RIVERSIDE, OREGON

Monthly Total Growing Degree Days

(357208)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201210
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
1897 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 491.00 g 832.00 996.00 545.19 d 160.00 66.50 27.00 2626.69
1898 0.00 37.50 39.50 334.14 a 297.50 g 661.00 920.00 1027.50 356.50 m 165.50 0.00 t 0.50 3185.64
1899 6.50 f 13.50 38.50 130.34 a 303.50 330.50 n 879.50 581.25 a 423.50 40.50 2.50 0.00 a 2413.09
1900 0.00 z 15.50 f 182.50 256.55 a 476.48 d 794.00 855.08 a 754.33 a 383.00 h 121.00 m 45.00 l 10.50 i 3318.95
1901 7.00 j 30.07 a 72.00 201.50 598.50 576.96 b 1039.65 d 1016.50 459.64 b 309.50 h 23.89 c 17.00 4035.72
1902 0.00 c 5.50 o 8.50 q 212.68 b 284.00 i 437.00 m 839.50 875.50 133.50 x 229.50 i 86.00 1.00 n 2013.68
1903 4.17 e 0.00 z 0.00 z 0.00 z 305.00 j 443.00 n 368.00 q 426.50 q 2.50 z 147.00 s 75.00 p 2.50 f 4.17
1904 5.17 a 1.00 z 67.54 c 357.32 b 496.00 737.07 a 969.50 993.50 611.50 312.07 a 45.00 4.28 b 4598.94
1905 3.88 c 0.00 168.00 222.00 347.00 638.28 a 1063.50 1000.50 643.00 70.50 s 26.50 0.00 b 4112.65
1906 0.00 q 1.50 37.00 308.28 a 268.00 m 553.45 a 0.00 z 764.50 f 563.08 d 53.50 r 43.50 m 6.00 n 1463.30
1907 16.69 e 24.00 h 82.50 f 197.40 e 439.17 d 341.50 m 618.50 i 0.00 z 375.00 i 327.00 h 32.50 4.00 n 685.76
1908 6.50 27.50 78.65 d 335.36 b 334.05 b 623.65 d 0.00 z 0.00 z 640.34 a 389.00 117.12 d 0.00 c 2552.17
1909 0.00 z 0.00 z 0.00 z 0.00 z 188.00 k 684.60 e 823.57 a 1042.93 c 0.00 z 226.54 e 32.00 k 0.00 z 2777.63
1910 0.00 z 0.00 z 0.00 z 327.00 h 578.50 779.00 1121.00 842.37 e 490.18 b 436.87 d 30.00 b 0.00 b 4277.91
1911 5.88 b 0.00 44.00 126.00 202.00 755.00 956.57 c 0.00 z 387.50 276.42 a 35.50 0.00 2788.87
1912 1.03 a 25.24 b 61.50 197.14 b 348.75 a 648.50 518.50 q 779.00 355.50 135.50 13.39 b 0.00 2565.56
1913 1.00 9.00 41.00 197.50 613.50 767.07 a 963.00 307.00 w 684.50 178.50 52.00 0.00 3507.07
1914 0.52 a 16.00 131.50 258.00 583.50 627.50 1010.50 983.00 544.00 343.50 48.00 o 0.00 z 4498.02
1915 0.00 9.00 203.00 440.50 326.50 634.50 1069.50 1115.50 646.73 d 310.00 54.00 14.98 a 4824.21
1916 1.07 b 8.00 138.43 b 314.50 292.00 540.50 711.00 g 805.47 b 585.00 209.00 32.07 a 5.00 2931.03
1917 0.00 0.50 18.17 b 0.00 z 284.00 h 428.50 o 1147.50 966.74 d 630.50 323.50 102.00 30.00 m 3188.91
1918 0.00 z 5.70 a 132.50 41.50 o 439.50 945.50 1018.87 a 791.50 661.50 344.00 15.00 0.00 4354.07
1919 22.50 5.50 99.50 310.00 443.00 677.00 1038.00 961.50 586.55 a 119.00 56.00 o 0.00 4262.55
1920 28.93 a 1.50 66.50 142.50 413.50 626.50 995.50 937.23 a 647.00 174.50 25.34 a 8.00 4067.01
1921 21.00 0.50 104.00 140.50 498.50 827.50 898.00 875.50 271.50 303.00 45.00 5.50 3990.50
1922 0.00 0.00 r 0.00 z 78.50 n 321.00 743.50 1007.50 944.50 665.50 336.00 10.50 0.00 4028.50
