SAN FRANCISCO INTL AP, CALIFORNIA

Monthly Total Heating Degree Days

(047769)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 139.50 114.00 150.50 191.50 350.50 597.00 1543.00
1949 701.50 508.00 391.00 333.50 277.50 175.50 185.00 146.00 94.00 247.00 225.00 535.00 3819.00
1950 622.50 426.50 422.50 312.50 295.00 190.50 115.50 98.00 80.00 137.50 163.00 354.50 3218.00
1951 506.50 419.00 417.00 385.50 222.00 187.00 197.50 115.00 108.00 160.50 327.00 511.00 3556.00
1952 555.50 398.50 437.50 302.00 260.50 217.50 90.50 154.00 87.00 196.50 391.00 453.00 3543.50
1953 370.00 419.50 437.00 376.50 295.00 196.50 151.50 94.50 57.50 207.50 292.00 431.50 3329.00
1954 481.50 391.00 474.50 251.00 258.00 191.50 116.50 126.50 109.00 212.50 345.50 538.00 3495.50
1955 624.00 457.00 388.50 388.00 242.50 188.00 178.00 170.00 136.00 181.00 332.00 412.00 3697.00
1956 469.00 492.00 414.00 322.00 217.00 138.50 113.50 92.00 62.00 207.50 303.50 505.50 3336.50
1957 589.00 339.00 350.00 248.00 201.00 82.50 49.50 80.50 26.00 118.00 326.50 477.00 2887.00
1958 454.00 268.00 400.50 220.50 94.50 19.00 27.00 2.50 11.00 79.00 233.50 305.00 2114.50
1959 359.50 330.00 221.00 164.00 188.50 116.50 54.00 43.00 35.00 62.50 254.00 428.00 2256.00
1960 491.00 392.00 315.00 277.50 210.00 74.50 87.00 97.00 102.50 146.50 337.00 504.00 3034.00
1961 539.00 331.50 365.00 237.50 247.00 96.00 81.50 39.50 68.00 168.50 355.00 550.00 3078.50
1962 548.00 418.50 450.00 273.50 257.50 173.50 151.50 64.00 127.00 169.50 279.00 476.50 3388.50
1963 603.00 255.50 408.00 361.50 253.50 191.00 102.00 60.00 18.50 94.50 318.50 582.00 3248.00
1964 523.50 411.50 408.00 325.50 285.50 129.00 82.50 51.00 98.00 143.50 401.50 427.00 3286.50
1965 513.50 409.50 394.00 318.00 303.00 201.50 147.00 74.00 122.00 108.00 295.00 624.00 3509.50
1966 541.50 454.50 416.00 220.50 240.00 129.00 144.00 95.00 62.50 151.50 309.50 496.50 3260.50
1967 491.00 382.50 391.00 423.50 214.50 171.00 91.00 71.50 14.00 79.50 224.00 526.00 3079.50
1968 574.50 304.00 325.50 303.00 271.50 122.00 114.00 48.00 59.50 177.50 318.50 534.50 3152.50
1969 556.50 451.50 398.50 330.50 175.00 119.00 92.00 75.50 58.50 119.50 268.50 350.00 2995.00
1970 390.50 285.00 271.50 339.50 172.00 138.50 97.50 125.00 62.00 211.00 272.50 505.50 2870.50
1971 519.50 421.00 400.50 361.50 267.00 159.00 139.00 26.00 52.50 258.50 355.50 586.50 3546.50
1972 600.50 376.50 301.50 290.00 234.00 138.00 69.50 46.50 81.00 139.50 354.50 623.50 3255.00
1973 529.00 339.50 422.50 248.00 203.50 109.00 108.50 136.00 82.00 135.50 333.50 466.00 3113.00
1974 510.00 430.00 361.00 308.00 279.50 150.50 87.50 60.50 106.00 122.50 337.50 508.50 3261.50
1975 547.00 396.00 423.00 433.50 224.50 159.00 114.00 81.50 127.00 194.50 384.50 487.50 3572.00
1976 511.00 421.00 434.00 352.50 228.50 142.50 81.50 43.00 85.50 136.00 240.50 502.50 3178.50
1977 558.50 331.00 439.00 286.00 286.00 148.50 109.50 55.00 60.50 144.50 291.50 394.00 3104.00
1978 389.00 343.00 248.00 303.00 166.00 140.50 119.00 70.50 35.00 151.50 377.50 589.00 2932.00
1979 544.00 412.50 327.50 285.50 154.50 140.50 60.00 60.50 15.00 92.00 328.50 439.00 2859.50
1980 449.50 306.50 373.00 275.00 271.00 163.00 82.50 116.00 82.00 153.00 283.50 443.00 2998.00
1981 433.00 308.00 365.50 282.00 187.00 58.00 118.50 71.00 76.50 203.00 260.00 396.00 2758.50
1982 618.00 372.00 425.00 312.50 248.50 163.00 109.50 68.50 52.00 134.00 382.00 499.50 3384.50
