MODESTO, CALIFORNIA

Monthly Total Heating Degree Days

(045738)

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
1931 598.50 369.00 291.00 93.00 6.00 0.00 0.00 0.00 31.50 159.00 479.00 647.50 2674.50
1932 699.50 512.00 284.50 242.50 75.50 9.50 0.00 0.50 0.00 133.00 269.00 752.50 2978.50
1933 739.00 528.00 320.00 212.00 197.50 24.50 0.00 0.00 5.50 37.00 360.00 644.00 3067.50
1934 632.00 362.00 157.50 76.00 31.50 22.00 0.00 0.00 32.50 95.00 306.00 572.50 2287.00
1935 579.00 443.50 482.00 198.50 75.00 0.00 0.50 0.00 2.00 158.50 469.00 580.00 2988.00
1936 545.00 445.00 312.00 161.00 36.50 9.00 0.00 0.00 9.50 78.00 385.00 672.50 2653.50
1937 815.50 479.00 320.50 235.00 51.00 3.50 0.00 0.00 4.50 55.50 313.50 535.50 2813.50
1938 637.50 420.50 419.50 225.00 47.50 0.00 0.00 0.00 1.50 125.50 439.00 555.00 2871.00
1939 601.50 512.00 367.00 84.00 57.00 12.50 0.00 0.00 11.50 96.50 333.00 499.50 2574.50
1940 507.50 365.00 261.50 144.50 23.50 0.00 0.00 0.00 2.00 99.00 409.50 466.00 2278.50
1941 479.00 331.00 263.50 215.00 43.00 6.50 0.00 1.00 13.00 154.00 324.50 514.50 2345.00
1942 570.50 453.50 370.00 243.00 140.00 9.00 0.00 0.00 2.00 97.50 391.00 600.50 2877.00
1943 620.00 397.50 333.00 180.50 55.00 37.50 0.00 1.00 1.50 142.50 349.00 550.50 2668.00
1944 573.50 485.00 341.50 280.00 73.00 38.00 0.00 0.00 9.00 54.00 424.00 576.00 2854.00
1945 651.50 416.50 461.50 199.50 98.50 9.00 0.00 0.00 19.00 76.50 429.00 591.00 2952.00
1946 662.50 511.00 362.00 140.00 42.50 2.50 0.00 1.50 3.00 182.50 475.50 621.00 3004.00
1947 772.50 443.50 274.00 124.00 18.00 3.00 0.00 2.50 10.00 108.50 500.00 668.50 2924.50
1948 585.00 551.50 476.50 284.00 142.60 a 11.00 2.00 0.00 42.50 144.50 471.00 741.00 3451.60
1949 890.50 583.50 419.50 132.50 94.00 4.50 1.00 4.50 20.00 218.50 364.80 e 771.56 d 3504.86
1950 727.00 438.50 396.50 137.00 90.50 24.50 0.00 0.00 9.00 78.00 223.50 451.50 2576.00
1951 576.50 420.00 350.00 178.50 71.50 11.00 2.00 0.50 2.50 107.50 330.00 614.50 2664.50
1952 611.50 460.50 129.50 r 189.50 45.50 24.00 0.00 0.00 12.50 63.50 438.00 552.50 2397.50
1953 446.50 417.50 369.50 205.00 140.00 39.00 0.00 2.00 0.00 127.00 325.00 563.50 2635.00
1954 568.00 446.00 434.00 a 111.50 25.00 27.50 0.00 3.50 10.00 118.00 416.00 646.50 2806.00
1955 714.50 517.50 345.00 314.50 94.00 9.50 1.00 0.00 15.50 82.00 423.00 479.50 2996.00
1956 512.50 539.50 334.00 200.00 50.00 8.00 0.00 0.00 0.50 159.50 381.50 610.00 2795.50
1957 684.00 336.00 297.50 158.00 61.00 0.50 0.00 1.50 2.50 121.50 414.00 611.00 2687.50
1958 568.00 288.50 411.00 165.00 22.00 2.00 0.00 0.00 2.00 32.50 286.50 444.00 2221.50
1959 447.50 407.00 188.00 42.00 67.50 0.00 0.00 2.00 11.00 53.00 340.00 581.50 2139.50
1960 572.00 431.00 265.00 180.50 80.00 0.00 0.00 0.00 0.50 87.83 a 396.00 636.50 2649.33
1961 707.50 341.50 346.50 148.00 100.50 5.00 0.00 0.00 9.00 128.50 417.00 656.50 2860.00
1962 740.00 492.00 409.00 105.50 97.00 3.50 0.00 0.00 0.50 104.00 277.50 580.50 2809.50
1963 707.00 211.00 354.00 289.00 59.50 1.50 0.00 0.00 0.50 78.00 419.50 772.50 2892.50
1964 611.00 435.00 364.50 198.00 104.00 32.00 1.50 8.00 18.00 63.00 467.50 487.00 2789.50
1965 603.00 445.00 347.50 237.00 94.00 43.00 0.00 0.00 21.50 41.50 313.00 727.50 2873.00
1966 610.50 472.50 300.00 79.50 24.50 21.50 0.00 1.00 10.00 108.00 328.00 635.50 2591.00
1967 626.00 482.50 386.00 442.50 90.50 39.00 0.00 0.00 0.50 33.00 270.00 662.00 3032.00
1968 654.00 277.50 270.50 166.00 72.50 1.03 a 0.00 0.50 3.50 99.00 351.50 631.00 2527.03
1969 609.50 463.50 348.50 174.50 29.50 2.50 0.00 0.00 0.00 149.50 323.50 503.50 2604.50
1970 466.50 328.50 284.50 251.00 46.50 6.00 0.00 0.00 5.50 134.00 303.00 563.50 2389.00
