Boston June 21 Weather Records

Daily averages and all-time records for weather in Boston, Massachusetts for the date of June 21.
June 21 All-Time Records
1893–2024
Highest temperature 96 °F 2012
Lowest temperature 48 °F 1940
Lowest daily high 56 °F 1903
Highest daily low 80 °F 2012
Most precipitation 2.36 inches 1903
Most snow none -
June 21 Average Weather
1991–2020 1
Average high 78.4 °F
Average low 61.8 °F
Chance precipitation 33.4%
Chance snow 0%
Boston June 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 66 57 0.00 0.0
2022 71 53 0.00 0.0
2021 87 69 0.00 0.0
2020 87 67 0.00 0.0
2019 76 61 1.19 0.0
2018 80 64 0.00 0.0
2017 84 67 0.00 0.0
2016 87 64 0.02 0.0
2015 76 60 1.72 0.0
2014 75 57 0.00 0.0
2013 84 61 0.00 0.0
2012 96 80 0.00 0.0
2011 76 65 0.00 0.0
2010 85 68 0.00 0.0
2009 64 60 0.04 0.0
2008 83 63 0.00 0.0
2007 81 62 0.09 0.0
2006 79 64 0.00 0.0
2005 84 57 0.00 0.0
2004 78 59 0.00 0.0
2003 66 58 0.21 0.0
2002 85 60 0.00 0.0
2001 71 61 0.00 0.0
2000 83 61 0.00 0.0
1999 74 59 0.00 0.0
1998 68 58 0.00 0.0
1997 92 68 0.00 0.0
1996 77 60 0.11 0.0
1995 69 61 0.00 0.0
1994 74 65 0.09 0.0
1993 85 61 0.08 0.0
1992 80 63 0.01 0.0
1991 88 70 0.00 0.0
1990 64 57 0.02 0.0
1989 78 62 0.00 0.0
1988 93 71 0.00 0.0
1987 66 58 0.00 0.0
1986 67 53 0.00 0.0
1985 78 58 0.00 0.0
1984 76 59 0.00 0.0
1983 81 65 0.00 0.0
1982 73 56 0.82 0.0
1981 79 67 0.00 0.0
1980 76 55 0.00 0.0
1979 70 56 0.00 0.0
1978 63 55 0.00 0.0
1977 81 63 0.00 0.0
1976 90 71 0.00 0.0
1975 81 60 0.00 0.0
1974 81 66 0.26 0.0
1973 87 68 0.00 0.0
1972 70 59 0.00 0.0
1971 90 67 0.45 0.0
1970 73 54 0.02 0.0
1969 66 58 0.00 0.0
1968 75 54 0.00 0.0
1967 59 50 0.02 0.0
1966 86 64 0.00 0.0
1965 90 66 0.00 0.0
1964 81 60 0.00 0.0
1963 71 55 0.09 0.0
1962 66 58 0.11 0.0
1961 77 63 0.00 0.0
1960 82 58 0.00 0.0
1959 81 64 0.00 0.0
1958 60 53 0.00 0.0
1957 79 61 0.00 0.0
1956 69 59 0.00 0.0
1955 69 58 0.16 0.0
1954 93 66 0.00 0.0
1953 83 62 0.00 0.0
1952 73 60 0.00 0.0
1951 82 65 0.00 0.0
1950 81 61 0.13 0.0
1949 95 60 0.00 0.0
1948 81 59 0.00 0.0
1947 75 50 0.00 0.0
1946 80 61 0.19 0.0
1945 80 61 0.13 0.0
1944 57 51 0.35 0.0
1943 84 62 0.14 0.0
1942 67 61 0.10 0.0
1941 94 74 0.00 0.0
1940 64 48 0.00 0.0
1939 88 69 0.00 0.0
1938 93 66 0.00 0.0
1937 69 56 0.62 0.0
1936 84 61 0.01 0.0
1935 79 56 0.00 0.0
1934 90 65 0.05 0.0
1933 75 57 0.42 0.0
1932 81 60 0.00 0.0
1931 84 62 0.02 0.0
1930 80 63 0.48 0.0
1929 72 61 0.00 0.0
1928 62 56 0.00 0.0
1927 75 56 0.00 0.0
1926 75 53 0.00 0.0
1925 83 62 0.00 0.0
1924 75 59 0.33 0.0
1923 95 67 0.00 0.0
1922 59 56 1.05 0.0
1921 88 65 0.00 0.0
1920 62 54 0.38 0.0
1919 85 62 0.00 0.0
1918 66 49 0.07 0.0
1917 83 62 0.00 0.0
1916 75 51 0.20 0.0
1915 73 59 0.00 0.0
1914 78 55 0.00 0.0
1913 72 58 0.07 0.0
1912 83 63 0.00 0.0
1911 71 55 0.00 0.0
1910 92 69 0.00 0.0
1909 88 72 0.00 0.0
1908 90 70 0.00 0.0
1907 86 68 0.00 0.0
1906 79 57 0.00 0.0
1905 57 53 0.76 0.0
1904 84 66 0.12 0.0
1903 56 51 2.36 0.0
1902 67 58 0.31 0.0
1901 78 61 0.04 0.0
1900 82 62 0.00 0.0
1899 76 60 0.12 0.0
1898 73 58 0.20 0.0
1897 70 50 0.00 0.0
1896 92 71 0.03 0.0
1895 72 64 0.00 0.0
1894 83 65 0.33 0.0
1893 76 63 0.00 0.0
What's the all-time high for Boston on 6/21?
For the date of Jun 21, the highest temperature ever reached in Boston history is 96 °F which happened in 2012.
Highest Temperatures in Boston on June 21
Rank Temperature Year
1 96 °F 2012
2 95 °F 1949
2 95 °F 1923
4 94 °F 1941
5 93 °F 1988
5 93 °F 1954
5 93 °F 1938
8 92 °F 1910
8 92 °F 1997
8 92 °F 1896
What's the all-time low for Boston on 6/21?
For the date of Jun 21, the lowest temperature ever reached in Boston history is 48 °F which happened in 1940.
Lowest Temperatures in Boston on June 21
Rank Temperature Year
1 48 °F 1940
2 49 °F 1918
3 50 °F 1897
3 50 °F 1967
3 50 °F 1947
6 51 °F 1944
6 51 °F 1903
6 51 °F 1916
9 53 °F 1926
9 53 °F 2022
9 53 °F 1986
9 53 °F 1958
9 53 °F 1905
Lowest High Temperatures in Boston on June 21
Rank Temperature Year
1 56 °F 1903
2 57 °F 1944
2 57 °F 1905
4 59 °F 1967
4 59 °F 1922
6 60 °F 1958
7 62 °F 1928
7 62 °F 1920
9 63 °F 1978
10 64 °F 1940
10 64 °F 1990
10 64 °F 2009
What's the most it has ever rained in Boston on 6/21?
For the date of Jun 21, the most precipitation ever recorded in Boston history is 2.36 inches which happened in 1903.
All-Time Most Precipitation in Boston on June 21
Rank Precipitation Year
1 2.36 inches 1903
2 1.72 inches 2015
3 1.19 inches 2019
4 1.05 inches 1922
5 0.82 inches 1982
6 0.76 inches 1905
7 0.62 inches 1937
8 0.48 inches 1930
9 0.45 inches 1971
10 0.42 inches 1933
Weather Station Details
Years Station Coordinates
1936–2024 Boston Logan International Airport location
1893–1935 Boston City location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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