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
1911–2024
Highest temperature 94 °F 1958
Lowest temperature 32 °F 1911
Lowest daily high 49 °F 1962
Highest daily low 62 °F 1925
Most precipitation 0.80 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)
2023 92 60 0.00 0.0
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 0.33 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
1939 75 40 0.00 0.0
1938 66 40 0.00 0.0
1937 74 39 0.00 0.0
1936 64 36 0.00 0.0
1935 84 44 0.00 0.0
1934 76 42 0.00 n/a
1933 74 39 0.00 0.0
1932 77 57 0.00 n/a
1931 68 36 n/a n/a
1930 85 56 0.05 n/a
1929 89 41 0.00 0.0
1928 88 50 0.00 n/a
1927 56 42 0.01 0.0
1926 77 52 0.00 0.0
1925 77 62 0.00 0.0
1924 84 48 0.00 0.0
1923 70 46 0.00 0.0
1922 65 43 0.03 0.0
1921 67 49 0.14 0.0
1920 n/a 38 0.00 0.0
1919 87 48 0.00 0.0
1918 67 38 0.00 0.0
1917 68 41 0.00 0.0
1916 65 42 0.00 0.0
1915 66 40 0.00 0.0
1914 84 52 0.00 0.0
1913 70 44 0.00 0.0
1912 67 48 0.65 0.0
1911 65 32 0.00 0.0
What's the all-time high for Boise on 5/20?
For the date of May 20, the highest temperature ever reached in Boise history is 94 °F which happened in 1958.
Highest Temperatures in Boise on May 20
Rank Temperature Year
1 94 °F 1958
2 92 °F 2023
3 91 °F 1954
4 89 °F 1929
5 88 °F 1928
5 88 °F 1980
5 88 °F 2008
8 87 °F 1919
9 86 °F 1963
10 85 °F 1930
What's the all-time low for Boise on 5/20?
For the date of May 20, the lowest temperature ever reached in Boise history is 32 °F which happened in 1911.
Lowest Temperatures in Boise on May 20
Rank Temperature Year
1 32 °F 1911
2 33 °F 1971
3 34 °F 1976
3 34 °F 1982
5 35 °F 1941
6 36 °F 1944
6 36 °F 1931
6 36 °F 1936
9 37 °F 1953
10 38 °F 1960
10 38 °F 1920
10 38 °F 1918
10 38 °F 2022
10 38 °F 1975
10 38 °F 1987
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 56 °F 1927
6 57 °F 1953
7 58 °F 1957
8 60 °F 2010
9 61 °F 2002
9 61 °F 1952
What's the most it has ever rained in Boise on 5/20?
For the date of May 20, the most precipitation ever recorded in Boise history is 0.80 inches which happened in 2020.
All-Time Most Precipitation in Boise on May 20
Rank Precipitation Year
1 0.80 inches 2020
2 0.65 inches 1912
3 0.56 inches 1985
4 0.39 inches 2019
5 0.33 inches 2008
6 0.29 inches 2006
7 0.28 inches 1981
8 0.27 inches 1968
9 0.22 inches 1990
10 0.20 inches 2018
Weather Station Details
Years Station Coordinates
1940–2024 location
1911–1939 Meridian 1 W location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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