Lewiston September 20 Weather Records

Daily averages and all-time records for weather in Lewiston, Idaho for the date of September 20.
September 20 All-Time Records
1894–2024
Highest temperature 95 °F 1938
Lowest temperature 34 °F 1983
Lowest daily high 53 °F 1968
Highest daily low 60 °F 1898
Most precipitation 0.53 inches 1969
Most snow none -
September 20 Average Weather
1991–2020 1
Average high 77.0 °F
Average low 50.5 °F
Chance precipitation 18.0%
Chance snow 0%
Lewiston September 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 64 46 0.31 0.0
2022 82 51 0.00 0.0
2021 71 51 0.00 0.0
2020 78 53 0.00 0.0
2019 68 52 0.00 0.0
2018 73 46 0.00 0.0
2017 55 48 0.14 0.0
2016 67 51 0.00 0.0
2015 88 52 0.00 0.0
2014 89 54 0.00 0.0
2013 89 50 0.00 0.0
2012 89 53 0.00 0.0
2011 79 48 0.00 0.0
2010 71 55 0.00 0.0
2009 71 52 0.00 0.0
2008 73 55 0.50 0.0
2007 69 44 0.00 0.0
2006 64 52 0.18 0.0
2005 77 49 0.00 n/a
2004 67 48 0.00 n/a
2003 74 50 0.00 n/a
2002 71 48 0.00 n/a
2001 82 47 0.00 n/a
2000 70 47 0.26 n/a
1999 86 49 0.00 n/a
1998 68 51 0.11 n/a
1997 75 44 0.00 n/a
1996 62 46 0.00 n/a
1995 72 46 0.00 0.0
1994 89 57 0.00 0.0
1993 65 48 0.00 0.0
1992 81 51 0.00 0.0
1991 79 50 0.00 0.0
1990 80 53 0.00 0.0
1989 77 48 0.00 0.0
1988 64 48 0.16 0.0
1987 85 49 0.00 0.0
1986 63 49 0.17 0.0
1985 66 42 0.00 0.0
1984 68 57 0.01 0.0
1983 68 34 0.00 0.0
1982 77 55 0.00 0.0
1981 70 45 0.00 0.0
1980 66 48 0.03 0.0
1979 92 59 0.00 0.0
1978 73 41 0.00 0.0
1977 66 52 0.12 0.0
1976 88 56 0.00 0.0
1975 76 43 0.00 0.0
1974 87 52 0.00 0.0
1973 70 53 0.23 0.0
1972 67 51 0.00 0.0
1971 69 46 0.21 0.0
1970 61 41 0.00 0.0
1969 65 49 0.53 0.0
1968 53 47 0.11 0.0
1967 89 59 0.00 0.0
1966 84 49 0.00 0.0
1965 70 45 0.01 0.0
1964 66 50 0.00 0.0
1963 84 49 0.00 0.0
1962 83 54 0.00 0.0
1961 64 45 0.10 0.0
1960 67 46 0.00 0.0
1959 64 48 0.04 0.0
1958 68 45 0.00 0.0
1957 76 47 0.00 0.0
1956 70 55 0.02 0.0
1955 69 50 0.00 0.0
1954 76 44 0.00 0.0
1953 79 43 0.00 0.0
1952 90 51 0.00 0.0
1951 75 46 0.00 0.0
1950 82 48 0.00 0.0
1949 70 41 0.00 0.0
1948 80 48 0.00 0.0
1947 77 43 0.00 0.0
1946 80 46 0.00 0.0
1945 73 39 0.13 0.0
1944 80 42 0.00 0.0
1943 79 41 0.00 0.0
1942 72 41 0.00 0.0
1941 64 40 0.06 0.0
1940 73 54 0.00 0.0
1939 93 50 0.00 n/a
1938 95 57 0.00 n/a
1937 86 51 0.00 n/a
1936 93 46 0.00 n/a
1935 85 48 0.00 n/a
1934 72 37 0.00 0.0
1933 n/a n/a n/a n/a
1932 n/a n/a n/a n/a
1931 n/a n/a n/a n/a
1930 n/a n/a n/a n/a
1929 n/a n/a n/a n/a
1928 n/a n/a n/a n/a
1927 n/a n/a n/a n/a
1926 n/a n/a n/a n/a
1925 n/a n/a n/a n/a
1924 n/a n/a n/a n/a
1923 n/a n/a n/a n/a
1922 n/a n/a n/a n/a
1921 n/a n/a n/a n/a
1920 n/a n/a n/a n/a
1919 n/a n/a n/a n/a
1918 n/a n/a n/a n/a
1917 n/a n/a n/a n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 n/a n/a n/a n/a
1913 n/a n/a n/a n/a
1912 n/a n/a n/a n/a
1911 n/a n/a n/a n/a
1910 n/a n/a n/a n/a
1909 n/a n/a n/a n/a
1908 n/a n/a n/a n/a
1907 n/a n/a n/a n/a
1906 n/a n/a n/a n/a
1905 n/a n/a n/a n/a
1904 n/a n/a n/a n/a
1903 n/a n/a n/a n/a
1902 n/a n/a n/a n/a
1901 n/a n/a n/a n/a
1900 n/a n/a n/a n/a
1899 81 47 0.00 n/a
1898 86 60 0.00 n/a
1897 n/a n/a n/a n/a
1896 n/a n/a n/a n/a
1895 62 39 0.00 n/a
1894 74 51 0.00 n/a
What's the all-time high for Lewiston on 9/20?
For the date of Sep 20, the highest temperature ever reached in Lewiston history is 95 °F which happened in 1938.
Highest Temperatures in Lewiston on September 20
Rank Temperature Year
1 95 °F 1938
2 93 °F 1936
2 93 °F 1939
4 92 °F 1979
5 90 °F 1952
6 89 °F 2012
6 89 °F 1994
6 89 °F 1967
6 89 °F 2014
6 89 °F 2013
What's the all-time low for Lewiston on 9/20?
For the date of Sep 20, the lowest temperature ever reached in Lewiston history is 34 °F which happened in 1983.
Lowest Temperatures in Lewiston on September 20
Rank Temperature Year
1 34 °F 1983
2 37 °F 1934
3 39 °F 1945
3 39 °F 1895
5 40 °F 1941
6 41 °F 1943
6 41 °F 1942
6 41 °F 1970
6 41 °F 1978
6 41 °F 1949
Lowest High Temperatures in Lewiston on September 20
Rank Temperature Year
1 53 °F 1968
2 55 °F 2017
3 61 °F 1970
4 62 °F 1895
4 62 °F 1996
6 63 °F 1986
7 64 °F 2023
7 64 °F 1941
7 64 °F 2006
7 64 °F 1959
7 64 °F 1988
7 64 °F 1961
What's the most it has ever rained in Lewiston on 9/20?
For the date of Sep 20, the most precipitation ever recorded in Lewiston history is 0.53 inches which happened in 1969.
All-Time Most Precipitation in Lewiston on September 20
Rank Precipitation Year
1 0.53 inches 1969
2 0.50 inches 2008
3 0.31 inches 2023
4 0.26 inches 2000
5 0.23 inches 1973
6 0.21 inches 1971
7 0.18 inches 2006
8 0.17 inches 1986
9 0.16 inches 1988
10 0.14 inches 2017
Weather Station Details
Years Station Coordinates
1948–2024 Lewiston Nez Perce County Airport location
1894–1947 Lewiston WTP location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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