PORTLAND WB CITY, OREGON

Monthly Total Growing Degree Days

(356749)

Base Temperature = 50 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
1973 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 453.50 428.50 133.50 6.50 2.50 1024.50
1974 7.00 0.00 29.00 70.00 172.50 436.50 541.00 570.50 570.50 209.00 27.50 7.00 2640.50
1975 7.50 6.00 4.50 28.00 259.50 340.50 568.00 440.00 515.50 136.00 34.00 13.50 2353.00
1976 5.50 3.50 14.00 92.00 246.50 327.00 540.50 486.50 447.00 196.50 72.00 0.00 2431.00
1977 1.50 25.00 1.50 168.50 131.50 451.50 501.00 679.50 350.50 181.50 18.00 0.00 z 2510.00
1978 1.50 21.50 115.50 77.68 b 214.00 518.50 611.50 563.17 a 352.00 251.50 12.50 0.00 2739.35
1979 0.00 0.50 85.00 115.00 307.50 447.00 635.00 0.00 z 0.00 z 0.00 z 18.50 5.74 d 1614.24
1980 0.00 7.50 10.50 169.50 238.50 303.00 579.00 498.00 417.50 212.00 51.00 31.00 2517.50
1981 4.00 19.50 36.00 131.00 240.50 358.50 547.00 686.00 422.50 115.50 28.00 0.00 2588.50
1982 0.00 18.50 18.50 61.50 247.00 450.00 490.00 563.00 390.50 154.50 6.50 3.50 2403.50
1983 4.50 12.00 44.00 126.50 339.50 340.00 485.50 567.50 350.50 150.00 31.50 0.00 2451.50
1984 12.50 2.00 48.00 44.00 179.00 318.50 552.00 548.50 376.50 125.50 8.00 0.00 2214.50
1985 0.00 0.00 z 6.00 140.50 233.00 395.50 680.00 536.00 304.00 128.50 0.00 z 0.00 2423.50
1986 6.50 44.00 91.00 64.50 232.50 a 489.50 443.50 680.50 321.00 233.50 26.00 0.00 2632.50
1987 0.00 7.50 43.00 166.00 322.00 479.50 497.00 627.00 481.50 303.00 53.50 2.50 2982.50
1988 0.50 27.50 19.50 112.50 203.50 368.00 568.50 554.50 430.00 280.50 23.50 2.50 2591.00
1989 0.50 0.00 8.00 214.50 247.00 442.50 458.00 482.00 476.00 171.00 32.00 7.00 2538.50
1990 5.00 13.00 70.00 151.50 0.00 z 390.50 636.00 624.00 514.00 105.50 35.50 0.50 2545.50
1991 9.50 40.00 15.00 71.50 134.50 282.50 0.00 z 586.00 532.00 246.00 31.50 1.00 1949.50
1992 23.50 38.00 122.00 192.50 433.00 509.50 641.00 639.00 400.00 224.00 18.00 0.00 3240.50
1993 5.00 0.50 25.50 70.50 350.00 359.50 408.00 563.00 475.00 243.00 0.00 12.50 2512.50
1994 2.50 5.00 90.00 129.50 304.00 346.50 609.00 571.00 503.00 139.50 0.00 15.00 2715.00
1995 12.50 46.50 46.00 74.50 321.00 398.00 605.00 500.50 501.50 150.00 97.00 5.00 2757.50
1996 2.00 23.00 25.50 131.00 156.50 389.00 658.00 612.00 339.50 169.00 16.00 4.00 2525.50
1997 4.00 3.00 30.50 78.50 396.50 378.00 563.00 658.00 470.00 125.50 53.50 0.50 2761.00
1998 1.00 8.00 71.00 125.00 189.50 391.50 631.50 628.50 511.00 164.50 23.00 9.50 2754.00
1999 0.00 0.00 20.00 81.21 a 159.81 b 318.75 b 514.00 570.83 b 455.00 182.50 61.50 44.95 a 2408.54
2000 0.00 0.00 13.00 152.50 228.00 451.73 d 559.07 b 534.00 406.50 163.00 7.24 a 0.00 2515.04
2001 0.52 a 0.00 38.00 71.50 303.00 317.50 492.50 583.50 449.00 156.50 36.72 a 1.50 2450.24
2002 7.50 17.00 4.00 99.50 185.50 424.50 615.50 586.50 455.50 173.00 28.50 5.00 2602.00
2003 22.00 2.00 39.50 65.50 248.50 487.00 650.50 606.50 502.00 243.19 b 10.00 0.00 2876.69
2004 3.32 c 1.50 89.00 189.50 288.00 455.00 646.00 654.00 383.00 219.50 12.00 9.50 2950.32
2005 26.00 10.50 90.00 102.50 315.50 336.00 601.50 630.50 398.00 181.50 1.00 9.50 2702.50
2006 2.50 3.00 15.50 115.50 0.00 z 477.00 631.50 581.50 465.50 0.00 z 46.50 0.00 z 2338.50
2007 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 z 0.00
2008 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 z 0.00
2009 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 482.00 143.50 18.50 0.00 644.00
2010 3.00 11.50 42.50 73.00 169.00 294.50 533.50 492.50 f 419.00 190.00 57.00 12.00 1805.00
2011 15.50 0.00 14.00 13.00 115.50 340.00 487.50 589.52 a 532.50 b 155.00 6.00 2.58 a 2271.10
2012 1.03 a 1.50 5.00 123.50 227.00 317.00 515.50 608.50 453.62 a 196.00 50.50 0.50 2499.65
2013 0.00 1.00 36.50 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 0.00 z 1.00
Period of Record Statistics
MEAN 5.35 11.67 40.00 108.15 245.26 392.50 562.74 578.96 440.04 182.02 28.62 5.80 2607.79
S.D. 6.83 13.59 33.81 47.66 75.95 67.22 68.70 62.30 65.07 48.15 22.03 9.24 222.14
SKEW 1.71 1.23 0.92 0.26 0.42 0.20 -0.26 -0.32 -0.22 0.61 0.99 2.76 0.76
MAX 26.00 46.50 122.00 214.50 433.00 518.50 680.00 686.00 570.50 303.00 97.00 44.95 3240.50
MIN 0.00 0.00 1.50 13.00 115.50 282.50 408.00 440.00 304.00 105.50 0.00 0.00 2214.50
NO YRS 37 36 36 36 34 36 35 35 37 36 37 36 29