1983 529.00 326.00 337.00 309.00 231.50 119.50 37.00 2.50 18.50 47.50 286.00 362.00 2605.50
1984 425.50 351.50 248.50 275.50 130.00 121.50 47.50 41.50 7.50 152.50 336.00 536.50 2674.00
1985 577.50 376.50 424.00 188.00 199.50 29.50 52.50 57.00 65.00 166.00 391.00 554.50 3081.00
1986 350.50 244.50 245.50 268.00 197.50 85.50 85.00 119.50 68.50 127.00 236.50 455.00 2483.00
1987 485.50 327.50 315.00 177.00 135.00 92.50 66.50 20.50 46.50 75.50 241.50 451.50 2434.50
1988 448.00 303.50 264.50 218.50 189.00 84.00 43.00 33.00 77.50 134.50 255.00 453.00 2503.50
1989 518.50 464.00 313.50 168.00 165.50 102.50 75.50 47.00 108.50 145.50 257.00 463.50 2829.00
1990 468.50 443.50 364.00 196.50 189.50 102.00 37.00 15.00 9.50 81.50 270.00 576.50 2753.50
1991 462.50 273.50 397.00 279.00 253.00 174.00 62.50 49.00 74.00 100.50 228.50 440.50 2794.00
1992 500.00 259.00 234.50 139.00 59.50 62.50 23.00 55.50 37.00 43.00 246.00 473.00 2132.00
1993 488.50 350.50 234.00 208.50 105.00 60.00 38.00 14.00 76.00 73.50 261.00 462.00 2371.00
1994 418.50 403.00 281.00 246.00 207.50 122.50 95.50 46.50 50.00 159.50 454.00 528.00 3012.00
1995 396.00 307.50 344.00 299.50 249.50 151.50 53.00 85.50 78.00 106.00 198.00 352.50 2621.00
1996 408.50 293.50 280.00 194.50 156.50 134.50 80.00 80.00 78.00 162.50 263.50 343.00 2474.50
1997 437.50 324.50 278.50 204.50 82.00 80.50 37.00 10.00 2.50 113.50 226.50 431.00 2228.00
1998 378.00 355.50 310.50 278.00 226.00 113.50 88.50 65.00 62.00 151.50 325.00 559.00 2912.50
1999 488.50 410.50 435.50 321.50 296.00 176.00 113.50 56.00 83.00 101.27 a 238.00 431.42 a 3151.18
2000 390.50 334.00 332.50 213.50 174.50 100.00 115.00 62.00 35.50 157.50 373.50 416.50 2705.00
2001 503.00 393.50 290.00 343.50 112.00 101.00 84.00 66.50 79.50 106.50 232.50 414.00 2726.00
2002 496.00 328.00 347.00 248.50 221.50 126.50 52.50 63.50 63.50 146.50 226.50 386.50 2706.50
2003 346.50 360.50 284.50 321.50 198.00 114.00 78.00 18.50 30.00 94.50 335.00 404.00 2585.00
2004 457.00 371.00 185.50 194.00 148.50 106.00 29.00 9.00 30.00 157.00 293.00 397.50 2377.50
2005 476.00 281.00 245.00 246.50 110.50 96.00 39.50 64.50 92.50 121.50 234.00 371.00 2378.00
2006 416.50 339.50 432.50 283.50 172.50 75.50 55.50 64.50 90.50 146.00 284.50 455.00 2816.00
2007 526.50 354.50 283.00 269.50 212.50 122.00 43.50 49.50 54.00 164.00 278.50 481.50 2839.00
2008 514.50 386.00 351.00 292.50 233.00 144.50 95.50 55.50 58.00 84.00 221.00 500.00 2935.50
2009 424.50 362.00 349.00 282.00 188.50 76.00 98.50 39.50 34.00 111.00 255.50 490.00 2710.50
2010 426.50 308.00 308.50 284.50 230.50 107.00 72.00 83.50 16.00 63.00 306.50 399.50 2605.50
2011 449.50 403.50 352.50 286.00 255.50 149.50 81.50 93.00 53.50 90.00 336.00 487.50 3038.00
2012 448.00 370.50 364.50 247.00 206.50 122.50 84.50 109.00 133.50 87.50 203.00 393.18 a 2769.68
2013 507.50 394.50 319.82 a 5.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 20.00 z 1221.82
Period of Record Statistics
MEAN 490.42 366.19 350.29 280.23 210.43 127.69 88.78 68.42 66.40 137.00 294.53 469.66 2943.29
S.D. 74.36 59.35 68.48 62.32 56.53 42.77 39.20 37.05 34.93 46.74 58.65 72.74 400.87
SKEW 0.20 0.05 -0.34 0.06 -0.58 -0.16 0.57 0.51 0.19 0.25 0.26 0.07 -0.03
MAX 701.50 508.00 474.50 433.50 303.00 217.50 197.50 170.00 150.50 258.50 454.00 624.00 3819.00
MIN 346.50 244.50 185.50 139.00 59.50 19.00 23.00 2.50 2.50 43.00 163.00 305.00 2114.50
NO YRS 65 65 65 64 64 64 65 65 65 65 65 65 64