RIVERSIDE, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(357208)

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.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
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 ----- z ----- z ----- z ----- z ----- z 46.61 g 47.29 49.55 37.96 d 24.26 19.77 23.32 33.69
1898 6.35 24.11 20.71 30.28 a 33.36 f 41.80 46.29 51.81 42.12 m 27.68 24.90 t 12.23 29.03
1899 21.68 f 21.07 26.87 27.34 a 33.16 40.88 n 42.58 33.40 a 24.33 14.61 16.30 -3.37 a 23.63
1900 ----- z 25.09 f 29.68 32.34 a 39.67 a 46.67 44.67 a 45.52 38.23 h 30.67 m 22.56 l 28.96 h 39.76
1901 20.77 i 21.52 a 26.58 29.87 42.39 38.86 a 50.15 d 50.94 37.90 a 36.42 e 26.93 a 22.19 34.89
1902 12.25 c 24.85 o 26.57 q 32.79 b 38.27 i 47.47 m 45.32 46.06 38.50 x 27.73 i 26.10 6.65 n 32.50
1903 9.14 b 3.82 26.07 c 29.08 d 38.28 f 50.00 n 48.00 p 48.93 q 33.50 z 37.42 s 38.93 o 26.48 d 18.92
1904 26.57 a 30.00 z 30.07 b 33.87 32.94 40.97 a 46.81 46.87 35.93 29.17 a 21.07 14.76 b 32.64
1905 17.06 10.50 27.00 25.77 32.39 40.87 50.71 47.65 36.17 14.67 p 10.27 10.61 28.09
1906 11.52 20.89 17.58 31.27 34.65 k 37.10 a ----- z 46.04 f 34.00 c 20.67 p 13.29 m 25.60 k 25.39
1907 17.27 e 26.08 d 29.70 d 26.12 d 34.03 a 40.91 g 42.35 e ----- z 30.32 e 32.00 e 21.57 21.00 m 28.83
1908 23.58 22.66 26.89 d 28.97 30.52 41.48 a ----- z ----- z 35.80 27.10 18.77 11.89 c 26.76
1909 22.36 c 26.86 25.74 24.37 30.78 d 42.64 b 44.20 a 52.82 c ----- z 29.17 b 25.30 c 4.90 29.92
1910 2.22 d ----- z 29.97 29.96 c 33.52 41.97 53.55 40.57 a 33.68 b 27.56 d 23.59 a 24.29 30.99
1911 13.03 a 6.39 22.77 23.90 30.42 43.57 45.46 c ----- z 28.70 22.97 a 19.50 14.77 24.68
1912 17.20 a 24.89 a 22.68 29.53 33.27 a 36.87 55.71 q 39.42 28.57 23.39 20.61 b 12.65 26.28
1913 14.71 17.64 21.13 29.90 39.81 47.03 51.19 58.25 w 37.23 26.29 27.03 10.39 29.31
1914 19.37 a 24.61 27.13 31.23 38.58 39.77 50.94 47.74 36.23 32.71 20.27 o ----- z 34.83
1915 8.03 28.57 29.81 36.97 35.65 40.10 52.87 53.26 38.38 d 27.06 24.57 19.61 32.91
1916 8.86 b 27.24 26.63 a 28.80 30.84 34.90 46.79 g 38.21 b 34.20 24.45 14.97 a 14.74 25.80
1917 10.00 19.11 18.87 ----- z 35.45 39.67 57.68 47.04 d 37.97 25.32 22.53 26.78 m 31.36
1918 ----- z 20.30 a 28.81 23.13 o 29.68 50.00 52.80 a 43.29 41.10 32.35 21.80 10.26 33.04
1919 14.94 24.61 28.16 32.40 34.26 34.70 51.90 48.16 36.59 a 24.19 22.53 o 8.90 30.80
1920 16.10 a 20.31 29.19 27.90 30.52 41.60 51.94 47.27 a 42.50 27.61 24.86 a 23.55 31.95
1921 20.19 20.21 30.42 26.57 40.00 50.30 44.87 46.19 29.80 26.13 23.57 15.87 31.18
1922 -2.94 15.50 17.10 26.10 30.68 41.97 52.13 52.87 40.33 31.90 20.87 17.71 28.68
