LEWISTON WATER PLANT, IDAHO

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(105236)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 195512
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
1894 ----- z 23.82 32.10 39.73 47.10 50.83 55.00 55.58 45.67 38.58 37.03 a 25.68 41.01
1895 21.61 29.54 31.00 39.33 44.10 50.45 a 56.52 53.16 43.43 34.03 26.94 n 25.50 u 40.32
1896 29.00 32.14 32.10 38.03 43.00 a 50.15 c 59.48 d 57.52 f ----- z ----- z 29.20 e 33.23 38.48
1897 28.35 30.96 29.16 38.97 53.92 e 52.29 b 51.03 56.81 ----- z ----- z 32.55 a ----- z 41.56
1898 28.61 34.96 30.18 i 39.73 43.32 51.13 62.55 61.35 55.37 ----- z 32.47 23.65 43.31
1899 29.68 23.96 34.45 40.57 51.55 56.13 ----- z 58.16 49.93 43.03 38.33 31.65 41.59
1900 33.16 30.68 37.55 38.90 45.43 a ----- z ----- z ----- z ----- z ----- z ----- z ----- z 37.14
1901 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1902 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1903 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1904 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1905 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1906 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1907 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1908 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1909 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1910 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1911 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1912 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1913 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1914 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1915 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1916 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1917 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1918 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1919 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1920 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1921 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1922 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1923 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1924 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1925 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1926 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1927 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1928 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1929 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1930 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1931 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1932 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1933 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1934 36.03 34.61 38.39 43.37 49.61 55.43 59.87 56.26 44.40 42.19 39.80 31.42 44.28
1935 27.77 29.00 32.39 37.10 43.06 53.57 59.52 56.06 49.00 38.10 26.10 28.39 40.00
1936 29.23 12.24 32.48 42.20 50.03 57.30 61.39 57.52 46.33 36.84 21.53 28.23 39.61
1937 7.29 23.96 34.84 39.50 45.81 53.40 62.84 56.32 50.60 42.29 36.83 30.94 40.39
1938 31.00 29.61 34.55 38.87 44.48 53.80 62.48 56.68 55.67 45.10 31.63 30.00 42.82
1939 31.68 26.86 34.16 41.10 48.23 53.30 62.90 58.94 50.50 40.61 29.20 34.74 42.68
1940 28.71 34.45 37.23 43.33 48.68 57.30 62.55 57.81 56.33 45.90 30.37 28.39 44.25
1941 28.39 29.75 35.94 43.03 50.45 55.57 63.35 59.03 48.60 40.23 33.73 29.77 43.15
1942 16.26 28.93 31.10 40.70 45.74 50.43 59.94 58.65 47.80 39.39 33.80 30.55 40.27
1943 21.03 26.39 29.52 42.10 43.84 49.70 58.00 54.58 47.72 a 41.32 31.90 28.06 39.51
1944 24.06 27.00 30.35 41.20 47.68 52.14 b 57.45 53.87 50.60 40.39 33.50 28.19 40.54
1945 31.19 32.57 32.77 38.07 46.52 50.40 57.10 55.00 45.67 39.61 32.13 27.97 40.75
1946 28.52 29.36 35.39 39.70 44.55 51.40 57.16 56.32 48.27 35.26 31.10 30.42 40.62
1947 21.35 28.79 35.58 40.13 49.50 a 52.90 57.16 54.26 50.43 44.81 ----- z 34.23 42.65
1948 ----- z ----- z ----- z ----- z ----- z ----- z 54.68 54.48 47.27 37.06 32.80 22.78 d 41.51
1949 7.71 26.43 34.00 40.60 47.58 51.20 56.29 57.06 49.70 35.32 36.13 29.10 39.26
1950 11.42 27.29 34.87 38.00 43.00 52.17 a 56.58 56.20 a 48.03 44.38 b 36.63 36.87 40.45
1951 28.81 29.46 32.03 35.97 44.77 49.17 56.90 55.00 47.72 a 42.13 33.60 26.84 40.20
1952 24.05 i 31.72 33.28 b 40.50 48.07 a 52.87 56.87 56.90 49.27 39.13 26.93 30.55 42.37
1953 38.00 33.00 33.74 39.60 42.81 49.07 56.13 57.84 50.20 40.26 36.00 33.39 42.50
1954 27.74 34.89 30.65 40.03 45.03 49.83 58.23 55.19 49.67 37.84 36.70 26.26 41.01
1955 29.23 28.50 29.16 37.60 44.26 54.37 59.55 56.61 50.17 43.94 29.37 27.68 40.87
Period of Record Statistics
MEAN 25.99 28.96 33.29 39.93 46.50 52.46 58.57 56.51 49.17 40.31 32.67 29.57 41.22
S.D. 7.82 4.59 2.52 1.84 2.94 2.40 3.03 1.83 3.12 3.24 4.11 3.30 1.56
SKEW -1.12 -1.62 0.14 0.10 0.66 0.53 -0.16 0.46 0.63 -0.10 -0.63 0.10 0.76
MAX 38.00 34.96 38.39 43.37 53.92 57.30 63.35 61.35 56.33 45.90 39.80 36.87 44.28
MIN 7.29 12.24 29.16 35.97 42.81 49.07 51.03 53.16 43.43 34.03 21.53 22.78 39.26
NO YRS 26 28 27 28 28 27 27 27 26 25 26 26 19