.50 528.00 722.00 549.00 349.50 145.00 15.50 0.00 2667.50
1901 0.00 0.00 3.00 59.00 230.00 432.00 690.00 614.50 438.50 159.00 10.50 0.00 2636.50
1902 0.00 0.00 0.00 77.00 221.00 544.00 607.08 a 593.00 444.50 187.50 2.50 0.00 2676.58
1903 0.00 0.00 2.00 32.00 162.00 462.00 643.50 645.00 400.50 99.00 3.00 0.00 c 2449.00
1904 0.00 4.00 12.50 49.00 253.00 506.50 617.00 541.00 363.50 156.00 2.50 0.00 2505.00
1905 0.00 0.00 a 0.00 1.00 73.50 381.50 595.50 653.50 465.00 167.50 3.50 0.00 2341.00
1906 0.00 4.50 6.50 42.00 162.50 451.00 656.00 523.00 423.00 177.00 25.00 2.00 2472.50
1907 0.00 0.00 19.50 66.00 192.50 390.00 646.50 557.50 449.00 156.00 8.00 0.00 2485.00
1908 0.00 0.00 11.50 39.50 133.00 426.50 584.50 539.00 395.00 98.00 12.00 0.00 2239.00
1909 0.00 0.00 0.00 35.00 128.50 491.50 619.00 552.50 384.50 110.50 18.50 0.00 2340.00
1910 0.00 0.00 46.00 108.50 319.00 536.00 647.50 630.50 512.00 201.00 1.50 0.00 3002.00
1911 0.00 2.00 16.00 35.50 240.00 491.50 576.00 622.00 485.50 112.00 0.00 a 1.50 2582.00
1912 0.00 0.00 0.00 11.50 205.50 539.50 515.12 a 548.00 354.50 87.50 2.00 0.00 2263.62
1913 0.00 0.00 1.50 46.50 211.00 396.00 574.00 574.00 399.00 75.50 12.00 0.00 2289.50
1914 0.00 0.00 11.00 61.00 287.00 517.00 561.50 596.50 451.00 86.50 9.00 0.00 a 2580.50
1915 0.00 0.00 0.00 19.50 141.50 342.50 h 690.50 676.12 b 404.00 0.00 z 0.00 z 0.00 z 1931.62
1916 0.00 6.73 a 44.00 76.50 175.50 454.50 601.00 553.00 427.24 a 83.00 5.00 0.00 2426.47
1917 0.00 0.00 6.00 31.50 79.50 516.50 633.43 a 562.00 456.72 a 202.00 9.50 0.00 2497.16
1918 0.00 a 1.50 22.50 56.00 158.00 613.00 658.50 520.50 491.90 a 202.50 25.00 0.00 2749.40
1919 0.00 0.00 3.00 79.50 234.00 523.00 561.00 561.50 356.00 38.00 3.50 0.00 2359.50
1920 0.00 0.00 0.00 4.50 213.00 444.50 694.50 545.50 359.48 a 81.52 d 0.00 0.00 2343.00
1921 0.00 5.00 9.00 33.00 148.50 436.00 591.00 519.50 410.50 220.00 6.00 0.50 2379.00
1922 0.00 0.00 0.00 46.50 279.50 541.50 640.50 595.50 468.00 184.00 0.00 0.00 2755.50
1923 0.00 1.00 0.00 37.50 290.00 402.50 606.00 490.00 352.00 66.00 0.00 0.00 2245.00
1924 0.00 0.00 0.00 a 17.00 274.00 583.00 670.50 654.00 503.00 95.50 33.00 0.00 2830.00
1925 0.00 0.00 28.50 96.00 307.50 459.83 a 722.19 d 579.00 398.50 134.50 3.10 a 0.00 2729.12
1926 0.00 2.00 9.00 71.00 225.50 524.00 635.50 a 649.00 476.50 197.00 3.50 0.00 2793.00
1927 0.00 0.00 0.00 99.00 275.00 459.00 682.00 586.50 422.14 b 143.50 7.50 0.00 a 2674.64
1928 0.00 0.00 7.50 47.50 329.00 501.11 c 698.53 a 573.50 483.00 196.00 14.50 0.00 2850.64
