RIVERSIDE, OREGON

Monthly Total Heating Degree Days

(357208)

Base Temperature = 65 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 119.00 g 61.00 6.00 214.04 d 629.00 827.50 967.00 2704.54
1898 1401.00 814.00 893.00 415.86 a 303.50 g 127.00 32.50 4.50 102.50 m 632.50 310.00 t 1296.00 5616.36
1899 808.50 f 946.00 815.50 643.45 a 487.00 119.00 n 30.00 206.67 a 333.50 846.50 899.50 1629.57 a 6837.68
1900 0.00 z 628.50 f 604.50 504.31 a 299.09 d 70.50 48.05 a 88.35 a 167.00 h 346.50 m 534.50 l 645.50 i 1614.80
1901 716.00 j 928.15 a 775.50 582.00 203.00 205.71 b 17.22 d 9.50 294.64 b 272.50 h 786.11 c 1054.50 4856.34
1902 1259.38 c 425.50 o 380.00 q 545.89 b 268.50 i 32.50 m 79.00 41.00 27.50 x 326.50 i 795.00 639.50 n 2720.27
1903 1086.19 e 46.00 z 0.00 z 0.00 z 236.50 j 11.00 n 25.00 q 1.00 q 47.50 z 153.00 s 290.50 p 801.50 f 1086.19
1904 928.45 a 24.00 z 771.68 c 394.29 b 286.50 107.07 a 8.50 22.50 165.00 462.93 a 750.00 1160.36 b 5057.28
1905 1129.29 c 1112.00 633.00 532.00 432.50 126.72 a 8.00 11.00 121.50 230.50 s 955.00 1322.84 b 6383.85
1906 570.00 q 958.00 1023.50 453.62 a 184.00 m 204.31 a 0.00 z 18.50 f 199.62 d 290.50 r 586.50 m 523.00 n 2839.05
1907 1140.44 e 500.00 h 589.50 f 556.80 e 349.04 d 97.50 m 17.50 i 0.00 z 150.50 i 248.00 h 813.00 569.00 n 2859.28
1908 1014.50 856.50 802.56 d 419.46 b 440.95 b 161.54 d 0.00 z 0.00 z 152.59 a 386.00 816.35 d 1388.91 c 6439.35
1909 71.00 z 0.00 z 0.00 z 0.00 z 331.00 k 96.60 e 58.90 a 0.55 c 0.00 z 548.46 e 529.50 k 0.00 z 704.52
1910 0.00 z 0.00 z 0.00 z 223.00 h 206.50 50.00 0.00 71.54 e 259.82 b 338.13 d 847.50 b 1074.84 b 2848.33
1911 1245.34 b 1245.50 821.50 725.00 574.00 128.00 33.21 c 0.00 z 362.50 512.02 a 901.50 1216.50 7765.08
1912 1167.15 a 876.98 b 792.00 565.18 b 426.25 a 114.00 0.00 q 61.00 394.50 643.00 888.75 b 1219.50 7148.31
1913 1216.50 956.00 874.00 573.00 252.00 72.41 a 17.50 0.00 w 129.00 603.00 764.50 1312.00 6769.91
1914 1099.47 a 881.00 663.50 492.00 194.50 171.50 5.00 2.50 216.50 431.50 370.00 o 0.00 z 4157.47
1915 1365.00 778.00 586.50 309.50 449.50 171.00 8.00 0.00 162.12 d 465.00 840.50 1070.02 a 6205.13
1916 1396.60 b 845.00 679.86 b 435.50 487.00 218.50 27.50 g 58.26 b 173.00 568.00 961.55 a 1198.50 7021.78
1917 1316.50 991.50 1037.97 b 0.00 z 291.00 h 2.00 o 0.00 0.00 d 128.00 468.50 724.00 495.00 m 4666.47
1918 0.00 z 946.30 a 707.50 370.50 o 335.50 25.50 0.00 a 42.00 99.00 435.00 896.50 1290.50 4777.80
1919 1133.00 879.50 733.00 442.00 350.00 91.00 2.50 0.00 171.21 a 762.00 442.00 o 1438.00 6002.21