1923 17.50 3.00 58.50 192.00 449.50 529.50 944.00 683.00 g 634.50 191.50 30.50 0.00 f 3050.50
1924 0.00 13.00 0.50 180.00 515.50 576.21 a 875.00 799.59 b 504.50 195.50 46.00 g 0.00 i 3659.79
1925 1.03 a 37.00 57.50 294.00 481.50 703.50 990.00 645.32 a 461.79 b 160.50 0.00 z 0.00 z 3832.14
1926 0.00 z 0.00 z 0.00 z 293.89 c 388.65 d 743.79 a 1049.72 b 908.50 359.00 243.87 a 67.78 c 16.50 l 4055.20
1927 0.00 b 18.87 e 70.50 169.14 a 337.90 a 731.90 a 935.00 864.90 a 522.00 275.26 b 138.00 f 19.93 c 3945.39
1928 0.00 0.00 139.50 220.38 d 637.50 621.21 a 1047.36 c 181.00 x 416.00 h 177.00 u 54.11 b 0.00 a 2720.06
1929 0.00 0.00 116.00 127.00 431.86 b 673.33 c 1030.50 843.00 f 453.00 335.00 9.00 53.00 3228.70
1930 0.00 68.50 129.50 418.50 389.50 655.00 1078.50 960.00 594.00 203.50 6.50 0.00 4503.50
1931 0.00 1.50 109.50 87.00 i 615.41 d 738.50 1076.00 954.00 542.50 210.50 82.00 1.50 4331.41
1932 0.00 1.50 81.00 240.50 461.50 697.24 a 877.00 805.50 596.50 271.00 52.00 7.00 4090.74
1933 5.00 0.00 35.00 196.00 287.00 802.50 0.00 z 889.00 566.50 392.00 38.50 85.50 3297.00
1934 48.00 0.00 z 0.00 z 426.00 640.50 680.00 1023.00 1025.00 524.00 340.00 128.00 4.50 4839.00
1935 0.00 a 0.00 55.50 163.50 479.50 782.59 a 950.00 930.00 598.00 223.50 2.50 0.00 a 4185.09
1936 7.50 6.00 14.50 362.50 634.00 787.50 1092.50 965.50 536.50 336.50 10.34 a 19.50 4772.84
1937 1.07 b 2.50 61.50 k 166.00 i 496.60 e 0.00 z 0.00 z 975.98 a 381.50 j 0.00 z 41.50 g 25.50 1501.65
1938 1.00 12.50 37.41 b 228.00 f 427.50 723.00 e 964.50 523.00 j 742.00 289.50 5.50 7.23 a 3210.15
1939 0.00 1.04 a 75.50 h 337.50 348.50 f 518.50 1009.00 945.00 623.00 175.67 a 0.00 z 42.00 3651.70
1940 0.00 32.00 l 132.00 225.00 509.50 857.50 974.50 1008.02 a 514.00 272.00 8.28 a 0.00 4500.79
1941 0.00 d 1.50 h 58.50 99.00 536.00 531.00 0.00 z 0.00 z 286.50 118.00 k 31.50 4.00 k 1542.50
1942 0.00 0.00 35.50 253.50 294.50 0.00 z 962.03 a 890.00 529.62 d 311.50 39.50 g 11.00 3287.65
1943 9.00 0.00 y 62.00 j 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 9.00
1944 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
1945 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
1946 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
1947 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
1948 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
1949 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
1950 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
1951 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
1952 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
1953 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
1954 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
1955 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
1956 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
