PORTLAND WB CITY, OREGON

Monthly Total Growing Degree Days

(356749)

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
1973 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 763.50 728.50 442.00 125.00 158.00 2217.00
1974 119.00 89.50 231.00 340.00 470.50 736.50 851.00 880.50 870.50 513.00 252.50 153.50 5507.50
1975 107.00 86.50 163.50 231.00 560.00 640.50 878.00 750.00 815.50 428.00 193.00 135.50 4988.50
1976 129.50 94.50 168.00 347.50 555.00 627.00 850.50 796.50 747.00 499.00 287.00 68.00 5169.50
1977 63.00 189.00 167.50 447.50 438.00 751.50 811.00 989.50 650.50 488.50 179.50 0.00 z 5175.50
1978 106.50 205.50 372.00 358.39 b 524.00 818.50 921.50 873.17 a 652.00 548.50 123.00 55.50 5558.56
1979 5.50 107.00 355.00 387.50 617.50 747.00 945.00 0.00 z 0.00 z 0.00 z 166.50 165.33 d 3496.33
1980 35.00 151.00 207.00 449.00 548.50 603.00 889.00 808.00 717.50 519.00 250.50 174.50 5352.00
1981 171.50 161.50 295.50 385.00 546.50 658.50 857.00 996.00 722.50 420.50 259.50 102.00 5576.00
1982 78.00 126.00 219.00 282.50 557.00 750.00 800.00 873.00 690.50 455.50 130.50 78.50 5040.50
1983 150.00 199.00 329.50 388.50 644.00 640.00 795.50 877.50 650.50 458.50 242.00 52.50 5427.50
1984 153.00 172.50 333.00 302.00 486.50 618.50 862.00 858.50 676.50 374.50 169.00 23.50 5029.50
1985 14.00 0.00 z 164.00 403.00 539.00 695.50 990.00 846.00 604.00 413.00 0.00 z 23.00 4691.50
1986 157.50 165.50 386.50 318.00 530.62 a 789.50 753.50 990.50 621.00 543.50 234.50 69.50 5560.12
1987 88.00 189.00 293.50 453.00 631.50 779.50 807.00 937.00 781.50 613.00 285.50 77.50 5936.00
1988 55.00 193.50 240.50 387.50 500.50 668.00 878.50 864.50 730.00 590.50 206.50 86.50 5401.50
1989 100.50 45.50 207.00 501.00 557.00 742.50 768.00 792.00 776.00 471.00 250.50 81.00 5292.00
1990 111.50 109.50 321.00 441.50 0.00 z 690.50 946.00 934.00 814.00 410.50 242.00 59.50 5080.00
1991 92.00 293.50 190.00 324.50 441.00 582.50 0.00 z 896.00 832.00 499.00 234.00 109.00 4493.50
1992 168.50 277.00 427.00 467.00 743.00 809.50 951.00 949.00 700.00 529.50 211.00 42.50 6275.00
1993 61.50 93.50 282.50 360.00 659.50 659.50 718.00 873.00 775.00 553.00 87.50 105.00 5228.00
1994 162.50 77.00 336.50 418.00 614.00 646.50 919.00 881.00 803.00 440.50 77.50 134.00 5509.50
1995 154.00 250.50 268.00 338.00 631.00 698.00 915.00 810.50 801.50 453.00 367.50 121.00 5808.00
1996 98.50 163.00 264.50 408.50 458.50 689.00 968.00 922.00 639.50 438.50 189.50 94.50 5334.00
1997 101.00 129.00 233.00 351.50 705.50 678.00 873.00 968.00 770.00 430.50 314.00 80.50 5634.00
1998 151.50 194.50 297.00 395.50 497.00 691.50 941.50 938.50 811.00 460.00 253.00 118.00 5749.00
1999 99.50 120.00 183.00 320.69 a 447.36 b 618.75 b 824.00 880.83 b 755.00 490.00 322.00 312.07 a 5373.20
2000 50.50 146.50 204.00 441.00 533.50 751.73 d 869.07 b 844.00 706.50 472.00 127.76 a 62.00 5208.56
2001 84.73 a 100.50 268.00 298.50 612.50 617.50 802.50 893.50 749.00 447.50 265.86 a 85.00 5225.10
2002 89.50 155.00 168.50 378.00 482.50 724.50 925.50 896.50 755.50 454.00 268.00 135.50 5433.00
2003 206.50 144.00 280.00 316.50 546.00 787.00 960.50 916.50 802.00 536.09 b 163.00 104.00 5762.09
2004 54.80 c 171.00 361.50 484.50 598.00 755.00 956.00 964.00 683.00 521.00 198.50 126.00 5873.30
2005 162.50 154.50 355.50 376.50 625.50 636.00 911.50 940.50 698.00 489.00 151.00 103.00 5603.50
2006 166.50 130.00 205.50 397.50 0.00 z 777.00 941.50 891.50 765.50 0.00 z 233.50 0.00 z 4508.50
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 782.00 438.50 233.00 64.00 1517.50
2010 207.50 226.50 283.50 329.00 464.50 594.50 843.50 742.50 f 719.00 495.50 203.00 117.00 4483.50
2011 126.00 66.00 201.00 229.00 420.50 640.00 797.50 899.52 a 832.50 b 456.50 155.00 45.47 a 4868.98
2012 96.10 a 110.50 159.50 389.50 525.50 617.00 825.50 918.50 753.62 a 491.00 254.50 90.00 5231.22
2013 44.50 119.50 81.50 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 164.00
Period of Record Statistics
MEAN 108.72 150.19 261.72 373.52 550.34 692.50 872.74 888.96 740.04 480.10 213.68 100.34 5446.75
S.D. 50.69 57.24 74.36 64.99 78.99 67.21 68.70 62.30 65.07 52.21 65.83 52.76 313.49
SKEW -0.02 0.56 0.32 -0.20 0.41 0.21 -0.26 -0.32 -0.22 0.50 -0.06 1.76 0.45
MAX 207.50 293.50 427.00 501.00 743.00 818.50 990.00 996.00 870.50 613.00 367.50 312.07 6275.00
MIN 5.50 45.50 159.50 229.00 420.50 582.50 718.00 750.00 604.00 374.50 77.50 23.00 4868.98
NO YRS 37 36 36 36 34 36 35 35 37 36 37 36 29