1920 1188.33 a 880.00 772.50 650.00 361.50 139.50 4.50 44.43 a 147.50 663.00 888.10 a 1048.50 6787.87
1921 1112.50 1000.00 694.00 661.00 276.50 46.50 28.00 7.00 484.50 472.00 786.00 1235.50 6803.50
1922 1778.00 389.50 r 32.50 z 345.00 n 454.50 103.50 0.00 22.00 118.50 451.00 956.50 1205.50 5089.50
1923 1054.00 1036.00 810.50 560.50 327.00 238.50 12.00 6.50 g 154.50 586.50 817.50 1063.00 f 5597.00
1924 1290.00 758.50 923.00 571.00 259.50 177.93 a 21.00 45.43 b 253.00 579.50 627.50 g 1068.00 i 4878.86
1925 1076.73 a 768.50 796.00 456.50 294.00 149.00 17.00 143.12 a 291.96 b 616.00 0.00 z 0.00 z 4608.81
1926 0.00 z 0.00 z 0.00 z 462.22 c 386.35 d 98.28 a 0.00 b 29.50 411.00 535.78 a 730.00 c 681.00 l 2653.13
1927 1091.95 b 832.09 e 775.00 627.93 a 451.05 a 72.41 a 14.00 34.62 a 242.00 520.59 b 499.00 f 1213.98 c 5875.62
1928 1137.50 1029.50 676.00 542.31 d 162.50 174.83 a 19.93 c 2.50 x 139.50 h 75.00 u 866.79 b 1453.38 a 6062.73
1929 1319.50 1199.50 718.50 680.00 354.90 b 148.33 c 3.50 0.00 f 316.00 441.00 998.50 998.00 7177.73
1930 1618.00 720.00 680.00 339.50 389.00 141.50 2.00 1.00 173.50 593.50 1006.50 1344.50 7009.00
1931 1179.00 892.50 703.00 453.00 i 200.93 d 74.00 2.50 12.50 267.50 578.00 970.00 1370.50 6250.43
1932 1267.50 1178.50 773.00 515.00 325.50 132.41 a 19.50 62.00 179.00 525.50 800.50 1338.50 7116.91
1933 1204.50 1285.00 828.00 599.50 494.00 50.00 0.00 z 42.50 187.50 389.50 817.00 791.50 6689.00
1934 861.50 0.00 z 0.00 z 328.50 169.50 138.50 13.00 0.00 260.50 439.50 666.50 1136.00 4013.50
1935 1197.63 a 973.50 873.50 588.00 316.50 54.83 a 17.50 23.00 162.00 651.00 1052.00 1283.40 a 7192.86
1936 1176.50 1064.50 897.50 417.00 163.00 58.50 0.50 24.00 220.50 452.50 1011.21 a 1146.50 6632.21
1937 1729.59 b 1005.00 464.50 k 360.00 i 279.60 e 0.00 z 0.00 z 38.75 a 143.50 j 0.00 z 545.50 g 880.50 3933.43
1938 971.00 822.50 808.14 b 379.50 f 351.50 76.80 e 31.50 44.00 j 59.50 485.50 1018.00 1044.70 a 5669.14
1939 1059.00 968.59 a 591.00 h 412.50 276.50 f 255.50 11.00 10.50 148.50 600.88 a 0.00 z 979.00 4445.48
1940 1119.50 466.50 l 667.00 525.00 265.50 80.50 1.50 0.00 a 237.50 504.50 994.66 a 1148.00 5543.66
1941 1111.41 d 622.00 h 751.50 664.50 240.50 220.50 0.00 z 0.00 z 466.50 387.50 k 903.50 732.00 k 4358.41
1942 1381.50 1042.50 920.00 508.00 480.50 0.00 z 2.58 a 60.00 231.35 d 475.00 615.50 g 970.50 6071.93
1943 1211.00 123.00 y 527.00 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 1211.00
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 421.50 f 678.00 e 1056.21 c 1734.21
1967 857.84 b 725.50 758.50 696.72 a 302.00 105.00 c 0.00 b 0.00 a 63.50 469.77 e 746.38 a 1164.00 5889.22
