Basel September 21 Weather Records

Daily averages and all-time records for weather in Basel, Switzerland for the date of September 21.
September 21 All-Time Records
1901–2024
Highest temperature 29.2 °C 1987
Lowest temperature 1.4 °C 1952
Lowest daily high 11.0 °C 1904
Highest daily low 15.8 °C 1936
Most precipitation 3.31 cm 1968
September 21 Average Weather
1991–2020 1
Average high 19.9 °C
Average low 10.5 °C
Chance precipitation 43.3%
Basel September 21 Weather by Year
Year High (°C) Low (°C) Precip. (cm)
2023 24.9 14.0 0.64
2022 18.0 5.3 0.00
2021 18.8 9.0 0.00
2020 24.9 13.0 0.00
2019 24.5 8.0 0.00
2018 27.6 11.2 0.04
2017 19.4 4.5 0.00
2016 18.9 10.7 0.00
2015 20.1 6.9 0.00
2014 21.3 13.7 1.19
2013 19.3 7.8 0.00
2012 23.1 7.1 1.08
2011 21.0 7.2 0.00
2010 23.3 9.1 0.00
2009 21.2 14.9 0.00
2008 16.2 4.0 0.00
2007 22.0 7.8 0.00
2006 25.7 12.9 0.00
2005 18.8 5.0 0.00
2004 18.6 11.4 0.00
2003 27.9 12.3 0.00
2002 18.1 12.2 0.00
2001 17.0 10.1 0.10
2000 18.1 9.8 0.00
1999 21.1 12.0 0.08
1998 19.7 6.7 0.00
1997 20.3 7.8 0.00
1996 13.8 9.3 0.00
1995 12.9 10.2 0.04
1994 16.6 10.8 0.02
1993 23.5 15.2 0.00
1992 24.9 12.4 0.00
1991 25.1 13.3 0.00
1990 18.7 12.1 0.02
1989 26.3 13.0 0.00
1988 20.1 9.2 0.00
1987 29.2 15.6 0.00
1986 19.9 9.4 0.00
1985 26.9 14.3 0.00
1984 18.8 9.0 0.50
1983 21.6 8.7 0.01
1982 25.2 14.8 0.19
1981 22.4 15.3 0.00
1980 21.1 14.4 0.05
1979 n/a n/a 0.60
1978 16.8 3.1 0.00
1977 12.8 5.0 0.00
1976 19.3 5.6 0.00
1975 20.6 13.5 0.00
1974 20.0 7.7 0.00
1973 17.6 12.5 0.37
1972 16.7 5.7 0.00
1971 23.5 7.5 0.00
1970 23.8 9.4 0.00
1969 19.3 7.9 0.00
1968 18.0 12.0 3.31
1967 26.6 11.2 0.19
1966 23.4 8.3 0.00
1965 18.2 4.6 0.00
1964 15.3 8.0 0.32
1963 22.9 14.3 0.49
1962 17.0 6.2 0.00
1961 26.5 13.5 0.00
1960 11.6 5.9 0.01
1959 27.7 7.1 0.00
1958 19.1 14.2 2.97
1957 25.9 12.2 1.47
1956 26.2 10.7 0.00
1955 25.4 11.5 0.00
1954 14.7 9.2 0.25
1953 21.5 8.0 1.26
1952 17.1 1.4 0.02
1951 18.8 4.4 0.00
1950 15.3 6.7 0.51
1949 24.0 13.0 1.29
1948 17.2 8.2 0.00
1947 24.4 14.7 0.25
1946 17.7 8.4 0.00
1945 27.9 9.8 0.00
1944 19.8 11.3 0.00
1943 17.1 10.8 0.20
1942 26.8 13.9 2.02
1941 23.7 3.8 0.00
1940 25.1 14.8 0.35
1939 18.1 10.6 0.00
1938 25.1 11.0 0.00
1937 13.0 6.3 0.07
1936 22.0 15.8 2.15
1935 27.0 12.8 0.00
1934 20.8 10.7 0.00
1933 17.0 12.6 1.14
1932 18.1 11.2 0.07
1931 14.2 6.4 0.20
1930 18.6 9.5 0.20
1929 18.9 8.0 0.00
1928 18.1 11.4 0.00
1927 26.2 13.1 0.00
1926 25.6 13.1 0.00
1925 17.1 12.6 1.05
1924 23.5 14.5 0.00
1923 17.6 9.0 1.34
1922 22.1 11.9 0.00
1921 22.8 15.0 2.90
1920 17.4 12.0 0.70
1919 12.0 5.7 0.16
1918 17.5 5.9 0.00
1917 20.5 14.5 0.00
1916 12.0 5.7 0.03
1915 17.8 5.5 0.00
1914 11.2 5.8 0.36
1913 17.0 9.9 0.08
1912 14.6 1.7 0.00
1911 18.0 10.5 0.50
1910 12.9 7.1 0.00
1909 20.5 8.1 0.02
1908 20.0 11.7 0.07
1907 19.5 9.0 0.00
1906 16.0 9.7 0.30
1905 13.0 11.0 0.10
1904 11.0 3.5 0.00
1903 18.0 6.5 0.00
1902 18.5 8.0 0.00
1901 23.5 12.0 0.00
What's the all-time high for Basel on 9/21?
For the date of Sep 21, the highest temperature ever reached in Basel history is 29.2 °C which happened in 1987.
Highest Temperatures in Basel on September 21
Rank Temperature Year
1 29.2 °C 1987
2 27.9 °C 1945
2 27.9 °C 2003
4 27.7 °C 1959
5 27.6 °C 2018
6 27.0 °C 1935
7 26.9 °C 1985
8 26.8 °C 1942
9 26.6 °C 1967
10 26.5 °C 1961
What's the all-time low for Basel on 9/21?
For the date of Sep 21, the lowest temperature ever reached in Basel history is 1.4 °C which happened in 1952.
Lowest Temperatures in Basel on September 21
Rank Temperature Year
1 1.4 °C 1952
2 1.7 °C 1912
3 3.1 °C 1978
4 3.5 °C 1904
5 3.8 °C 1941
6 4.0 °C 2008
7 4.4 °C 1951
8 4.5 °C 2017
9 4.6 °C 1965
10 5.0 °C 2005
10 5.0 °C 1977
Lowest High Temperatures in Basel on September 21
Rank Temperature Year
1 11.0 °C 1904
2 11.2 °C 1914
3 11.6 °C 1960
4 12.0 °C 1919
4 12.0 °C 1916
6 12.8 °C 1977
7 12.9 °C 1995
7 12.9 °C 1910
9 13.0 °C 1905
9 13.0 °C 1937
What's the most it has ever rained in Basel on 9/21?
For the date of Sep 21, the most precipitation ever recorded in Basel history is 3.31 cm which happened in 1968.
All-Time Most Precipitation in Basel on September 21
Rank Precipitation Year
1 3.31 cm 1968
2 2.97 cm 1958
3 2.90 cm 1921
4 2.15 cm 1936
5 2.02 cm 1942
6 1.47 cm 1957
7 1.34 cm 1923
8 1.29 cm 1949
9 1.26 cm 1953
10 1.19 cm 2014
Weather Station Details
Years Station Coordinates
1901–2024 Basel Binningen location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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