1929 0.00 2.00 4.00 25.00 256.00 497.00 659.50 595.00 441.00 226.00 5.50 0.00 2711.00
1930 0.00 0.00 0.00 125.00 206.00 526.55 a 648.50 630.00 397.00 90.50 29.50 0.00 a 2653.05
1931 0.00 0.50 4.50 81.50 261.00 495.00 730.00 535.50 465.00 149.50 24.00 0.00 2746.50
1932 0.00 0.00 1.00 55.34 a 224.00 440.50 635.00 624.13 a 469.50 141.50 6.00 0.00 2596.98
1933 0.00 0.00 0.50 10.00 120.90 a 517.76 a 695.50 644.50 497.50 215.50 12.00 0.00 2714.16
1934 0.00 0.00 33.50 162.00 417.50 442.00 707.00 578.50 433.97 a 194.78 a 30.00 0.00 c 2999.25
1935 0.00 0.00 0.00 54.00 121.00 510.50 642.50 537.00 399.50 177.00 0.00 0.00 2441.50
1936 0.00 0.00 9.00 140.50 326.00 566.50 674.50 583.00 384.00 143.52 d 19.14 a 0.00 2846.16
1937 0.00 0.00 2.50 49.00 276.00 486.50 660.50 650.00 506.00 186.50 12.22 c 0.00 2829.22
1938 0.00 0.00 5.00 96.72 a 218.50 506.00 602.50 567.50 487.00 174.50 0.00 z 0.00 2657.72
1939 0.00 0.00 26.00 103.50 276.93 a 529.00 688.00 605.50 435.52 a 97.50 33.00 9.00 2803.95
1940 2.50 0.00 10.50 74.00 227.00 h 529.00 666.00 586.00 441.21 a 205.67 e 0.00 4.00 2518.88
1941 0.00 1.50 0.00 26.00 265.50 447.50 645.00 562.50 412.00 115.50 20.00 0.00 2495.50
1942 2.00 0.00 1.00 37.00 237.50 487.50 733.50 599.50 437.50 122.50 3.50 0.00 2661.50
1943 0.00 1.00 11.50 138.00 270.45 b 484.50 659.50 551.50 441.50 194.00 2.50 0.00 f 2754.45
1944 0.00 0.00 5.00 41.50 258.50 464.00 700.00 699.00 442.50 206.00 3.00 0.00 2819.50
1945 0.00 f 0.00 4.00 101.00 277.50 407.00 680.50 616.50 439.00 138.50 1.50 0.00 2665.50
1946 0.00 0.00 33.50 193.50 233.00 562.50 636.00 574.00 467.00 37.50 0.00 0.00 2737.00
1947 0.00 0.00 5.50 59.00 345.00 497.00 718.00 603.50 527.50 179.50 8.00 f 0.00 2935.00
1948 0.00 0.00 0.00 129.00 310.00 546.50 730.50 687.50 578.00 275.50 2.50 0.50 3260.00
1949 0.00 0.00 3.50 148.00 284.50 563.00 664.50 638.00 564.50 136.00 44.50 2.50 3049.00
1950 0.00 3.50 16.00 153.00 243.00 494.50 585.00 633.50 388.50 357.50 15.00 0.00 2889.50
1951 1.00 3.50 8.00 90.50 306.50 466.50 768.50 636.00 539.00 237.00 2.00 0.00 3058.50
1952 1.50 1.00 10.50 83.50 370.50 564.50 682.00 680.50 567.00 328.50 21.50 0.00 3311.00
1953 0.00 0.00 31.00 82.50 175.50 570.00 713.50 706.00 526.50 215.50 54.50 0.00 3075.00
1954 0.00 5.00 5.50 182.50 357.02 a 509.00 663.00 564.50 501.00 240.00 14.50 2.00 3044.02
1955 0.00 0.00 12.00 51.00 205.50 484.50 582.50 527.50 475.00 267.00 7.50 0.00 2612.50
1956 2.00 0.00 19.50 76.00 347.50 639.50 644.50 605.00 576.00 216.50 15.00 0.00 3141.50
1957 0.50 18.50 11.50 82.50 215.00 624.50 724.00 634.50 500.00 158.50 0.50 0.00 2970.00
