Boise June 21 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of June 21.
June 21 All-Time Records
1911–2024
Highest temperature 102 °F 1955
Lowest temperature 34 °F 1916
Lowest daily high 59 °F 1916
Highest daily low 68 °F 2005
Most precipitation 0.30 inches 1967
Most snow none -
June 21 Average Weather
1991–2020 1
Average high 83.4 °F
Average low 54.8 °F
Chance precipitation 14.5%
Chance snow 0%
Boise June 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 73 43 0.00 0.0
2022 83 51 0.00 0.0
2021 96 64 0.00 0.0
2020 82 60 0.00 0.0
2019 67 44 0.00 0.0
2018 82 58 0.00 0.0
2017 86 62 0.00 0.0
2016 83 60 0.00 0.0
2015 90 63 0.00 0.0
2014 86 54 0.00 0.0
2013 70 51 0.00 0.0
2012 96 59 0.00 0.0
2011 88 56 0.00 0.0
2010 72 48 0.00 0.0
2009 66 51 0.00 0.0
2008 101 65 0.01 0.0
2007 96 64 0.00 0.0
2006 79 51 0.00 0.0
2005 101 68 0.00 0.0
2004 86 56 0.00 0.0
2003 69 45 0.00 0.0
2002 86 63 0.00 0.0
2001 99 58 0.00 0.0
2000 92 56 0.00 0.0
1999 76 64 0.00 0.0
1998 82 51 0.00 0.0
1997 86 55 0.00 0.0
1996 69 51 0.02 0.0
1995 68 49 0.00 0.0
1994 97 56 0.00 0.0
1993 84 55 0.04 0.0
1992 96 60 0.00 0.0
1991 81 41 0.00 0.0
1990 93 57 0.00 0.0
1989 74 40 0.00 0.0
1988 101 67 0.02 0.0
1987 80 55 0.00 0.0
1986 77 48 0.00 0.0
1985 83 49 0.00 0.0
1984 66 44 0.00 0.0
1983 76 48 0.00 0.0
1982 85 60 0.00 0.0
1981 79 46 0.00 0.0
1980 90 54 0.00 0.0
1979 81 53 0.04 0.0
1978 84 52 0.00 0.0
1977 82 52 0.00 0.0
1976 74 52 0.00 0.0
1975 77 46 0.00 0.0
1974 88 57 0.00 0.0
1973 98 65 0.00 0.0
1972 80 54 0.00 0.0
1971 97 60 0.00 0.0
1970 98 66 0.00 0.0
1969 80 60 0.00 0.0
1968 90 58 0.00 0.0
1967 81 57 0.30 0.0
1966 74 55 0.00 0.0
1965 85 53 0.00 0.0
1964 67 45 0.00 0.0
1963 67 51 0.01 0.0
1962 87 57 0.00 0.0
1961 89 56 0.00 0.0
1960 75 40 0.00 0.0
1959 93 65 0.09 0.0
1958 92 58 0.00 0.0
1957 70 45 0.00 0.0
1956 71 43 0.00 0.0
1955 102 62 0.00 0.0
1954 84 52 0.00 0.0
1953 79 49 0.00 0.0
1952 68 49 0.09 0.0
1951 78 47 0.00 0.0
1950 78 57 0.01 0.0
1949 87 52 0.00 0.0
1948 64 51 0.13 0.0
1947 76 52 0.00 0.0
1946 91 63 0.00 0.0
1945 102 61 0.04 0.0
1944 65 52 0.16 0.0
1943 79 51 0.01 0.0
1942 75 43 0.00 0.0
1941 82 52 0.00 0.0
1940 88 48 0.00 0.0
1939 80 45 0.00 0.0
1938 74 57 0.00 0.0
1937 88 55 0.00 0.0
1936 96 48 0.00 0.0
1935 93 45 n/a n/a
1934 87 49 0.00 n/a
1933 88 48 0.00 n/a
1932 94 50 0.00 n/a
1931 86 48 0.00 n/a
1930 84 42 0.00 n/a
1929 84 43 0.00 n/a
1928 80 55 0.16 n/a
1927 88 45 0.00 n/a
1926 82 43 0.00 0.0
1925 94 59 0.02 0.0
1924 91 50 0.00 0.0
1923 71 50 0.05 0.0
1922 93 64 0.00 0.0
1921 90 52 0.00 0.0
1920 96 60 0.00 0.0
1919 93 51 0.00 0.0
1918 88 68 0.01 0.0
1917 79 49 0.00 0.0
1916 59 34 0.00 0.0
1915 83 39 0.00 0.0
1914 71 47 0.15 0.0
1913 79 48 0.00 0.0
1912 78 47 0.00 0.0
1911 89 63 0.01 0.0
What's the all-time high for Boise on 6/21?
For the date of Jun 21, the highest temperature ever reached in Boise history is 102 °F which has happened 2 times, most recently in 1955.
Highest Temperatures in Boise on June 21
Rank Temperature Year
1 102 °F 1955
1 102 °F 1945
3 101 °F 2008
3 101 °F 2005
3 101 °F 1988
6 99 °F 2001
7 98 °F 1973
7 98 °F 1970
9 97 °F 1971
9 97 °F 1994
What's the all-time low for Boise on 6/21?
For the date of Jun 21, the lowest temperature ever reached in Boise history is 34 °F which happened in 1916.
Lowest Temperatures in Boise on June 21
Rank Temperature Year
1 34 °F 1916
2 39 °F 1915
3 40 °F 1960
3 40 °F 1989
5 41 °F 1991
6 42 °F 1930
7 43 °F 1926
7 43 °F 1956
7 43 °F 1929
7 43 °F 2023
7 43 °F 1942
Lowest High Temperatures in Boise on June 21
Rank Temperature Year
1 59 °F 1916
2 64 °F 1948
3 65 °F 1944
4 66 °F 2009
4 66 °F 1984
6 67 °F 2019
6 67 °F 1963
6 67 °F 1964
9 68 °F 1952
9 68 °F 1995
What's the most it has ever rained in Boise on 6/21?
For the date of Jun 21, the most precipitation ever recorded in Boise history is 0.30 inches which happened in 1967.
All-Time Most Precipitation in Boise on June 21
Rank Precipitation Year
1 0.30 inches 1967
2 0.16 inches 1928
2 0.16 inches 1944
4 0.15 inches 1914
5 0.13 inches 1948
6 0.09 inches 1952
6 0.09 inches 1959
8 0.05 inches 1923
9 0.04 inches 1945
9 0.04 inches 1993
9 0.04 inches 1979
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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