1957 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
1958 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
1959 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
1960 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
1961 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
1962 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
1963 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
1964 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
1965 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
1966 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 208.50 f 129.00 e 9.41 c 138.41
1967 36.34 b 42.00 92.00 75.00 a 486.00 720.56 c 1075.38 b 1080.35 a 798.00 307.02 e 98.28 a 26.00 4836.92
1968 0.00 80.00 150.50 171.72 a 503.75 a 774.50 1059.50 849.92 a 627.00 239.00 36.72 a 22.00 4514.61
1969 6.50 0.00 a 73.50 274.50 612.00 721.00 987.50 968.50 692.50 180.00 61.00 6.50 4583.50
1970 33.50 26.96 a 60.00 88.93 b 488.00 772.50 985.00 942.00 471.00 220.00 57.00 e 2.50 4147.39
1971 44.00 35.00 55.00 193.00 480.00 618.00 940.00 1051.50 477.86 b 262.50 24.00 5.17 a 4186.02
1972 26.00 61.50 170.50 200.69 a 535.50 770.50 950.50 955.46 c 484.00 321.50 39.31 a 23.50 4538.96
1973 6.50 20.50 63.00 182.50 527.00 729.00 994.50 922.85 e 597.50 281.50 87.00 9.00 4420.85
1974 39.27 a 11.00 98.17 a 184.50 401.89 c 845.17 a 926.50 875.50 625.50 272.00 41.50 9.50 4330.50
1975 17.00 13.50 36.50 69.00 405.00 633.00 1027.00 782.50 619.50 341.52 a 57.50 34.50 4036.52
1976 6.00 24.00 53.00 184.50 522.87 a 605.00 957.26 b 752.50 655.50 246.00 100.00 0.00 b 4106.62
1977 0.00 25.00 44.90 b 346.50 340.50 890.17 a 951.91 b 738.50 h 600.50 306.00 80.36 b 63.00 3648.84
1978 1.50 13.50 204.50 199.50 364.00 662.00 929.00 847.00 538.50 312.00 29.50 13.50 4114.50
1979 0.00 15.50 85.00 214.50 485.50 727.00 1008.00 913.00 727.50 376.50 19.04 d 6.09 c 4577.63
1980 11.50 39.00 52.00 296.50 461.00 599.00 966.50 830.50 642.50 282.50 75.00 36.00 4292.00
1981 3.00 19.92 b 74.50 288.50 419.00 665.00 897.50 1002.50 619.50 199.00 79.00 32.50 4299.92
1982 1.00 41.50 58.00 143.00 407.00 684.00 898.50 917.50 516.50 266.00 9.00 8.50 3950.50
1983 24.50 54.00 96.00 130.50 443.00 609.50 868.00 979.00 549.50 299.00 90.00 3.50 4146.50
1984 3.00 4.00 83.00 158.50 470.00 579.50 997.00 997.00 552.50 229.00 0.00 z 0.00 4073.50
1985 0.00 2.50 45.50 338.00 515.50 773.00 1144.50 838.00 410.00 226.30 a 57.50 0.00 4350.80
1986 1.50 77.00 205.00 221.50 507.00 889.50 856.00 1007.50 465.00 278.00 47.00 0.00 4555.00
1987 0.00 12.50 107.00 397.00 577.50 807.00 859.00 838.50 661.00 357.00 101.90 a 24.28 a 4742.68
1988 5.68 a 40.50 132.00 298.00 527.50 828.50 1006.50 873.00 572.50 492.50 76.50 3.00 4856.18
1989 0.00 1.00 126.50 337.00 445.50 754.00 1024.00 831.00 594.50 280.00 65.50 0.50 4459.50