1958 0.00 0.00 0.00 98.50 455.00 603.00 711.00 650.50 458.00 254.50 6.50 0.00 3237.00
1959 0.00 0.00 6.50 181.00 290.00 656.50 710.50 545.00 465.52 a 219.50 3.00 2.00 3079.52
1960 0.00 0.00 41.00 141.00 315.50 647.50 732.00 686.00 542.31 d 160.50 32.00 0.00 3297.81
1961 0.00 0.00 20.00 126.50 295.50 607.00 672.00 611.50 421.50 188.00 0.00 0.00 2942.00
1962 0.00 6.50 4.50 168.10 a 250.00 487.00 666.50 691.00 528.50 182.00 26.38 a 0.50 3010.98
1963 0.00 13.50 11.88 a 51.50 359.00 430.50 726.95 a 563.50 538.45 a 230.84 c 16.00 0.00 2942.12
1964 0.00 0.00 9.96 c 63.00 265.50 502.76 a 697.50 a 575.50 405.00 232.50 0.00 0.00 a 2751.72
1965 2.07 a 1.04 a 8.78 a 125.50 186.52 a 383.00 704.00 655.50 405.54 b 245.93 a 0.00 z 0.00 z 2717.87
1966 0.00 0.00 20.00 97.00 357.50 559.50 700.00 631.50 443.00 129.00 5.00 1.50 2944.00
1967 0.00 1.04 a 27.38 a 17.59 a 243.50 485.00 658.75 a 621.50 494.00 230.00 33.50 0.00 2812.26
1968 0.00 9.50 25.50 75.00 307.00 606.67 c 697.50 b 569.00 468.50 228.50 18.50 0.00 3005.67
1969 0.00 0.00 22.00 130.50 385.90 b 523.50 747.00 765.50 581.50 174.50 18.75 b 0.00 3349.15
1970 0.00 7.50 0.00 31.00 388.00 596.50 723.50 682.50 416.50 91.50 15.50 0.00 2952.50
1971 13.50 7.00 65.00 81.00 214.00 555.50 754.50 538.50 460.50 134.00 28.00 1.00 2852.50
1972 0.00 12.00 138.00 143.00 333.00 563.50 765.00 629.00 480.00 220.00 0.50 0.00 3284.00
1973 0.00 2.50 0.00 66.00 384.00 558.50 703.50 723.50 573.50 299.00 64.00 3.50 3378.00
1974 0.00 2.50 50.00 110.50 376.50 707.00 656.50 628.50 473.50 265.00 1.00 h 0.00 b 3270.00
1975 3.00 0.00 19.08 e 58.85 d 278.50 554.50 651.00 736.50 522.50 223.00 37.00 2.50 3086.42
1976 1.50 1.50 26.00 131.00 358.00 615.00 655.50 729.00 455.50 184.50 43.00 0.00 3200.50
1977 0.00 0.00 6.00 167.00 249.50 653.50 774.50 748.50 577.50 297.50 33.00 0.00 3507.00
1978 0.00 0.00 93.00 110.00 328.50 672.00 781.50 694.50 556.50 341.00 41.00 0.00 3618.00
1979 0.00 0.00 8.00 143.50 304.50 609.50 744.50 635.00 629.50 307.50 14.50 3.50 3400.00
1980 0.00 8.00 7.00 137.00 266.00 664.50 797.50 683.00 570.00 291.50 79.00 12.50 3516.00
1981 4.50 15.00 20.00 255.00 336.00 649.50 665.50 734.00 564.50 197.00 42.00 4.50 3487.50
1982 0.00 8.50 13.00 169.00 357.50 585.00 652.50 654.50 516.00 164.50 7.00 0.00 3127.50
1983 1.00 0.00 15.00 45.00 316.50 545.00 734.00 657.50 568.50 211.00 29.50 0.00 3123.00
1984 0.00 0.00 32.00 109.50 499.00 577.00 620.50 609.50 553.50 126.00 12.50 0.00 3139.50
1985 0.00 3.00 22.50 196.00 394.00 670.00 734.00 696.50 434.50 239.50 27.00 0.00 3417.00