1968 1090.00 711.00 651.50 602.59 a 272.80 a 70.50 0.50 76.47 a 167.00 537.00 786.21 a 1029.00 5994.56
1969 1109.00 1013.70 a 836.50 476.50 174.00 86.00 5.00 13.00 102.00 624.50 814.50 986.50 6241.20
1970 962.00 725.93 a 773.50 693.75 b 291.00 105.00 3.50 2.00 286.50 594.50 753.00 e 1126.00 6316.68
1971 953.00 802.00 864.50 559.50 295.50 163.50 30.50 12.50 276.43 b 556.50 838.00 1081.38 a 6433.31
1972 1107.00 884.00 638.50 570.52 a 255.50 49.00 15.00 14.95 c 274.50 485.00 790.86 a 1289.50 6374.33
1973 1149.50 787.50 751.50 576.50 263.50 120.00 7.50 14.90 e 170.00 494.50 786.00 911.00 6032.40
1974 1133.57 a 798.50 753.82 a 570.50 373.11 c 50.17 a 31.00 26.00 137.50 506.00 791.50 1027.00 6198.66
1975 1124.00 845.00 840.00 722.50 370.00 136.00 14.50 59.50 144.00 447.95 a 866.00 1000.00 6569.45
1976 1014.50 936.50 890.00 589.00 256.27 a 174.50 13.36 b 81.00 124.00 532.50 752.00 1168.38 b 6532.01
1977 1405.00 827.00 822.03 b 406.50 439.50 20.17 a 18.71 b 42.00 h 192.50 469.00 812.14 b 891.00 6303.56
1978 1012.00 781.50 597.00 554.00 411.00 117.00 23.50 61.50 242.00 477.50 931.00 1255.50 6463.50
1979 1578.50 847.50 742.00 544.00 293.00 111.00 14.50 9.00 67.50 400.00 868.27 d 999.75 c 6475.02
1980 1124.50 797.00 780.50 465.50 320.50 195.50 0.00 34.50 135.00 512.50 806.50 1057.00 6229.00
1981 995.50 861.00 b 725.50 475.50 357.50 126.50 21.00 5.00 169.00 578.00 746.00 961.00 6021.50
1982 1260.50 933.50 777.00 651.00 368.00 126.50 36.00 15.50 248.50 527.50 969.50 1150.00 7063.50
1983 943.00 732.50 694.50 642.00 355.00 152.00 44.50 8.50 204.50 476.00 753.00 1228.00 6233.50
1984 1326.50 989.50 718.00 601.00 314.50 218.50 1.50 8.50 226.00 590.50 0.00 z 1244.50 6239.00
1985 1268.00 1037.50 874.00 422.50 263.00 68.00 0.50 35.50 344.00 580.73 a 1075.00 1695.50 7664.23
1986 1137.50 730.00 582.50 528.50 325.50 28.00 38.00 2.50 308.00 497.00 779.00 1197.50 6154.00
1987 1355.50 805.00 703.50 359.50 213.00 65.50 43.00 34.50 121.50 418.00 811.03 a 1092.75 a 6022.78
1988 1263.77 a 832.50 700.50 458.50 259.50 96.50 10.00 14.00 204.50 282.50 778.50 1205.00 6105.77
1989 1209.50 1128.50 694.50 413.00 330.00 55.50 0.00 47.50 162.50 518.50 831.00 1146.50 6537.00
1990 973.00 896.50 670.00 318.00 310.00 77.50 7.00 31.00 42.00 500.50 807.50 1436.50 6069.50
1991 1226.00 712.50 725.00 517.00 319.50 133.50 0.00 0.00 k 0.00 z 0.00 z 0.00 z 0.00 z 3633.50
1992 0.00 z 0.00 z 0.00 z 0.00 z 189.50 85.50 45.50 79.10 b 181.00 452.50 930.00 1229.00 3192.10
1993 1383.00 1121.50 807.00 582.00 218.50 217.50 167.00 125.50 227.50 474.00 1060.00 1059.50 7443.00
