HALF MOON BAY, CALIFORNIA

Monthly Total Growing Degree Days

(043714)

Base Temperature = 40 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
1939 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 535.02 b 582.00 655.00 557.00 401.50 418.50 3149.02
1940 379.00 381.50 434.00 465.00 490.50 534.00 605.00 607.00 659.00 534.00 447.00 440.00 5976.00
1941 393.50 398.50 503.00 419.50 624.00 570.00 606.50 379.50 m 584.00 465.50 504.50 371.00 5440.00
1942 363.00 302.50 337.50 396.50 492.00 503.00 615.50 578.50 550.50 466.00 382.00 319.50 5306.50
1943 306.50 363.50 410.00 407.50 459.00 474.00 555.00 575.00 604.00 516.00 484.00 358.50 5513.00
1944 341.00 246.00 350.50 338.50 429.00 487.50 531.00 530.50 482.50 527.50 390.50 406.50 5061.00
1945 267.00 292.00 278.00 330.00 450.00 512.00 591.50 489.50 539.00 523.00 405.50 372.00 5049.50
1946 273.00 213.50 287.00 337.00 423.00 499.50 566.00 529.00 557.50 468.00 346.00 343.00 4842.50
1947 200.00 330.00 416.00 445.50 483.00 540.00 607.50 653.00 569.50 559.00 327.50 281.00 5412.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 544.50 576.00 497.00 549.00 378.00 196.50 2741.00
1949 113.00 183.50 368.00 345.50 463.50 522.50 501.50 578.50 278.00 n 398.02 c 0.00 z 0.00 z 3474.02
1950 0.00 z 272.16 c 322.50 238.00 i 376.00 460.00 511.50 545.94 d 546.00 530.00 579.00 434.00 4577.10
1951 290.50 292.00 297.50 318.50 462.00 429.00 477.50 503.00 578.50 499.00 410.50 289.00 4847.00
1952 229.00 307.00 297.00 342.00 408.50 432.50 568.50 586.00 619.00 534.00 398.00 351.00 5072.50
1953 427.50 175.00 o 0.00 z 272.50 f 453.50 488.50 488.00 584.00 637.50 508.00 378.00 298.00 4263.00
1954 227.00 357.50 258.00 368.00 432.50 475.00 521.50 524.50 533.00 512.50 441.00 328.50 4979.00
1955 210.00 242.00 330.00 269.50 387.00 456.50 471.50 464.50 447.00 467.00 343.45 a 288.50 f 4088.45
1956 337.26 b 236.00 345.50 374.50 474.96 c 523.39 b 563.00 505.50 598.97 a 529.00 490.86 a 361.50 5340.44
1957 239.50 361.00 388.61 c 435.50 523.68 c 550.50 584.41 d 576.08 a 616.61 b 603.98 a 433.50 404.50 5717.87
1958 387.50 d 300.00 g 367.19 b 448.50 545.00 651.50 616.50 625.34 b 660.50 524.00 423.00 461.50 5710.53
1959 389.00 313.00 446.18 c 455.89 b 494.50 531.00 607.00 646.50 597.00 609.15 a 364.50 g 412.62 b 5501.84
1960 301.00 339.00 425.50 418.50 475.50 561.00 554.50 537.00 531.00 517.50 434.50 415.00 5510.00
1961 435.00 348.50 367.00 414.50 482.00 575.50 595.00 679.00 612.50 567.00 366.50 283.50 5726.00
1962 354.00 281.50 306.00 405.50 424.50 443.50 479.50 577.50 517.24 a 530.50 424.00 342.50 5086.24
1963 249.60 b 407.00 310.50 363.50 449.50 456.00 e 565.50 545.00 432.50 h 603.50 462.00 362.50 4774.60
1964 291.00 358.50 318.00 330.00 366.00 480.00 560.50 460.00 g 555.50 561.00 394.00 353.00 4567.50
