Boise May 20 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of May 20.
May 20 All-Time Records
1940–2022
Highest temperature 94 °F 1958
Lowest temperature 33 °F 1971
Lowest daily high 49 °F 1962
Highest daily low 59 °F 2006
Most precipitation 0.8 inches 2020
Most snow none -
May 20 Average Weather
1991–2020 1
Average high 73.7 °F
Average low 48.3 °F
Chance precipitation 27.5%
Chance snow 0%
Boise May 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 65 38 0.00 0.0
2021 63 40 0.00 0.0
2020 51 45 0.80 0.0
2019 62 48 0.39 0.0
2018 72 56 0.20 0.0
2017 77 52 0.00 0.0
2016 55 45 0.08 0.0
2015 70 54 0.09 0.0
2014 75 42 0.00 0.0
2013 74 43 0.00 0.0
2012 84 56 0.00 0.0
2011 76 49 0.00 0.0
2010 60 43 0.07 0.0
2009 68 45 0.00 0.0
2008 88 48 0.29 0.0
2007 71 52 0.03 0.0
2006 78 59 0.29 0.0
2005 68 49 0.07 0.0
2004 70 45 0.07 0.0
2003 74 43 0.00 0.0
2002 61 44 0.00 0.0
2001 67 45 0.00 0.0
2000 79 49 0.00 0.0
1999 78 53 0.04 0.0
1998 71 46 0.00 0.0
1997 83 52 0.00 0.0
1996 64 39 0.00 0.0
1995 80 43 0.00 0.0
1994 63 49 0.07 0.0
1993 83 59 0.04 0.0
1992 69 51 0.00 0.0
1991 66 44 0.00 0.0
1990 65 48 0.22 0.0
1989 75 42 0.00 0.0
1988 80 40 0.00 0.0
1987 65 38 0.00 0.0
1986 80 54 0.05 0.0
1985 70 47 0.56 0.0
1984 70 47 0.00 0.0
1983 73 40 0.00 0.0
1982 74 34 0.00 0.0
1981 65 48 0.28 0.0
1980 88 53 0.00 0.0
1979 80 40 0.00 0.0
1978 78 45 0.00 0.0
1977 70 40 0.00 0.0
1976 66 34 0.00 0.0
1975 66 38 0.00 0.0
1974 63 45 0.00 0.0
1973 67 48 0.01 0.0
1972 75 51 0.07 0.0
1971 54 33 0.00 0.0
1970 67 48 0.00 0.0
1969 64 39 0.00 0.0
1968 75 57 0.27 0.0
1967 82 47 0.00 0.0
1966 84 49 0.00 0.0
1965 65 50 0.00 0.0
1964 82 55 0.00 0.0
1963 86 53 0.00 0.0
1962 49 40 0.03 0.0
1961 82 53 0.00 0.0
1960 72 38 0.10 0.0
1959 66 40 0.00 0.0
1958 94 57 0.00 0.0
1957 58 43 0.00 0.0
1956 84 53 0.00 0.0
1955 83 50 0.00 0.0
1954 91 58 0.00 0.0
1953 57 37 0.00 0.0
1952 61 43 0.17 0.0
1951 72 45 0.00 0.0
1950 74 42 0.00 0.0
1949 63 46 0.03 0.0
1948 72 41 0.00 0.0
1947 76 41 0.00 0.0
1946 79 49 0.00 0.0
1945 63 40 0.10 0.0
1944 69 36 0.00 0.0
1943 77 45 0.00 0.0
1942 80 50 0.00 0.0
1941 73 35 0.00 0.0
1940 75 45 0.00 0.0
All-Time Highest Temperatures in Boise on May 20
Rank Temperature Year
1 94 °F 1958
2 91 °F 1954
3 88 °F 2008
3 88 °F 1980
5 86 °F 1963
6 84 °F 1966
6 84 °F 1956
6 84 °F 2012
9 83 °F 1997
9 83 °F 1955
9 83 °F 1993
All-Time Lowest Temperatures in Boise on May 20
Rank Temperature Year
1 33 °F 1971
2 34 °F 1976
2 34 °F 1982
4 35 °F 1941
5 36 °F 1944
6 37 °F 1953
7 38 °F 1975
7 38 °F 1987
7 38 °F 2022
7 38 °F 1960
Lowest High Temperatures in Boise on May 20
Rank Temperature Year
1 49 °F 1962
2 51 °F 2020
3 54 °F 1971
4 55 °F 2016
5 57 °F 1953
6 58 °F 1957
7 60 °F 2010
8 61 °F 2002
8 61 °F 1952
10 62 °F 2019
All-Time Most Precipitation in Boise on May 20
Rank Precipitation Year
1 0.8 inches 2020
2 0.6 inches 1985
3 0.4 inches 2019
4 0.3 inches 2006
4 0.3 inches 2008
6 0.3 inches 1981
7 0.3 inches 1968
8 0.2 inches 1990
9 0.2 inches 2018
10 0.2 inches 1952
Weather Station Details
Years Station Coordinates
1940–2022 location