1994 958.50 959.50 661.00 486.00 244.50 114.00 10.00 12.50 143.00 572.50 1024.00 1191.00 6376.50
1995 960.00 693.50 783.50 604.50 360.00 182.00 23.00 85.50 164.50 599.00 688.50 1046.00 6190.00
1996 1041.00 925.00 719.00 521.00 403.00 142.50 20.50 36.50 270.50 539.00 803.50 925.00 6346.50
1997 1044.50 914.00 715.00 617.50 254.00 143.50 48.00 21.00 186.50 590.50 786.50 1097.50 6418.50
1998 897.00 820.00 753.00 582.00 386.00 188.50 0.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3627.00
1999 1011.38 c 615.50 i 792.05 a 673.45 a 454.15 a 172.50 b 31.00 b 42.00 291.96 b 0.00 z 748.00 1101.61 c 5318.09
2000 793.50 g 807.17 e 762.27 c 411.11 c 290.76 b 85.34 a 29.97 a 35.13 a 243.60 e 556.45 a 651.50 l 840.50 h 3221.80
2001 889.00 j 609.50 l 678.56 d 586.15 d 272.05 b 127.50 b 39.00 6.00 126.92 d 468.88 c 815.17 a 852.00 g 3120.23
2002 1049.00 924.00 810.00 511.50 335.83 a 90.00 d 0.00 a 82.87 e 207.50 632.73 c 519.00 k 948.00 5591.43
2003 866.00 898.00 653.50 586.50 351.13 e 79.00 0.60 e 2.38 e 168.00 153.00 o 562.00 l 932.00 4537.12
2004 1180.00 959.50 433.50 i 486.50 333.25 c 113.00 10.00 61.00 249.81 d 403.50 h 588.00 j 765.50 f 3393.06
2005 1046.00 856.43 e 469.50 j 540.00 296.50 210.50 7.50 26.00 268.80 e 321.00 j 636.50 h 1263.00 4514.73
2006 668.00 i 0.00 z 859.65 e 514.50 301.50 67.50 1.00 52.50 187.00 g 281.00 q 350.00 q 773.00 l 1796.65
2007 1182.59 d 796.17 e 446.50 h 410.00 g 261.78 d 82.00 0.00 17.50 157.50 g 0.00 z 570.00 k 712.00 k 2340.04
2008 818.00 l 641.00 h 648.00 f 687.50 334.00 152.50 4.00 31.50 224.50 0.00 z 587.00 h 803.50 j 1434.00
2009 761.00 h 521.50 m 559.00 h 454.50 f 201.50 g 95.50 13.50 46.50 115.80 e 358.50 m 700.50 g 839.50 i 271.30
2010 669.50 i 802.26 e 769.04 e 366.00 m 369.00 h 132.50 39.50 56.00 130.50 g 73.50 z 323.00 t 1146.00 2945.30
2011 818.00 h 890.52 e 617.00 f 143.50 w 244.00 q 137.50 n 11.00 h 1.00 g 56.00 n 158.50 w 599.00 k 624.00 n 890.52
2012 754.00 h 579.00 j 478.00 k 267.50 n 358.29 e 159.60 e 2.00 f 11.00 f 15.00 z 162.00 y 0.00 z 0.00 z 517.89
Period of Record Statistics
MEAN 1163.11 902.50 761.79 532.94 322.90 121.27 18.53 34.91 208.73 525.42 848.88 1153.12 6474.80
S.D. 184.51 131.44 92.94 99.29 86.67 54.02 23.87 36.01 88.09 91.51 99.61 171.02 433.83
SKEW 1.03 0.77 0.50 -0.22 0.37 0.36 3.35 2.05 0.83 0.49 0.54 0.64 1.06
MAX 1778.00 1285.00 1037.97 725.00 574.00 255.50 167.00 206.67 484.50 846.50 1075.00 1695.50 7664.23
MIN 857.84 693.50 582.50 309.50 162.50 20.17 0.00 0.00 42.00 282.50 666.50 791.50 5889.22
NO YRS 75 72 73 76 81 83 81 76 77 69 65 69 34