1965 353.00 261.00 358.50 403.00 425.50 443.28 a 495.00 631.00 558.50 633.00 481.50 249.50 5292.78
1966 320.00 251.50 321.00 427.00 358.50 465.50 486.00 550.50 589.50 589.00 456.00 334.00 5148.50
1967 369.42 a 369.00 332.50 281.00 409.00 454.00 577.00 574.50 647.50 630.00 524.00 318.00 5485.92
1968 368.00 413.50 430.50 385.50 448.00 484.00 550.00 628.50 576.50 500.00 397.50 297.50 5479.50
1969 233.00 210.00 347.50 303.00 413.00 471.00 460.00 451.50 521.00 488.00 506.00 434.00 4838.00
1970 437.00 368.00 393.00 342.00 479.00 432.50 477.50 469.00 550.00 504.50 485.00 300.00 5237.50
1971 343.50 302.00 341.00 310.00 362.00 420.50 423.00 567.50 566.00 396.50 378.00 208.00 4618.00
1972 229.00 334.00 395.77 a 353.00 387.50 454.50 549.00 625.00 609.00 621.50 431.50 272.80 a 5262.57
1973 294.00 388.00 0.00 z 411.50 443.50 519.00 542.50 536.00 572.00 535.00 377.50 353.00 4972.00
1974 275.00 280.50 382.50 373.50 399.50 487.50 584.00 610.00 580.50 568.00 426.50 312.00 5279.50
1975 308.89 c 297.00 320.00 270.50 420.50 437.50 506.50 525.50 507.00 453.50 358.00 325.50 e 4730.39
1976 338.00 299.67 b 295.03 b 307.50 447.00 499.00 558.50 672.00 603.50 571.90 b 496.00 392.00 5480.10
1977 349.00 363.50 311.00 321.00 422.00 485.50 540.50 648.42 a 588.00 e 500.00 378.21 b 430.50 5337.63
1978 441.50 369.00 517.00 418.50 478.50 515.50 555.00 591.50 590.00 498.00 327.00 236.78 b 5538.28
1979 289.50 272.00 393.00 368.00 451.00 460.50 568.50 598.50 648.10 a 611.50 425.00 423.00 5508.60
1980 365.50 443.50 384.50 391.50 443.00 512.50 605.00 572.50 550.50 489.50 422.31 d 449.00 5629.31
1981 414.50 388.00 407.00 388.00 444.00 538.00 529.50 581.50 552.00 477.00 509.50 401.45 a 5630.45
1982 274.00 342.00 363.50 413.00 437.50 544.50 572.00 587.00 582.00 562.00 431.00 375.50 5484.00
1983 396.00 387.00 440.00 419.00 489.80 a 538.39 b 617.00 712.50 719.42 d 657.50 435.00 379.20 c 6190.81
1984 377.00 323.66 a 405.50 354.50 447.90 b 459.50 622.00 621.00 628.50 491.72 b 388.00 305.00 5424.28
1985 306.90 a 311.63 a 298.00 392.59 a 456.73 a 533.00 582.50 608.50 580.50 536.50 0.00 z 363.50 4970.35
1986 450.00 415.50 468.50 371.50 405.50 572.50 600.00 613.00 565.50 529.50 444.00 362.00 5797.50
1987 298.50 357.50 362.00 406.00 500.50 248.50 o 0.00 z 632.00 567.50 588.50 462.00 309.50 4484.00
1988 339.00 372.00 340.00 398.00 238.50 m 495.50 219.00 s 0.00 z 509.00 514.00 395.50 307.00 3670.00
1989 253.50 184.00 375.50 476.00 455.00 525.00 548.00 589.00 561.00 509.00 437.00 f 416.50 4892.50
1990 343.67 b 242.15 a 360.00 431.00 469.00 494.50 590.50 649.00 602.00 445.00 355.50 200.50 5182.82
1991 244.00 307.00 238.00 280.50 296.50 386.50 530.00 601.50 532.50 515.50 413.50 338.86 b 4684.36