1923 21.65 15.11 23.10 31.43 38.35 42.23 48.97 48.04 g 39.77 31.45 22.53 13.68 29.84
1924 13.97 28.34 21.35 27.53 34.58 38.48 a 47.16 44.30 a 38.87 29.35 27.96 f 4.72 f 32.39
1925 22.50 a 28.96 23.45 35.40 38.03 47.07 53.74 42.68 38.40 28.42 ----- z ----- z 35.87
1926 ----- z ----- z ----- z 33.31 a 35.58 44.45 a 53.71 49.35 32.30 25.68 27.32 b 21.35 k 37.71
1927 22.03 b 27.43 e 26.16 29.97 36.19 47.79 a 48.26 47.58 41.07 27.81 33.84 e 16.00 b 33.68
1928 20.58 18.41 31.52 30.86 b 40.13 45.43 55.14 c 45.71 x 36.09 h 38.88 n 22.54 b 5.13 a 29.97
1929 12.16 8.29 28.32 27.97 35.14 b 45.14 b 52.61 51.32 f 34.53 27.39 11.40 18.81 27.43
1930 0.77 29.18 28.97 36.90 36.52 41.43 55.45 49.97 40.03 25.26 14.50 9.77 30.73
1931 18.26 21.64 28.65 25.29 i 40.96 d 49.00 53.00 47.87 39.53 27.13 18.30 10.42 32.25
1932 13.19 11.24 29.65 32.23 39.06 43.72 a 48.55 44.68 37.07 29.71 25.80 11.39 30.52
1933 15.10 5.57 26.03 27.47 35.00 49.97 50.84 48.19 36.93 29.35 22.53 30.45 31.45
1934 27.19 ----- z ----- z 35.13 41.87 47.53 51.68 50.23 35.60 33.35 30.40 20.42 37.34
1935 16.63 a 18.54 24.58 30.67 38.29 46.87 51.39 47.58 37.63 29.13 20.17 13.45 31.24
1936 19.77 19.41 25.61 33.30 41.81 48.40 54.77 51.00 36.00 26.35 10.62 a 14.84 31.82
1937 -5.03 a 16.25 28.85 k 30.86 i 34.73 e ----- z ----- z 53.20 a 36.25 j 30.71 28.83 f 24.94 25.80
1938 23.42 26.04 28.14 b 32.08 f 34.74 42.08 e 52.03 44.24 j 41.87 31.42 19.60 20.00 31.93
1939 19.68 20.14 25.09 h 28.63 33.76 f 37.07 51.68 47.29 38.33 28.42 ----- z 20.48 32.41
1940 20.39 26.59 l 28.84 32.50 33.94 47.47 51.16 49.45 42.23 29.42 19.62 a 16.00 33.73
1941 19.63 d 24.50 h 23.19 25.73 37.29 37.27 ----- z ----- z 34.00 27.60 k 20.47 20.40 k 28.23
1942 10.23 17.25 20.74 30.20 31.26 ----- z 45.55 44.90 36.77 d 28.77 26.87 g 26.00 29.17
1943 16.29 12.67 y 23.38 j ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 16.29
1944 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1945 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1946 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1947 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1949 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1950 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1951 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1952 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1953 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1954 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1955 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1956 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1957 