1990 15.50 20.00 149.00 434.50 469.00 793.00 1107.00 983.50 818.00 284.50 59.00 0.00 5133.00
1991 7.00 53.00 80.50 239.50 455.50 640.50 1053.00 673.50 k 0.00 z 0.00 z 0.00 z 0.00 z 2529.00
1992 0.00 z 0.00 z 0.00 z 0.00 z 598.00 764.50 835.00 850.90 b 580.00 329.50 17.50 0.00 3975.40
1993 0.00 0.00 102.00 171.00 565.00 553.50 623.00 685.50 531.00 303.50 6.50 11.00 3552.00
1994 11.00 16.00 145.00 267.00 536.50 687.00 984.50 913.00 610.00 220.50 18.00 7.00 4415.50
1995 29.00 75.50 68.00 164.00 415.00 591.50 888.50 765.00 612.00 193.50 135.00 28.50 3965.50
1996 3.00 56.00 94.00 234.50 376.50 628.50 946.00 858.50 489.00 281.50 37.00 41.00 4045.50
1997 19.50 7.00 122.00 186.50 532.00 613.00 810.00 842.50 586.00 207.00 42.00 6.00 3973.50
1998 12.50 8.00 102.50 185.50 390.00 564.00 996.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2258.50
1999 7.20 c 13.00 i 75.95 a 127.76 a 341.52 a 625.18 b 853.57 b 827.50 465.54 b 0.00 z 95.00 2.21 c 3421.42
2000 0.50 g 6.04 e 63.66 c 338.89 c 486.91 b 714.83 a 895.90 a 855.08 a 513.60 e 228.37 a 0.50 l 0.00 h 4103.28
2001 0.00 j 1.50 l 142.94 d 233.65 d 513.10 b 662.14 b 870.00 943.50 647.31 d 310.55 c 58.45 a 0.00 g 4381.65
2002 1.00 2.50 92.50 244.50 453.63 a 766.73 d 1037.47 a 735.65 e 552.50 189.32 c 30.50 k 39.50 4115.31
2003 48.50 15.00 159.50 175.00 464.40 e 717.00 1037.31 e 913.90 e 608.50 251.00 o 19.50 l 30.50 4169.62
2004 1.50 3.50 136.00 i 266.50 441.75 c 708.50 950.00 865.50 507.69 d 182.00 h 27.00 j 17.00 f 3744.94
2005 9.50 10.96 e 75.00 j 214.50 479.00 555.50 947.00 894.00 482.40 e 204.50 j 23.00 h 1.50 3594.36
2006 3.50 i 0.00 z 39.35 e 240.50 490.00 739.50 1069.50 809.00 411.00 g 90.50 q 20.50 q 0.00 l 3387.85
2007 4.02 d 26.17 e 138.50 h 176.50 g 517.24 d 751.50 1122.00 875.50 429.00 g 0.00 z 10.00 k 14.00 k 3296.43
2008 0.00 l 2.50 h 49.00 f 116.00 463.50 631.00 933.00 863.00 526.00 0.00 z 41.50 h 6.50 j 3532.50
2009 16.50 h 0.00 m 67.00 h 154.00 f 420.50 g 681.00 944.00 862.50 662.40 e 120.00 m 23.50 g 0.00 i 3149.90
2010 0.00 i 14.61 e 60.81 e 85.00 m 206.00 h 655.00 889.00 808.50 455.50 g 51.50 z 36.00 t 0.00 2427.92
2011 7.50 h 20.09 e 51.50 f 32.50 w 106.00 q 262.50 n 651.00 h 740.50 g 365.50 n 54.50 w 7.50 k 15.00 n 20.09
2012 11.00 h 9.50 j 64.50 k 151.50 n 416.71 e 627.00 e 822.50 f 728.50 f 88.50 z 9.50 y 0.00 z 0.00 z 1043.71
Period of Record Statistics
MEAN 8.59 18.77 89.29 233.08 461.72 693.03 968.25 895.59 562.60 265.71 50.33 12.54 4340.18
S.D. 12.49 20.74 47.44 87.69 91.63 92.01 89.75 99.08 101.22 77.36 34.41 17.04 336.12
SKEW 1.73 1.38 0.63 0.47 -0.24 0.25 -0.57 -0.48 -0.38 0.03 0.62 1.95 0.20
MAX 48.50 80.00 205.00 440.50 640.50 945.50 1147.50 1115.50 818.00 492.50 135.00 85.50 5133.00
MIN 0.00 0.00 0.50 69.00 202.00 518.50 623.00 581.25 271.50 40.50 2.50 0.00 3552.00
NO YRS 75 72 73 76 81 83 81 76 77 69 65 69 34