1986 8.00 30.50 113.00 172.50 421.50 685.00 633.00 635.50 449.50 183.50 16.00 0.00 3348.00
1987 7.50 6.50 16.00 209.50 332.50 652.00 768.50 664.00 480.50 344.50 24.00 1.00 3506.50
1988 3.00 15.50 67.50 155.00 389.50 675.50 744.00 689.50 518.00 370.00 70.00 4.00 3701.50
1989 0.00 24.50 132.50 326.00 449.50 656.50 791.00 690.00 604.50 238.50 19.50 0.00 3932.50
1990 0.00 8.50 62.50 180.00 352.50 736.50 621.50 553.00 526.00 269.50 64.50 0.00 3374.50
1991 0.00 4.00 12.00 109.50 326.50 553.50 731.50 699.00 532.00 362.00 24.00 0.00 3354.00
1992 0.00 0.00 8.00 285.00 427.00 663.50 732.50 683.00 622.00 345.50 6.00 0.00 3772.50
1993 0.00 0.00 65.50 213.00 507.50 687.00 788.00 704.50 571.00 304.50 44.00 2.50 3887.50
1994 0.00 4.50 46.50 186.50 396.00 824.00 879.00 860.50 668.00 302.50 24.50 0.00 4192.00
1995 0.00 21.00 63.00 115.50 338.50 599.00 807.50 750.50 607.50 312.50 51.00 0.00 3666.00
1996 0.00 11.00 58.50 217.00 534.00 748.50 790.50 694.00 420.50 283.00 37.00 1.00 3795.00
1997 0.00 1.00 132.00 0.00 z 588.50 698.50 859.50 809.00 0.00 z 239.00 0.00 z 0.00 z 3327.50
1998 0.00 0.00 b 17.00 60.50 276.50 521.50 679.50 669.00 535.50 212.50 5.00 0.00 2977.00
1999 1.00 0.50 25.83 a 64.44 c 334.00 580.00 588.00 628.50 522.50 282.50 106.11 c 1.11 c 3134.50
2000 1.66 c 3.00 10.50 228.50 499.32 c 607.50 736.00 628.50 594.50 165.50 0.00 0.00 3474.98
2001 0.00 0.00 50.50 169.00 476.50 647.50 673.00 671.00 616.00 271.50 89.50 1.00 3665.50
2002 0.00 3.00 31.00 235.00 377.00 700.00 696.00 666.00 551.00 183.00 13.00 0.00 3455.00
2003 0.00 1.50 34.00 112.50 426.00 646.00 772.00 685.50 561.00 352.00 15.50 4.00 3610.00
2004 0.00 2.50 168.50 124.50 438.00 630.50 697.00 648.00 502.00 204.50 17.50 1.50 3434.50
2005 0.00 0.00 18.50 137.50 414.00 0.00 z 792.50 610.50 575.00 265.50 0.00 z 0.00 2813.50
2006 1.00 4.50 20.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 42.50 0.00 68.00
2007 0.00 z 2.50 101.00 172.50 447.00 653.50 702.50 700.50 561.00 268.00 97.50 0.50 3706.50
2008 0.00 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
Period of Record Statistics
MEAN 0.52 2.74 23.20 100.30 295.85 548.80 682.60 625.56 481.82 196.94 19.56 0.64 2973.85
S.D. 1.76 5.34 31.97 64.39 100.04 89.73 64.55 66.76 70.30 75.28 21.60 1.74 435.64
SKEW 5.10 2.86 2.40 0.89 0.28 0.39 0.28 0.58 0.26 0.27 1.83 4.36 0.41
MAX 13.50 30.50 168.50 326.00 588.50 824.00 879.00 860.50 668.00 370.00 106.11 12.50 4192.00
MIN 0.00 0.00 0.00 1.00 73.50 381.50 515.12 490.00 349.50 37.50 0.00 0.00 2239.00
NO YRS 111 112 113 111 110 108 112 112 112 112 107 110 99