1992 340.50 453.00 494.50 506.00 537.50 571.50 663.50 559.60 b 559.00 602.00 433.45 a 305.00 6025.55
1993 303.00 327.00 444.00 334.00 482.50 498.00 500.00 622.00 0.00 z 544.50 306.50 i 320.50 4375.50
1994 251.50 j 296.00 411.00 393.50 329.00 i 459.00 532.00 570.50 606.00 522.00 293.00 262.50 4345.50
1995 392.00 415.00 418.50 397.50 465.00 471.00 641.00 590.50 593.50 582.50 431.00 400.00 5797.50
1996 385.50 404.50 412.50 430.50 461.50 439.00 542.50 551.00 515.50 497.50 423.00 428.50 5491.50
1997 364.00 318.00 348.50 390.00 568.50 516.50 595.00 702.50 697.50 570.50 547.50 403.50 6022.00
1998 411.00 334.50 398.00 404.00 482.50 534.50 554.50 586.00 572.50 491.50 369.00 268.50 5406.50
1999 338.50 249.50 275.50 348.50 342.50 434.50 530.00 606.00 558.00 516.50 433.00 343.00 4975.50
2000 366.50 372.50 362.00 421.00 472.50 553.50 567.50 583.00 625.00 535.00 365.50 440.50 5664.50
2001 318.00 312.50 393.00 313.50 128.00 w 261.50 n 565.50 582.50 536.50 559.50 0.00 z 0.00 z 3581.00
2002 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 570.50 608.50 361.00 h 318.50 i 223.00 m 217.50 m 1179.00
2003 519.50 181.50 m 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 643.80 e 530.50 398.50 382.00 2474.30
2004 333.50 294.00 445.00 435.00 509.50 517.50 648.00 677.50 509.50 516.50 413.50 355.00 5654.50
2005 336.00 382.00 471.50 384.00 551.00 517.00 599.50 575.50 519.50 447.00 464.50 406.50 5654.00
2006 332.50 301.00 275.50 418.00 480.00 560.50 588.50 615.00 494.00 522.00 393.00 339.00 5319.00
2007 190.00 311.50 321.00 333.50 461.50 482.50 622.50 621.50 554.00 474.00 390.00 238.50 5000.50
2008 257.50 261.50 287.50 296.00 435.00 450.50 579.00 601.50 512.00 499.50 470.50 269.50 4920.00
2009 412.50 308.50 333.00 362.50 441.50 577.00 592.50 645.50 561.00 518.50 365.00 287.00 5404.50
2010 393.50 353.50 365.00 366.50 409.50 515.00 577.50 594.50 537.00 510.50 359.50 368.00 5350.00
2011 374.07 a 259.78 a 375.00 385.00 458.50 499.00 572.50 568.50 544.14 a 589.00 349.50 251.00 5225.98
2012 344.00 286.50 321.88 a 407.50 427.50 477.41 a 571.50 556.00 480.50 561.88 c 504.44 c 321.37 a 5260.48
2013 334.00 228.31 b 334.00 15.50 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 896.31
Period of Record Statistics
MEAN 329.45 320.98 365.67 378.71 451.43 497.94 559.25 586.62 571.78 529.67 420.19 344.12 5356.08
S.D. 71.59 61.33 60.64 51.49 53.31 47.62 47.48 52.23 51.84 51.75 56.07 64.41 353.71
SKEW -0.28 -0.12 0.33 -0.16 0.16 0.37 -0.44 -0.19 0.34 0.04 0.42 -0.28 0.06
MAX 519.50 453.00 517.00 506.00 624.00 651.50 663.50 712.50 719.42 657.50 579.00 461.50 6190.81
MIN 113.00 183.50 238.00 269.50 296.50 386.50 423.00 451.50 447.00 396.50 293.00 196.50 4618.00
NO YRS 70 69 69 68 67 68 71 70 70 73 67 70 53