Idaho Falls May 20 Weather Records

Daily averages and all-time records for weather in Idaho Falls, Idaho for the date of May 20.
May 20 All-Time Records
1948–2024
Highest temperature 87 °F 2008
Lowest temperature 24 °F 2003
Lowest daily high 45 °F 1974
Highest daily low 60 °F 1954
Most precipitation 0.68 inches 1974
May 20 Average Weather
1991–2020 1
Average high 68.9 °F
Average low 40.0 °F
Chance precipitation 30.0%
Idaho Falls May 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 84 42 0.00 n/a
2022 58 33 0.00 n/a
2021 61 39 0.02 n/a
2020 57 40 0.18 n/a
2019 52 39 0.38 n/a
2018 75 40 0.20 n/a
2017 67 32 0.00 n/a
2016 65 44 0.14 n/a
2015 59 47 0.32 n/a
2014 72 36 0.00 n/a
2013 69 47 0.02 n/a
2012 77 39 0.00 n/a
2011 62 46 0.02 n/a
2010 58 36 0.07 n/a
2009 68 48 0.00 n/a
2008 87 40 0.00 n/a
2007 75 47 0.00 n/a
2006 77 50 0.00 n/a
2005 74 46 0.05 n/a
2004 70 36 0.01 n/a
2003 66 24 0.00 n/a
2002 81 49 0.00 n/a
2001 60 33 0.00 n/a
2000 69 35 0.00 n/a
1999 74 38 0.00 n/a
1998 78 43 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 82 47 0.02 0.0
1992 69 51 0.00 0.0
1991 70 42 0.00 0.0
1990 60 41 0.03 0.0
1989 70 31 0.00 0.0
1988 70 32 0.00 0.0
1987 58 42 0.01 0.0
1986 81 49 0.00 0.0
1985 69 49 0.06 0.0
1984 71 53 0.00 0.0
1983 65 35 0.00 0.0
1982 62 34 0.00 0.0
1981 56 45 0.57 0.0
1980 77 45 0.00 0.0
1979 78 40 0.00 0.0
1978 71 37 0.00 0.0
1977 56 32 0.02 0.0
1976 66 43 0.00 0.0
1975 48 32 0.00 0.0
1974 45 34 0.68 0.0
1973 71 46 0.00 0.0
1972 73 45 0.03 0.0
1971 53 35 0.00 0.0
1970 74 44 0.00 0.0
1969 65 43 0.00 0.0
1968 66 47 0.11 0.0
1967 74 35 0.00 0.0
1966 79 38 0.00 0.0
1965 64 50 0.00 0.0
1964 83 45 0.00 0.0
1963 72 40 0.00 0.0
1962 55 40 0.04 0.0
1961 70 40 0.03 0.0
1960 69 33 0.00 0.0
1959 53 31 0.07 0.0
1958 87 48 0.00 0.0
1957 50 38 0.16 0.0
1956 82 46 0.00 0.0
1955 80 40 0.00 0.0
1954 86 60 0.00 0.0
1953 55 39 0.00 0.0
1952 66 43 0.09 0.0
1951 70 47 0.00 0.0
1950 68 25 0.00 0.0
1949 58 42 0.05 0.0
What's the all-time high for Idaho Falls on 5/20?
For the date of May 20, the highest temperature ever reached in Idaho Falls history is 87 °F which has happened 2 times, most recently in 2008.
Highest Temperatures in Idaho Falls on May 20
Rank Temperature Year
1 87 °F 2008
1 87 °F 1958
3 86 °F 1954
4 84 °F 2023
5 83 °F 1964
6 82 °F 1993
6 82 °F 1956
8 81 °F 1986
8 81 °F 2002
10 80 °F 1955
What's the all-time low for Idaho Falls on 5/20?
For the date of May 20, the lowest temperature ever reached in Idaho Falls history is 24 °F which happened in 2003.
Lowest Temperatures in Idaho Falls on May 20
Rank Temperature Year
1 24 °F 2003
2 25 °F 1950
3 31 °F 1989
3 31 °F 1959
5 32 °F 1977
5 32 °F 2017
5 32 °F 1975
5 32 °F 1988
9 33 °F 1960
9 33 °F 2001
9 33 °F 2022
Lowest High Temperatures in Idaho Falls on May 20
Rank Temperature Year
1 45 °F 1974
2 48 °F 1975
3 50 °F 1957
4 52 °F 2019
5 53 °F 1959
5 53 °F 1971
7 55 °F 1953
7 55 °F 1962
9 56 °F 1977
9 56 °F 1981
What's the most it has ever rained in Idaho Falls on 5/20?
For the date of May 20, the most precipitation ever recorded in Idaho Falls history is 0.68 inches which happened in 1974.
All-Time Most Precipitation in Idaho Falls on May 20
Rank Precipitation Year
1 0.68 inches 1974
2 0.57 inches 1981
3 0.38 inches 2019
4 0.32 inches 2015
5 0.20 inches 2018
6 0.18 inches 2020
7 0.16 inches 1957
8 0.14 inches 2016
9 0.11 inches 1968
10 0.09 inches 1952
Weather Station Details
Years Station Coordinates
1948–2024 Idaho Falls Fanning Field location