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1958 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1959 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1960 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1961 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1962 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1963 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1964 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1965 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1966 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 29.04 f 31.19 d 23.86 b 27.53
1967 28.97 b 26.71 28.03 29.62 a 37.74 46.61 b 53.97 b 53.00 a 46.70 31.93 d 28.66 a 16.19 35.68
1968 20.35 29.24 28.77 28.52 a 39.93 a 48.70 54.29 52.37 a 42.80 31.71 30.66 a 24.00 35.95
1969 20.29 19.48 a 25.29 33.37 42.16 48.77 52.58 50.48 44.43 29.65 22.13 24.61 34.44
1970 25.94 26.22 a 27.74 27.79 b 38.90 50.47 53.39 50.10 38.53 30.52 29.44 e 20.35 34.95
1971 25.61 24.36 25.13 30.90 39.52 45.83 52.16 56.55 38.31 a 31.58 25.53 21.60 a 34.76
1972 19.48 23.69 30.03 31.69 a 40.45 49.90 53.06 53.39 c 39.80 33.97 29.07 a 14.55 34.92
1973 19.52 26.71 28.77 29.73 39.94 47.47 53.77 52.67 d 43.93 33.29 30.67 28.26 36.23
1974 19.27 a 25.57 29.87 a 32.17 37.76 b 49.28 a 53.45 50.16 40.77 31.90 27.40 23.52 35.09
1975 18.55 25.54 26.94 29.10 37.23 46.03 57.68 48.65 40.87 37.90 a 24.67 23.32 34.70
1976 23.52 21.69 22.52 30.27 39.53 a 43.93 54.59 b 50.35 45.60 29.45 23.47 11.50 a 33.03
1977 8.13 21.07 24.87 a 33.03 37.32 51.83 a 52.03 b 54.96 g 43.60 32.48 26.86 b 28.84 32.73
1978 24.97 29.54 31.35 33.77 36.26 44.40 51.00 48.39 41.30 28.32 19.90 14.06 33.60
1979 2.81 26.36 27.71 32.70 39.16 45.70 53.48 53.61 44.50 37.58 23.69 d 23.93 c 34.27
1980 21.16 29.55 28.00 33.07 40.39 43.80 52.55 48.06 44.07 31.55 26.87 21.48 35.05
1981 27.65 23.31 b 27.19 34.27 39.06 45.23 48.97 51.94 41.20 30.84 29.83 26.03 35.46
1982 15.90 21.96 28.52 27.60 36.10 46.00 50.81 50.19 40.37 32.06 21.27 19.39 32.51
1983 26.55 30.54 32.19 29.90 37.74 43.23 49.32 54.00 38.13 32.87 30.93 17.94 35.28
1984 13.65 22.48 29.94 31.63 39.52 42.97 53.39 53.13 39.63 31.94 ----- z 15.81 34.01
1985 15.23 17.54 24.35 33.47 40.71 45.93 57.03 48.81 37.53 29.58 18.23 -1.61 30.57
1986 20.35 29.96 31.94 31.97 39.77 50.30 48.58 53.16 40.67 30.71 26.60 17.71 35.14
1987 10.74 26.00 29.65 34.17 41.58 49.13 50.03 46.39 39.57 29.71 26.79 a 21.71 33.79
1988 14.50 a 23.41 26.87 33.30 40.13 51.27 51.90 47.06 38.27 34.68 30.10 17.06 34.05
1989 17.35 15.18 31.94 35.40 38.39 47.23 53.39 48.90 39.63 31.13 23.93 14.06 33.04
