Idaho Falls May 21 Weather Records

Daily averages and all-time records for weather in Idaho Falls, Idaho for the date of May 21.
May 21 All-Time Records
1948–2024
Highest temperature 88 °F 2012
Lowest temperature 27 °F 2001
Lowest daily high 49 °F 2002
Highest daily low 57 °F 1958
Most precipitation 0.78 inches 1949
May 21 Average Weather
1991–2020 1
Average high 69.3 °F
Average low 40.2 °F
Chance precipitation 29.4%
Idaho Falls May 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 86 43 0.00 n/a
2022 62 30 0.00 n/a
2021 53 39 0.42 n/a
2020 60 40 0.13 n/a
2019 56 36 0.74 n/a
2018 74 44 0.00 n/a
2017 71 37 0.00 n/a
2016 53 44 0.43 n/a
2015 68 46 0.00 n/a
2014 76 41 0.00 n/a
2013 74 40 0.00 n/a
2012 88 43 0.00 n/a
2011 65 47 0.00 n/a
2010 63 32 0.00 n/a
2009 73 33 0.00 n/a
2008 51 42 0.03 n/a
2007 57 33 0.00 n/a
2006 82 49 0.00 n/a
2005 63 43 0.00 n/a
2004 66 35 0.00 n/a
2003 75 41 0.00 n/a
2002 49 35 0.72 n/a
2001 66 27 0.00 n/a
2000 76 43 0.00 n/a
1999 77 44 0.31 n/a
1998 60 42 0.44 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 62 51 0.41 0.0
1992 63 48 0.00 0.0
1991 76 43 0.00 0.0
1990 70 41 0.00 0.0
1989 75 37 0.00 0.0
1988 76 37 0.00 0.0
1987 60 39 0.16 0.0
1986 63 39 0.14 0.0
1985 73 44 0.00 0.0
1984 64 46 0.00 0.0
1983 69 40 0.00 0.0
1982 72 35 0.00 0.0
1981 53 43 0.54 0.0
1980 82 44 0.00 0.0
1979 81 50 0.00 0.0
1978 77 41 0.00 0.0
1977 68 34 0.00 0.0
1976 73 33 0.00 0.0
1975 49 38 0.21 0.0
1974 54 37 0.04 0.0
1973 62 36 0.00 0.0
1972 55 39 0.02 0.0
1971 68 40 0.00 0.0
1970 55 42 0.60 0.0
1969 67 34 0.00 0.0
1968 52 45 0.75 0.0
1967 81 38 0.00 0.0
1966 78 42 0.00 0.0
1965 58 44 0.00 0.0
1964 75 47 0.00 0.0
1963 74 42 0.00 0.0
1962 61 40 0.01 0.0
1961 73 40 0.00 0.0
1960 62 32 0.00 0.0
1959 66 31 0.00 0.0
1958 84 57 0.00 0.0
1957 50 37 0.23 0.0
1956 83 48 0.00 0.0
1955 74 48 0.00 0.0
1954 69 44 0.50 0.0
1953 54 34 0.36 0.0
1952 53 41 0.34 0.0
1951 75 46 0.00 0.0
1950 75 39 0.00 0.0
1949 59 43 0.78 0.0
What's the all-time high for Idaho Falls on 5/21?
For the date of May 21, the highest temperature ever reached in Idaho Falls history is 88 °F which happened in 2012.
Highest Temperatures in Idaho Falls on May 21
Rank Temperature Year
1 88 °F 2012
2 86 °F 2023
3 84 °F 1958
4 83 °F 1956
5 82 °F 2006
5 82 °F 1980
7 81 °F 1967
7 81 °F 1979
9 78 °F 1966
10 77 °F 1978
10 77 °F 1999
What's the all-time low for Idaho Falls on 5/21?
For the date of May 21, the lowest temperature ever reached in Idaho Falls history is 27 °F which happened in 2001.
Lowest Temperatures in Idaho Falls on May 21
Rank Temperature Year
1 27 °F 2001
2 30 °F 2022
3 31 °F 1959
4 32 °F 2010
4 32 °F 1960
6 33 °F 1976
6 33 °F 2007
6 33 °F 2009
9 34 °F 1977
9 34 °F 1969
9 34 °F 1953
Lowest High Temperatures in Idaho Falls on May 21
Rank Temperature Year
1 49 °F 1975
1 49 °F 2002
3 50 °F 1957
4 51 °F 2008
5 52 °F 1968
6 53 °F 1981
6 53 °F 2016
6 53 °F 1952
6 53 °F 2021
10 54 °F 1974
10 54 °F 1953
What's the most it has ever rained in Idaho Falls on 5/21?
For the date of May 21, the most precipitation ever recorded in Idaho Falls history is 0.78 inches which happened in 1949.
All-Time Most Precipitation in Idaho Falls on May 21
Rank Precipitation Year
1 0.78 inches 1949
2 0.75 inches 1968
3 0.74 inches 2019
4 0.72 inches 2002
5 0.60 inches 1970
6 0.54 inches 1981
7 0.50 inches 1954
8 0.44 inches 1998
9 0.43 inches 2016
10 0.42 inches 2021
Weather Station Details
Years Station Coordinates
1948–2024 Idaho Falls Fanning Field location