Idaho Falls October 21 Weather Records

Daily averages and all-time records for weather in Idaho Falls, Idaho for the date of October 21.
October 21 All-Time Records
1948–2024
Highest temperature 77 °F 2003
Lowest temperature 19 °F 1999
Lowest daily high 37 °F 1949
Highest daily low 42 °F 2014
Most precipitation 0.80 inches 1961
October 21 Average Weather
1991–2020 1
Average high 57.0 °F
Average low 29.2 °F
Chance precipitation 19.3%
Idaho Falls October 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 71 38 0.00 n/a
2022 69 39 0.00 n/a
2021 67 35 0.00 n/a
2020 58 29 0.00 n/a
2019 53 33 0.00 n/a
2018 69 29 0.00 n/a
2017 44 31 0.04 n/a
2016 62 28 0.00 n/a
2015 61 34 0.00 n/a
2014 63 42 0.01 n/a
2013 n/a n/a n/a n/a
2012 53 33 0.00 n/a
2011 65 39 0.00 n/a
2010 69 28 0.00 n/a
2009 54 27 0.00 n/a
2008 50 22 0.00 n/a
2007 45 28 0.00 n/a
2006 49 22 0.00 n/a
2005 60 26 0.00 n/a
2004 50 33 0.00 n/a
2003 77 36 0.00 n/a
2002 63 23 0.00 n/a
2001 59 21 0.00 n/a
2000 51 33 0.08 n/a
1999 65 19 0.00 n/a
1998 70 24 0.00 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 60 27 0.00 0.0
1992 74 32 0.00 0.0
1991 66 28 0.00 0.0
1990 54 19 0.00 0.0
1989 66 35 0.00 0.0
1988 67 29 0.00 0.0
1987 64 20 0.00 0.0
1986 54 41 0.00 0.0
1985 63 36 0.26 0.0
1984 42 20 0.00 0.0
1983 68 32 0.00 0.0
1982 60 20 0.00 0.0
1981 49 27 0.00 0.0
1980 58 30 0.00 0.0
1979 40 21 0.00 0.0
1978 67 31 0.00 0.0
1977 63 30 0.00 0.0
1976 62 19 0.00 0.0
1975 68 41 0.00 0.0
1974 45 31 0.49 0.0
1973 68 31 0.00 0.0
1972 52 41 0.00 0.0
1971 48 30 0.00 0.0
1970 53 35 0.00 0.0
1969 63 27 0.00 0.0
1968 51 29 0.00 0.0
1967 70 26 0.00 0.0
1966 49 29 0.00 0.0
1965 63 26 0.00 0.0
1964 65 26 0.00 0.0
1963 61 33 0.00 0.0
1962 65 31 0.00 0.0
1961 51 31 0.80 1.0
1960 62 40 0.00 0.0
1959 53 29 0.00 0.0
1958 54 20 0.00 0.0
1957 57 29 0.00 0.0
1956 63 30 0.00 0.0
1955 59 36 0.00 0.0
1954 66 24 0.00 0.0
1953 43 32 0.03 0.0
1952 68 32 0.00 0.0
1951 39 28 0.01 0.0
1950 68 34 0.00 0.0
1949 37 22 0.00 0.1
1948 65 25 0.00 0.0
What's the all-time high for Idaho Falls on 10/21?
For the date of Oct 21, the highest temperature ever reached in Idaho Falls history is 77 °F which happened in 2003.
Highest Temperatures in Idaho Falls on October 21
Rank Temperature Year
1 77 °F 2003
2 74 °F 1992
3 71 °F 2023
4 70 °F 1998
4 70 °F 1967
6 69 °F 2022
6 69 °F 2010
6 69 °F 2018
9 68 °F 1973
9 68 °F 1950
9 68 °F 1975
9 68 °F 1952
9 68 °F 1983
What's the all-time low for Idaho Falls on 10/21?
For the date of Oct 21, the lowest temperature ever reached in Idaho Falls history is 19 °F which has happened 3 times, most recently in 1999.
Lowest Temperatures in Idaho Falls on October 21
Rank Temperature Year
1 19 °F 1976
1 19 °F 1999
1 19 °F 1990
4 20 °F 1958
4 20 °F 1984
4 20 °F 1982
4 20 °F 1987
8 21 °F 2001
8 21 °F 1979
10 22 °F 1949
10 22 °F 2006
10 22 °F 2008
Lowest High Temperatures in Idaho Falls on October 21
Rank Temperature Year
1 37 °F 1949
2 39 °F 1951
3 40 °F 1979
4 42 °F 1984
5 43 °F 1953
6 44 °F 2017
7 45 °F 1974
7 45 °F 2007
9 48 °F 1971
10 49 °F 1966
10 49 °F 2006
10 49 °F 1981
What's the most it has ever rained in Idaho Falls on 10/21?
For the date of Oct 21, the most precipitation ever recorded in Idaho Falls history is 0.80 inches which happened in 1961.
All-Time Most Precipitation in Idaho Falls on October 21
Rank Precipitation Year
1 0.80 inches 1961
2 0.49 inches 1974
3 0.26 inches 1985
4 0.08 inches 2000
5 0.04 inches 2017
6 0.03 inches 1953
7 0.01 inches 1951
7 0.01 inches 2014
Weather Station Details
Years Station Coordinates
1948–2024 Idaho Falls Fanning Field location