Twin Falls September 21 Weather Records

Daily averages and all-time records for weather in Twin Falls, Idaho for the date of September 21.
September 21 All-Time Records
1925–2024
Highest temperature 90 °F 1939
Lowest temperature 25 °F 1983
Lowest daily high 46 °F 2017
Highest daily low 55 °F 2014
Most precipitation 0.42 inches 1984
September 21 Average Weather
1991–2020 1
Average high 74.6 °F
Average low 45.6 °F
Chance precipitation 14.6%
Twin Falls September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 63 39 0.00 n/a
2022 80 43 0.15 n/a
2021 72 32 0.00 n/a
2020 82 38 0.00 n/a
2019 66 42 0.00 n/a
2018 79 37 0.00 n/a
2017 46 39 0.25 n/a
2016 64 52 0.06 n/a
2015 82 51 0.00 n/a
2014 70 55 0.13 n/a
2013 80 53 0.00 n/a
2012 86 45 0.00 n/a
2011 80 50 0.00 n/a
2010 79 42 0.00 n/a
2009 68 41 0.00 n/a
2008 64 42 0.00 n/a
2007 77 48 0.00 n/a
2006 60 43 0.05 n/a
2005 71 50 0.02 n/a
2004 58 36 0.00 n/a
2003 77 51 0.00 n/a
2002 68 42 0.00 n/a
2001 81 48 0.00 n/a
2000 66 43 0.00 n/a
1999 86 45 0.00 n/a
1998 62 45 0.00 n/a
1997 58 n/a 0.01 0.0
1996 69 n/a 0.00 0.0
1995 65 35 0.00 0.0
1994 78 46 0.00 0.0
1993 63 33 0.00 0.0
1992 74 46 0.00 0.0
1991 87 44 0.00 0.0
1990 74 42 0.00 0.0
1989 71 39 0.00 0.0
1988 51 39 0.02 0.0
1987 77 42 0.00 0.0
1986 57 30 0.00 0.0
1985 65 33 0.00 0.0
1984 76 41 0.42 0.0
1983 59 25 0.00 0.0
1982 72 43 0.18 0.0
1981 75 39 0.00 0.0
1980 65 42 0.04 0.0
1979 85 47 0.00 0.0
1978 60 32 0.00 0.0
1977 61 33 0.10 0.0
1976 80 43 0.00 0.0
1975 72 34 0.00 0.0
1974 81 48 0.00 0.0
1973 63 43 0.06 0.0
1972 65 38 0.00 0.0
1971 66 37 0.00 0.0
1970 62 38 0.10 0.0
1969 63 46 0.13 0.0
1968 54 36 0.13 0.0
1967 82 45 0.00 0.0
1966 85 50 0.00 0.0
1965 63 44 0.00 0.0
1964 61 37 0.12 0.0
1963 69 49 0.17 0.0
1962 82 48 0.22 0.0
1961 63 39 0.00 0.0
1960 73 44 0.00 0.0
1959 58 39 n/a 0.0
1958 66 32 0.00 0.0
1957 70 36 0.00 0.0
1956 76 41 0.00 0.0
1955 68 40 0.00 0.0
1954 76 36 0.00 0.0
1953 77 40 0.00 0.0
1952 85 49 0.00 0.0
1951 72 38 0.00 0.0
1950 75 36 0.00 0.0
1949 76 43 0.00 0.0
1948 76 41 0.00 0.0
1947 80 33 0.00 0.0
1946 67 34 0.00 0.0
1945 60 36 0.20 0.0
1944 75 44 0.00 0.0
1943 79 51 0.00 0.0
1942 75 44 0.00 0.0
1941 63 34 0.00 0.0
1940 68 37 0.00 0.0
1939 90 51 0.01 0.0
1938 89 45 0.00 0.0
1937 77 48 0.00 0.0
1936 88 50 0.00 0.0
1935 82 45 n/a n/a
1934 70 37 0.00 n/a
1933 70 42 0.00 n/a
1932 73 42 0.00 n/a
1931 62 34 0.00 n/a
1930 78 45 n/a n/a
1929 57 34 0.21 0.0
1928 80 37 0.00 0.0
1927 86 50 0.00 n/a
1926 79 39 0.00 n/a
1925 66 44 0.00 n/a
What's the all-time high for Twin Falls on 9/21?
For the date of Sep 21, the highest temperature ever reached in Twin Falls history is 90 °F which happened in 1939.
Highest Temperatures in Twin Falls on September 21
Rank Temperature Year
1 90 °F 1939
2 89 °F 1938
3 88 °F 1936
4 87 °F 1991
5 86 °F 1999
5 86 °F 2012
5 86 °F 1927
8 85 °F 1979
8 85 °F 1952
8 85 °F 1966
What's the all-time low for Twin Falls on 9/21?
For the date of Sep 21, the lowest temperature ever reached in Twin Falls history is 25 °F which happened in 1983.
Lowest Temperatures in Twin Falls on September 21
Rank Temperature Year
1 25 °F 1983
2 30 °F 1986
3 32 °F 2021
3 32 °F 1958
3 32 °F 1978
6 33 °F 1993
6 33 °F 1977
6 33 °F 1985
6 33 °F 1947
10 34 °F 1931
10 34 °F 1975
10 34 °F 1929
10 34 °F 1941
10 34 °F 1946
Lowest High Temperatures in Twin Falls on September 21
Rank Temperature Year
1 46 °F 2017
2 51 °F 1988
3 54 °F 1968
4 57 °F 1929
4 57 °F 1986
6 58 °F 1997
6 58 °F 1959
6 58 °F 2004
9 59 °F 1983
10 60 °F 1978
10 60 °F 2006
10 60 °F 1945
What's the most it has ever rained in Twin Falls on 9/21?
For the date of Sep 21, the most precipitation ever recorded in Twin Falls history is 0.42 inches which happened in 1984.
All-Time Most Precipitation in Twin Falls on September 21
Rank Precipitation Year
1 0.42 inches 1984
2 0.25 inches 2017
3 0.22 inches 1962
4 0.21 inches 1929
5 0.20 inches 1945
6 0.18 inches 1982
7 0.17 inches 1963
8 0.15 inches 2022
9 0.13 inches 1969
9 0.13 inches 1968
9 0.13 inches 2014
Weather Station Details
Years Station Coordinates
1998–2024 Magic Valley Regional Airport location
1977–1997 Twin Falls 6 E location
1925–1976 Twin Falls 3 SE location