1971 606.50 475.48 a 358.00 222.50 108.00 18.50 0.00 0.00 28.50 195.50 382.50 669.60 a 3065.08
1972 742.00 365.50 150.00 160.50 52.50 5.00 0.00 0.50 1.50 115.50 437.00 722.00 2752.00
1973 606.00 346.00 429.50 127.50 26.50 4.50 0.00 0.50 1.50 104.00 369.00 547.50 2562.50
1974 548.00 429.00 289.50 188.00 64.50 0.00 0.50 0.00 0.00 51.00 373.00 595.00 2538.50
1975 665.00 386.50 390.50 306.00 61.50 6.00 0.00 0.50 0.00 149.00 414.50 594.00 2973.50
1976 574.00 409.00 356.50 222.00 18.00 17.50 0.00 0.50 0.00 54.50 301.00 593.00 2546.00
1977 676.50 344.00 389.00 65.50 140.50 0.50 0.00 0.00 4.00 50.00 303.00 444.00 2417.00
1978 446.00 345.00 137.00 186.50 23.00 0.00 0.00 0.00 5.50 44.50 436.50 729.00 2353.00
1979 585.50 418.00 254.50 119.00 32.50 1.00 0.00 0.00 0.00 72.50 355.50 518.50 2357.00
1980 486.50 315.50 339.00 152.50 91.00 15.00 1.00 0.00 4.50 105.50 309.50 584.50 2404.50
1981 487.50 341.70 a 317.50 139.00 31.50 0.00 0.00 0.00 0.00 129.00 271.00 476.50 2193.70
1982 671.00 353.50 363.50 174.00 23.50 19.50 0.00 0.00 9.50 72.00 440.00 585.50 2712.00
1983 633.00 324.00 267.50 220.00 65.50 0.50 0.00 0.00 2.50 8.00 349.00 434.00 2304.00
1984 567.50 401.50 180.00 169.50 26.00 2.00 0.00 0.00 0.00 142.00 376.00 640.67 a 2505.17
1985 694.00 359.50 366.00 59.50 31.50 8.50 0.00 0.00 11.50 108.50 429.00 738.50 2806.50
1986 418.50 267.00 158.50 118.50 48.50 0.00 0.00 0.00 z 45.50 57.50 303.50 609.00 2026.50
1987 631.50 365.00 302.00 54.00 28.00 0.00 1.00 0.00 0.00 31.50 414.00 573.50 2400.50
1988 560.50 323.00 209.00 133.50 82.00 23.50 0.00 0.00 2.50 36.50 0.00 z 621.00 1991.50
1989 658.23 a 441.00 215.50 71.00 30.00 0.50 0.00 0.00 7.50 90.00 279.50 646.00 2439.23
1990 515.00 444.00 236.50 60.50 45.50 3.50 0.00 0.00 0.00 19.00 300.50 672.00 2296.50
1991 515.00 250.50 382.50 187.00 101.00 10.00 0.00 0.00 0.50 77.00 236.00 537.00 2296.50
1992 658.50 250.00 191.50 49.50 0.00 6.50 0.00 0.00 0.00 17.50 253.00 593.00 2019.50
1993 556.50 365.00 149.00 131.00 19.00 15.00 0.00 0.00 3.50 14.50 309.00 585.50 2148.00
1994 531.00 397.50 170.50 109.50 46.50 0.50 0.00 0.00 0.00 45.00 445.00 608.50 2354.00
1995 371.50 292.00 276.00 149.00 69.50 19.50 0.00 0.00 z 0.00 17.50 114.00 402.00 1711.00
1996 485.50 266.50 200.50 104.50 8.50 1.00 0.00 0.00 0.00 109.50 249.00 427.00 1852.00
1997 478.00 284.50 145.00 78.50 4.00 0.00 0.00 0.00 0.00 66.00 224.00 538.50 1818.50
1998 452.00 361.50 231.50 188.50 121.50 1.50 0.00 0.00 3.50 118.50 370.00 668.00 2516.50
1999 654.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 31.50 275.50 586.50 1548.00
2000 489.00 357.50 298.00 101.00 54.50 2.00 0.00 0.00 0.50 127.50 486.50 574.00 2490.50
2001 624.00 449.50 233.00 251.00 0.00 0.00 0.00 0.00 0.00 39.00 287.00 527.50 2411.00
2002 646.50 394.50 340.50 146.00 47.00 0.00 0.00 0.00 2.50 98.00 331.50 501.00 2507.50
2003 487.00 418.00 265.00 271.00 68.50 0.00 0.00 0.00 0.00 31.00 414.00 499.50 2454.00
2004 590.50 424.00 142.00 96.50 16.00 1.50 0.00 0.00 17.00 139.00 413.00 572.50 2412.00
2005 591.00 335.00 253.00 193.00 43.50 7.50 0.00 0.00 0.50 48.00 279.00 456.00 2206.50
2006 515.50 313.00 386.50 149.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1364.00
Period of Record Statistics
MEAN 596.60 398.31 306.66 167.96 59.49 9.38 0.14 0.44 6.77 90.66 357.65 587.20 2605.99
S.D. 95.79 78.89 86.81 72.63 38.79 11.46 0.43 1.22 9.81 46.97 75.95 85.48 325.97
SKEW 0.25 -0.05 -0.25 0.74 0.94 1.39 3.17 4.22 2.14 0.30 -0.34 0.07 0.14
MAX 890.50 583.50 482.00 442.50 197.50 43.00 2.00 8.00 45.50 218.50 500.00 772.50 3504.86
MIN 371.50 211.00 137.00 42.00 0.00 0.00 0.00 0.00 0.00 8.00 114.00 402.00 1818.50
NO YRS 76 75 74 75 74 74 74 72 75 75 74 75 70