1990 23.87 19.82 27.77 37.20 39.45 49.33 56.23 53.42 47.10 31.68 25.23 7.06 34.85
1991 13.97 28.21 29.87 34.50 41.03 45.20 52.71 52.85 k ----- z ----- z ----- z ----- z 35.07
1992 ----- z ----- z ----- z ----- z 37.48 46.67 47.52 45.34 b 37.63 29.97 25.00 15.68 35.66
1993 11.65 16.82 29.23 32.63 41.39 42.00 41.65 41.84 34.00 33.32 12.50 21.39 29.87
1994 23.84 16.93 25.45 31.80 40.58 43.67 50.58 47.84 37.83 27.19 21.70 18.74 32.18
1995 27.77 26.86 27.06 30.60 38.00 42.97 49.52 41.23 39.10 26.35 29.87 24.06 33.62
1996 23.32 20.83 26.94 31.53 36.26 41.80 47.77 45.71 35.57 30.13 25.47 27.81 32.76
1997 22.87 19.71 24.39 27.00 36.77 42.23 45.19 44.87 39.20 26.10 25.77 20.26 31.20
1998 27.74 26.25 26.48 30.77 40.42 40.10 51.16 ----- z ----- z ----- z ----- z ----- z 34.70
1999 22.89 c 22.11 i 26.23 a 25.55 a 31.17 a 41.75 b 43.76 b 45.29 30.75 b ----- z 25.13 19.18 c 31.17
2000 24.08 g 27.17 e 25.11 c 32.89 c 39.28 b 42.48 a 47.40 a 44.10 a 36.48 e 30.47 a 18.74 k 20.74 h 36.15
2001 12.24 j 15.35 k 28.78 d 28.62 d 35.14 b 41.50 b 47.42 47.29 39.12 d 30.71 c 23.66 a 22.08 g 35.80
2002 23.45 19.89 24.03 30.37 35.33 a 45.78 c 52.47 a 41.69 e 34.73 22.54 c 21.32 k 24.90 32.29
2003 29.71 19.04 29.71 31.03 37.58 e 42.17 51.52 d 47.65 e 36.80 32.82 n 21.56 l 26.39 35.16
2004 19.61 22.66 27.14 i 28.70 37.82 c 44.37 48.81 48.10 35.46 d 31.52 h 23.80 j 24.64 f 35.69
2005 22.65 18.33 d 26.62 j 31.83 40.94 38.97 46.58 45.16 31.96 d 29.14 j 23.05 h 16.06 32.50
2006 26.59 i ----- z 25.19 e 31.60 36.90 44.63 51.87 42.71 35.04 g 20.93 q 26.31 q 13.85 k 38.82
2007 13.26 d 24.00 e 28.52 h 28.21 f 34.86 c 43.97 53.61 44.77 37.96 e ----- z 19.47 k 19.75 k 36.06
2008 9.16 l 23.10 h 25.12 f 23.07 36.68 40.17 46.58 44.35 33.50 ----- z 24.45 h 13.67 j 37.39
2009 24.50 e 16.53 m 24.96 g 28.00 f 39.24 f 46.13 47.68 45.94 38.12 d 28.74 l 19.00 g 17.09 i 40.47
2010 26.91 i 27.83 e 23.69 e 25.28 l 33.26 h 43.47 44.58 43.48 37.83 g 31.40 z 20.60 t 19.23 33.71
2011 20.17 g 21.42 d 29.35 e 31.43 w 30.73 p 39.56 n 44.87 h 48.00 g 37.88 n 29.25 w 19.21 k 13.06 n 25.38
2012 19.78 h 20.89 j 25.40 k 29.06 n 31.96 e 40.00 e 50.36 f 43.48 f 34.50 z 20.17 y ----- z ----- z 35.98
Period of Record Statistics
MEAN 17.57 21.85 26.77 30.65 36.99 44.14 50.45 47.75 37.90 29.38 23.46 17.73 33.27
S.D. 7.28 5.85 3.26 3.02 3.35 3.94 3.66 4.17 4.18 3.69 5.15 6.82 1.92
SKEW -0.85 -0.99 -0.84 -0.19 -0.49 -0.18 -0.41 -0.58 -0.46 -0.72 -0.57 -0.65 -0.46
MAX 29.71 30.54 32.19 37.20 42.39 51.83 57.68 56.55 47.10 37.90 33.84 30.45 36.23
MIN -5.03 3.82 17.10 23.07 29.68 34.70 41.65 33.40 24.33 14.61 10.27 -3.37 28.68
NO YRS 79 76 79 80 83 84 83 76 79 72 67 72 37