Idaho Falls August 21 Weather Records

Daily averages and all-time records for weather in Idaho Falls, Idaho for the date of August 21.
August 21 All-Time Records
1948–2024
Highest temperature 96 °F 2009
Lowest temperature 35 °F 1964
Lowest daily high 58 °F 1968
Highest daily low 62 °F 2023
Most precipitation 0.43 inches 1968
August 21 Average Weather
1991–2020 1
Average high 84.5 °F
Average low 46.8 °F
Chance precipitation 14.3%
Idaho Falls August 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 87 62 0.02 n/a
2022 90 56 0.03 n/a
2021 72 45 0.22 n/a
2020 88 45 0.00 n/a
2019 94 43 0.00 n/a
2018 78 40 0.00 n/a
2017 83 49 0.00 n/a
2016 91 44 0.00 n/a
2015 87 49 0.00 n/a
2014 75 55 0.32 n/a
2013 n/a n/a n/a n/a
2012 89 48 0.00 n/a
2011 93 54 0.02 n/a
2010 94 50 0.00 n/a
2009 96 49 0.00 n/a
2008 79 53 0.00 n/a
2007 80 56 0.00 n/a
2006 92 44 0.00 n/a
2005 90 45 0.00 n/a
2004 84 48 0.00 n/a
2003 85 54 0.10 n/a
2002 75 46 0.00 n/a
2001 84 48 0.00 n/a
2000 81 43 0.00 n/a
1999 87 50 0.32 n/a
1998 87 46 0.13 n/a
1997 n/a n/a n/a n/a
1996 n/a n/a n/a n/a
1995 n/a n/a n/a n/a
1994 n/a n/a n/a n/a
1993 68 53 0.29 0.0
1992 89 53 0.00 0.0
1991 93 50 0.00 0.0
1990 79 43 0.00 0.0
1989 79 42 0.00 0.0
1988 77 43 0.00 0.0
1987 84 58 0.00 0.0
1986 80 49 0.07 0.0
1985 80 50 0.00 0.0
1984 83 45 0.00 0.0
1983 78 49 0.08 0.0
1982 95 50 0.00 0.0
1981 83 55 0.06 0.0
1980 81 41 0.00 0.0
1979 76 44 0.01 0.0
1978 87 46 0.00 0.0
1977 88 55 0.24 0.0
1976 92 45 0.00 0.0
1975 78 50 0.00 0.0
1974 76 36 0.00 0.0
1973 79 54 0.09 0.0
1972 84 51 0.01 0.0
1971 91 51 0.00 0.0
1970 86 58 0.00 0.0
1969 95 49 0.00 0.0
1968 58 49 0.43 0.0
1967 82 48 0.00 0.0
1966 72 38 0.00 0.0
1965 71 49 0.17 0.0
1964 73 35 0.00 0.0
1963 82 49 0.00 0.0
1962 91 51 0.00 0.0
1961 86 55 0.00 0.0
1960 92 50 0.00 0.0
1959 79 46 0.00 0.0
1958 88 53 0.04 0.0
1957 82 52 0.00 0.0
1956 89 48 0.00 0.0
1955 88 51 0.00 0.0
1954 60 43 0.08 0.0
1953 92 55 0.00 0.0
1952 89 47 0.00 0.0
1951 85 56 0.14 0.0
1950 87 46 0.00 0.0
1949 89 48 0.00 0.0
1948 87 42 0.00 0.0
What's the all-time high for Idaho Falls on 8/21?
For the date of Aug 21, the highest temperature ever reached in Idaho Falls history is 96 °F which happened in 2009.
Highest Temperatures in Idaho Falls on August 21
Rank Temperature Year
1 96 °F 2009
2 95 °F 1969
2 95 °F 1982
4 94 °F 2019
4 94 °F 2010
6 93 °F 2011
6 93 °F 1991
8 92 °F 2006
8 92 °F 1953
8 92 °F 1976
8 92 °F 1960
What's the all-time low for Idaho Falls on 8/21?
For the date of Aug 21, the lowest temperature ever reached in Idaho Falls history is 35 °F which happened in 1964.
Lowest Temperatures in Idaho Falls on August 21
Rank Temperature Year
1 35 °F 1964
2 36 °F 1974
3 38 °F 1966
4 40 °F 2018
5 41 °F 1980
6 42 °F 1989
6 42 °F 1948
8 43 °F 1954
8 43 °F 2000
8 43 °F 1988
8 43 °F 2019
8 43 °F 1990
Lowest High Temperatures in Idaho Falls on August 21
Rank Temperature Year
1 58 °F 1968
2 60 °F 1954
3 68 °F 1993
4 71 °F 1965
5 72 °F 1966
5 72 °F 2021
7 73 °F 1964
8 75 °F 2002
8 75 °F 2014
10 76 °F 1979
10 76 °F 1974
What's the most it has ever rained in Idaho Falls on 8/21?
For the date of Aug 21, the most precipitation ever recorded in Idaho Falls history is 0.43 inches which happened in 1968.
All-Time Most Precipitation in Idaho Falls on August 21
Rank Precipitation Year
1 0.43 inches 1968
2 0.32 inches 2014
2 0.32 inches 1999
4 0.29 inches 1993
5 0.24 inches 1977
6 0.22 inches 2021
7 0.17 inches 1965
8 0.14 inches 1951
9 0.13 inches 1998
10 0.10 inches 2003
Weather Station Details
Years Station Coordinates
1948–2024 Idaho Falls Fanning Field location