Kennewick September 21 Weather Records

Daily averages and all-time records for weather in Kennewick, Washington for the date of September 21.
September 21 All-Time Records
1894–2024
Highest temperature 94 °F 1967
Lowest temperature 31 °F 1907
Lowest daily high 58 °F 2000
Highest daily low 60 °F 2013
Most precipitation 0.15 inches 1972
September 21 Average Weather
1991–2020 1
Average high 78.5 °F
Average low 47.2 °F
Chance precipitation 10.9%
Kennewick September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 59 47 0.01 n/a
2022 78 49 0.00 n/a
2021 79 39 0.00 n/a
2020 82 47 0.00 n/a
2019 79 47 0.00 n/a
2018 82 43 0.00 0.0
2017 65 37 0.00 0.0
2016 73 39 0.00 0.0
2015 80 50 0.00 0.0
2014 89 51 0.00 0.0
2013 76 60 0.01 0.0
2012 81 47 0.00 0.0
2011 84 40 0.00 n/a
2010 71 46 0.00 n/a
2009 80 36 0.00 n/a
2008 75 54 0.00 n/a
2007 77 36 0.00 n/a
2006 71 50 0.00 n/a
2005 74 37 0.00 n/a
2004 72 37 0.00 n/a
2003 77 39 0.00 n/a
2002 73 39 0.00 n/a
2001 84 45 0.00 n/a
2000 58 45 0.03 n/a
1999 87 41 0.00 n/a
1998 70 49 0.00 0.0
1997 77 47 0.00 0.0
1996 66 43 0.00 0.0
1995 78 48 0.00 0.0
1994 90 56 0.00 0.0
1993 68 40 0.00 0.0
1992 87 58 0.00 0.0
1991 82 49 0.00 0.0
1990 80 48 0.00 0.0
1989 79 46 0.00 0.0
1988 68 47 0.00 0.0
1987 85 49 0.00 0.0
1986 72 49 0.00 0.0
1985 75 39 0.00 0.0
1984 76 48 0.00 0.0
1983 70 39 0.00 0.0
1982 73 51 0.00 0.0
1981 78 45 0.00 0.0
1980 71 49 0.00 0.0
1979 91 54 0.00 0.0
1978 77 44 0.00 0.0
1977 70 49 0.01 0.0
1976 85 55 0.00 0.0
1975 80 41 0.00 0.0
1974 86 50 0.00 0.0
1973 76 57 0.00 0.0
1972 75 55 0.15 0.0
1971 70 38 0.00 0.0
1970 71 45 0.00 0.0
1969 73 50 0.00 0.0
1968 65 49 0.00 0.0
1967 94 55 0.00 0.0
1966 86 52 0.00 0.0
1965 80 55 0.00 n/a
1964 70 45 0.00 0.0
1963 81 53 0.00 0.0
1962 85 54 0.00 0.0
1961 67 45 0.00 0.0
1960 69 39 0.00 0.0
1959 72 54 0.00 0.0
1958 70 57 0.00 0.0
1957 78 41 0.00 0.0
1956 70 49 0.00 0.0
1955 68 43 0.05 0.0
1954 76 45 0.00 0.0
1953 80 42 0.00 0.0
1952 84 56 0.00 0.0
1951 78 40 0.00 0.0
1950 83 43 0.00 0.0
1949 79 37 0.00 0.0
1948 79 51 0.00 0.0
1947 84 46 0.00 0.0
1946 70 54 0.00 0.0
1945 62 41 0.01 0.0
1944 83 55 0.02 0.0
1943 88 48 0.00 0.0
1942 88 47 0.00 n/a
1941 73 36 0.00 n/a
1940 73 45 0.00 n/a
1939 94 60 n/a n/a
1938 90 51 0.00 n/a
1937 75 51 n/a n/a
1936 90 48 n/a n/a
1935 80 45 n/a n/a
1934 73 46 0.00 0.0
1933 71 50 0.00 0.0
1932 72 35 n/a n/a
1931 70 45 0.00 n/a
1930 86 51 0.00 n/a
1929 65 46 n/a n/a
1928 80 40 0.00 n/a
1927 76 53 0.00 n/a
1926 67 50 0.00 n/a
1925 76 41 0.00 n/a
1924 79 47 0.00 n/a
1923 66 54 0.01 n/a
1922 77 52 0.00 n/a
1921 71 50 0.00 0.0
1920 66 50 0.00 n/a
1919 82 40 0.00 n/a
1918 83 55 0.00 n/a
1917 78 52 0.00 0.0
1916 85 47 0.00 0.0
1915 79 50 0.00 n/a
1914 71 45 0.00 0.0
1913 75 54 0.00 n/a
1912 81 n/a 0.00 n/a
1911 n/a 46 n/a n/a
1910 79 43 0.05 n/a
1909 n/a n/a n/a n/a
1908 88 50 0.00 n/a
1907 78 31 0.00 n/a
1906 91 50 0.00 n/a
1905 88 60 0.00 n/a
1904 74 38 0.00 0.0
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 84 54 0.00 n/a
1898 78 54 0.05 n/a
1897 86 52 0.00 n/a
1896 94 50 0.00 n/a
1895 68 47 0.00 n/a
1894 74 47 n/a n/a
What's the all-time high for Kennewick on 9/21?
For the date of Sep 21, the highest temperature ever reached in Kennewick history is 94 °F which has happened 3 times, most recently in 1967.
Highest Temperatures in Kennewick on September 21
Rank Temperature Year
1 94 °F 1939
1 94 °F 1967
1 94 °F 1896
4 91 °F 1906
4 91 °F 1979
6 90 °F 1938
6 90 °F 1936
6 90 °F 1994
9 89 °F 2014
10 88 °F 1908
10 88 °F 1942
10 88 °F 1905
10 88 °F 1943
What's the all-time low for Kennewick on 9/21?
For the date of Sep 21, the lowest temperature ever reached in Kennewick history is 31 °F which happened in 1907.
Lowest Temperatures in Kennewick on September 21
Rank Temperature Year
1 31 °F 1907
2 35 °F 1932
3 36 °F 2007
3 36 °F 2009
3 36 °F 1941
6 37 °F 2017
6 37 °F 1949
6 37 °F 2005
6 37 °F 2004
10 38 °F 1971
10 38 °F 1904
Lowest High Temperatures in Kennewick on September 21
Rank Temperature Year
1 58 °F 2000
2 59 °F 2023
3 62 °F 1945
4 65 °F 2017
4 65 °F 1968
4 65 °F 1929
7 66 °F 1996
7 66 °F 1923
7 66 °F 1920
10 67 °F 1926
10 67 °F 1961
What's the most it has ever rained in Kennewick on 9/21?
For the date of Sep 21, the most precipitation ever recorded in Kennewick history is 0.15 inches which happened in 1972.
All-Time Most Precipitation in Kennewick on September 21
Rank Precipitation Year
1 0.15 inches 1972
2 0.05 inches 1955
2 0.05 inches 1910
2 0.05 inches 1898
5 0.03 inches 2000
6 0.02 inches 1944
7 0.01 inches 1923
7 0.01 inches 2013
7 0.01 inches 2023
7 0.01 inches 1945
7 0.01 inches 1977
Weather Station Details
Years Station Coordinates
1999–2024 Pasco Tri Cities Airport location
1894–1998 Kennewick location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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