SEATTLE SAND PT WSFO, WASHINGTON

Monthly Total Growing Degree Days

(457470)

Base Temperature = 50 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200601
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
1986 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 174.00 10.00 0.00 a 184.00
1987 3.50 9.50 21.00 103.00 229.50 378.00 453.00 508.00 398.50 211.50 53.00 0.00 2368.50
1988 0.00 2.50 6.50 68.50 196.00 304.50 473.50 489.50 340.00 213.00 19.50 4.00 2117.50
1989 0.00 0.00 z 0.00 z 117.00 186.50 371.00 444.00 467.00 385.50 142.00 22.00 8.00 2143.00
1990 0.00 3.50 17.50 76.00 165.00 313.50 0.00 z 574.00 416.50 62.00 29.00 0.00 1657.00
1991 1.00 9.00 2.50 0.00 z 128.00 250.00 492.00 515.50 373.00 153.00 19.50 0.00 1943.50
1992 8.50 15.50 24.00 117.00 270.50 434.50 487.00 516.50 285.50 132.50 5.00 0.00 2296.50
1993 0.00 6.00 10.00 45.00 361.50 364.50 402.50 506.50 394.50 214.00 3.62 a 6.00 2314.12
1994 0.50 3.00 32.50 78.00 231.50 310.00 531.00 542.50 436.50 92.00 0.00 0.00 2257.50
1995 5.50 6.50 24.50 59.00 314.50 373.00 524.50 395.00 408.50 123.00 41.00 5.00 2280.00
1996 3.00 1.00 16.50 76.00 103.00 290.50 526.50 507.50 274.00 105.00 0.00 z 0.00 1903.00
1997 0.50 1.00 4.00 40.50 276.00 313.00 468.00 581.50 407.00 0.00 z 38.50 0.00 2130.00
1998 5.50 3.50 31.50 67.00 174.00 322.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2.50 606.50
1999 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 485.50 332.00 97.50 22.50 1.00 938.50
2000 0.00 0.00 1.50 70.00 137.00 338.00 468.00 450.50 339.50 114.00 2.00 0.00 1920.50
2001 0.00 0.00 7.00 52.00 170.00 263.00 430.00 496.00 328.50 81.12 a 22.24 a 0.00 1849.86
2002 4.50 0.00 1.00 25.50 137.50 353.50 468.00 497.00 336.00 102.00 33.50 2.00 1960.50
2003 8.50 0.00 25.00 39.50 173.50 383.00 563.00 529.50 393.00 190.50 1.00 0.00 2306.50
2004 0.00 a 0.00 29.00 108.50 241.50 400.50 577.00 583.50 303.50 149.00 8.50 2.50 2403.50
2005 19.00 1.50 33.50 95.00 282.00 319.00 500.50 538.00 0.00 z 155.50 1.00 4.00 1949.00
2006 0.00 0.00 z 0.00 z 44.50 198.50 378.33 c 330.00 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 621.33
Period of Record Statistics
MEAN 3.16 3.68 16.91 71.22 209.26 340.02 488.03 510.19 361.88 139.53 18.44 1.75 2188.63
S.D. 4.83 4.36 11.69 27.90 68.63 47.73 47.35 46.61 48.37 46.95 15.86 2.44 194.08
SKEW 2.03 1.35 -0.03 0.24 0.52 -0.05 0.22 -0.46 -0.30 0.23 0.56 1.19 -0.70
MAX 19.00 15.50 33.50 117.00 361.50 434.50 577.00 583.50 436.50 214.00 53.00 8.00 2403.50
MIN 0.00 0.00 1.00 25.50 103.00 250.00 402.50 395.00 274.00 62.00 0.00 0.00 1849.86
NO YRS 19 17 17 18 19 19 16 18 17 18 18 20 11